Loading Indicator

The M3 Expressive loading moment. A morphing-shape indicator for indeterminate waits — distinct from a progress indicator, which reports how far along something is. Two variants, a five-rung density ladder, a themable shape part, and a three-prop API on purpose.

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HTML React Angular Vue Svelte

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<!-- index.html — register the AWC UI elements once -->
<script type="module">
  import '@awc-ui/core/define';
</script>

<md-loading-indicator label="Loading"></md-loading-indicator>
<md-loading-indicator variant="contained" label="Loading results"></md-loading-indicator>

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import { MdLoadingIndicator } from '@awc-ui/react';

export function Demo() {
  return (
    <>
      <MdLoadingIndicator label="Loading"></MdLoadingIndicator>
      <MdLoadingIndicator variant="contained" label="Loading results"></MdLoadingIndicator>
    </>
  );
}

Copy

// app.module.ts — register the AWC UI elements once
import { CUSTOM_ELEMENTS_SCHEMA, NgModule } from '@angular/core';
import { AwcUiModule } from '@awc-ui/angular';

@NgModule({
  imports: [AwcUiModule],
  schemas: [CUSTOM_ELEMENTS_SCHEMA],
})
export class AppModule {}

<!-- app.component.html -->
<md-loading-indicator label="Loading"></md-loading-indicator>
<md-loading-indicator variant="contained" label="Loading results"></md-loading-indicator>

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<script setup>
import '@awc-ui/core/define';
</script>

<template>
  <md-loading-indicator label="Loading"></md-loading-indicator>
  <md-loading-indicator variant="contained" label="Loading results"></md-loading-indicator>
</template>

Copy

<script>
  import '@awc-ui/core/define';
</script>

<md-loading-indicator label="Loading"></md-loading-indicator>
<md-loading-indicator variant="contained" label="Loading results"></md-loading-indicator>

Install

Already installed? See the Installation guide for one-time package setup (core + tokens, fonts). Each tab below shows two patterns for using md-loading-indicator in your project: Option A registers every AWC UI component at once (simplest), Option B imports only this component for tree-shake-friendly bundles.

HTML React Angular Vue Svelte

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<!-- ─── Option A: global registration (all components) ─── -->
<script type="module">
  import '@awc-ui/core/define';
</script>


<!-- ─── Option B: single import (tree-shake only md-loading-indicator) ─── -->
<script type="module">
  import '@awc-ui/core/components/md-loading-indicator';
</script>


<md-loading-indicator></md-loading-indicator>

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// ─── Option A: typed React wrapper (registers all components) ───
//   Importing from '@awc-ui/react' calls defineCustomElements() as a
//   side effect, so every md-* element becomes available in the browser.
import { MdLoadingIndicator } from '@awc-ui/react';

export function Example() {
  return <MdLoadingIndicator></MdLoadingIndicator>;
}


// ─── Option B: single import (tree-shake to only md-loading-indicator) ───
//   Skip the wrapper and use the raw custom element. Smallest bundle,
//   but you lose typed props/events on JSX.
import '@awc-ui/core/components/md-loading-indicator';

export function ExampleTreeShaken() {
  return <md-loading-indicator></md-loading-indicator>;
}

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// ─── Option A: schema module (any md-* element accepted) ───
//   Pair with `defineCustomElements(window)` in main.ts.
import { Component, CUSTOM_ELEMENTS_SCHEMA } from '@angular/core';
import { AwcUiModule } from '@awc-ui/angular';

@Component({
  standalone: true,
  imports: [AwcUiModule],
  schemas: [CUSTOM_ELEMENTS_SCHEMA],
  template: `<md-loading-indicator></md-loading-indicator>`,
})
export class ExampleComponent {}


// ─── Option B: typed directive (tree-shake friendly) ───
//   Pair with `import '@awc-ui/core/components/md-loading-indicator'` in main.ts.
import { Component } from '@angular/core';
import { MdLoadingIndicator } from '@awc-ui/angular';

@Component({
  standalone: true,
  imports: [MdLoadingIndicator],
  template: `<md-loading-indicator></md-loading-indicator>`,
})
export class ExampleTreeShakenComponent {}

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<!-- ─── Option A: typed Vue wrapper (registers all components) ─── -->
<script setup lang="ts">
import { MdLoadingIndicator } from '@awc-ui/vue';
</script>

<template>
  <MdLoadingIndicator></MdLoadingIndicator>
</template>


<!-- ─── Option B: single import (tree-shake to only md-loading-indicator) ─── -->
<script setup lang="ts">
import '@awc-ui/core/components/md-loading-indicator';
</script>

<template>
  <md-loading-indicator></md-loading-indicator>
</template>

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<!-- ─── Option A: global registration (done once in main entry) ─── -->
<!-- main.ts:                                                          -->
<!--   import { defineCustomElements } from '@awc-ui/svelte';        -->
<!--   defineCustomElements(window);                                   -->

<md-loading-indicator></md-loading-indicator>


<!-- ─── Option B: single import (tree-shake to only md-loading-indicator) ─── -->
<script lang="ts">
  import '@awc-ui/core/components/md-loading-indicator';
</script>

<md-loading-indicator></md-loading-indicator>

When to use

• An indeterminate wait where you cannot report progress: a refresh, a search, an initial fetch.
• Pull-to-refresh and similar whole-screen refresh moments.
• Inside pickers while options load — which is exactly how md-select, md-multi-select, md-autocomplete and md-search use it internally.

When not to use

Situation	Use instead
You know how far along the operation is	md-progress-indicator (determinate)
Content whose shape is known	md-skeleton
A button working after a click	md-button with loading
An operation that will become determinate	md-progress-indicator — M3 says don’t transition from a loading indicator
A long background job not blocking the view	Linear md-progress-indicator

Always indeterminate — there is no value

That is the whole distinction from md-progress-indicator. Three props, no events, no methods, no slots. If you are reaching for more control, you want the progress indicator instead.

Variants

variant is the only visual switch. uncontained (the default) paints the bare morphing shape onto whatever surface it sits on; contained adds its own container behind it and re-tones the shape to on-primary-container so it reads against that backdrop.

Variant	Use for
uncontained	Default. On an existing surface — a list, a card body, a picker
contained	Over content or imagery, where the shape needs its own backdrop

Uncontained and contained

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HTML React Angular Vue Svelte

Copy

<!-- index.html — register the AWC UI elements once -->
<script type="module">
  import '@awc-ui/core/define';
</script>

<md-loading-indicator label="Uncontained"></md-loading-indicator>
<md-loading-indicator variant="contained" label="Contained"></md-loading-indicator>

Copy

import { MdLoadingIndicator } from '@awc-ui/react';

export function Demo() {
  return (
    <>
      <MdLoadingIndicator label="Uncontained"></MdLoadingIndicator>
      <MdLoadingIndicator variant="contained" label="Contained"></MdLoadingIndicator>
    </>
  );
}

Copy

// app.module.ts — register the AWC UI elements once
import { CUSTOM_ELEMENTS_SCHEMA, NgModule } from '@angular/core';
import { AwcUiModule } from '@awc-ui/angular';

@NgModule({
  imports: [AwcUiModule],
  schemas: [CUSTOM_ELEMENTS_SCHEMA],
})
export class AppModule {}

<!-- app.component.html -->
<md-loading-indicator label="Uncontained"></md-loading-indicator>
<md-loading-indicator variant="contained" label="Contained"></md-loading-indicator>

Copy

<script setup>
import '@awc-ui/core/define';
</script>

<template>
  <md-loading-indicator label="Uncontained"></md-loading-indicator>
  <md-loading-indicator variant="contained" label="Contained"></md-loading-indicator>
</template>

Copy

<script>
  import '@awc-ui/core/define';
</script>

<md-loading-indicator label="Uncontained"></md-loading-indicator>
<md-loading-indicator variant="contained" label="Contained"></md-loading-indicator>

Size

There is no size prop — scale it with the two custom properties. The defaults are a 48px box around a 38px shape, so set --md-loading-indicator-shape-size alongside --md-loading-indicator-size to keep that proportion.

Custom property	Default	Scales
--md-loading-indicator-size	48px	The overall box — and the contained backdrop
--md-loading-indicator-shape-size	38px	The morphing shape inside it

Sizes — 32px, 48px (default), 64px, in both variants

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HTML React Angular Vue Svelte

Copy

<!-- index.html — register the AWC UI elements once -->
<script type="module">
  import '@awc-ui/core/define';
</script>

<md-loading-indicator label="Small" style="--md-loading-indicator-size: 32px; --md-loading-indicator-shape-size: 24px;"></md-loading-indicator>
<md-loading-indicator label="Default"></md-loading-indicator>
<md-loading-indicator label="Large" style="--md-loading-indicator-size: 64px; --md-loading-indicator-shape-size: 52px;"></md-loading-indicator>
<md-loading-indicator variant="contained" label="Small contained" style="--md-loading-indicator-size: 32px; --md-loading-indicator-shape-size: 24px;"></md-loading-indicator>
<md-loading-indicator variant="contained" label="Default contained"></md-loading-indicator>
<md-loading-indicator variant="contained" label="Large contained" style="--md-loading-indicator-size: 64px; --md-loading-indicator-shape-size: 52px;"></md-loading-indicator>

Copy

import { MdLoadingIndicator } from '@awc-ui/react';

export function Demo() {
  return (
    <>
      <MdLoadingIndicator label="Small" style={{ '--md-loading-indicator-size': '32px', '--md-loading-indicator-shape-size': '24px' }}></MdLoadingIndicator>
      <MdLoadingIndicator label="Default"></MdLoadingIndicator>
      <MdLoadingIndicator label="Large" style={{ '--md-loading-indicator-size': '64px', '--md-loading-indicator-shape-size': '52px' }}></MdLoadingIndicator>
      <MdLoadingIndicator variant="contained" label="Small contained" style={{ '--md-loading-indicator-size': '32px', '--md-loading-indicator-shape-size': '24px' }}></MdLoadingIndicator>
      <MdLoadingIndicator variant="contained" label="Default contained"></MdLoadingIndicator>
      <MdLoadingIndicator variant="contained" label="Large contained" style={{ '--md-loading-indicator-size': '64px', '--md-loading-indicator-shape-size': '52px' }}></MdLoadingIndicator>
    </>
  );
}

Copy

// app.module.ts — register the AWC UI elements once
import { CUSTOM_ELEMENTS_SCHEMA, NgModule } from '@angular/core';
import { AwcUiModule } from '@awc-ui/angular';

@NgModule({
  imports: [AwcUiModule],
  schemas: [CUSTOM_ELEMENTS_SCHEMA],
})
export class AppModule {}

<!-- app.component.html -->
<md-loading-indicator label="Small" style="--md-loading-indicator-size: 32px; --md-loading-indicator-shape-size: 24px;"></md-loading-indicator>
<md-loading-indicator label="Default"></md-loading-indicator>
<md-loading-indicator label="Large" style="--md-loading-indicator-size: 64px; --md-loading-indicator-shape-size: 52px;"></md-loading-indicator>
<md-loading-indicator variant="contained" label="Small contained" style="--md-loading-indicator-size: 32px; --md-loading-indicator-shape-size: 24px;"></md-loading-indicator>
<md-loading-indicator variant="contained" label="Default contained"></md-loading-indicator>
<md-loading-indicator variant="contained" label="Large contained" style="--md-loading-indicator-size: 64px; --md-loading-indicator-shape-size: 52px;"></md-loading-indicator>

Copy

<script setup>
import '@awc-ui/core/define';
</script>

<template>
  <md-loading-indicator label="Small" style="--md-loading-indicator-size: 32px; --md-loading-indicator-shape-size: 24px;"></md-loading-indicator>
  <md-loading-indicator label="Default"></md-loading-indicator>
  <md-loading-indicator label="Large" style="--md-loading-indicator-size: 64px; --md-loading-indicator-shape-size: 52px;"></md-loading-indicator>
  <md-loading-indicator variant="contained" label="Small contained" style="--md-loading-indicator-size: 32px; --md-loading-indicator-shape-size: 24px;"></md-loading-indicator>
  <md-loading-indicator variant="contained" label="Default contained"></md-loading-indicator>
  <md-loading-indicator variant="contained" label="Large contained" style="--md-loading-indicator-size: 64px; --md-loading-indicator-shape-size: 52px;"></md-loading-indicator>
</template>

Copy

<script>
  import '@awc-ui/core/define';
</script>

<md-loading-indicator label="Small" style="--md-loading-indicator-size: 32px; --md-loading-indicator-shape-size: 24px;"></md-loading-indicator>
<md-loading-indicator label="Default"></md-loading-indicator>
<md-loading-indicator label="Large" style="--md-loading-indicator-size: 64px; --md-loading-indicator-shape-size: 52px;"></md-loading-indicator>
<md-loading-indicator variant="contained" label="Small contained" style="--md-loading-indicator-size: 32px; --md-loading-indicator-shape-size: 24px;"></md-loading-indicator>
<md-loading-indicator variant="contained" label="Default contained"></md-loading-indicator>
<md-loading-indicator variant="contained" label="Large contained" style="--md-loading-indicator-size: 64px; --md-loading-indicator-shape-size: 52px;"></md-loading-indicator>

Set only one and the proportion drifts

Both properties have independent defaults, so overriding --md-loading-indicator-size alone leaves a 38px shape inside a 32px box — it overflows. Change them as a pair, or reach for density instead, which moves both from one signal.

In context

M3’s rule is that the indicator must stay in view for the whole activity. An indicator that scrolls off-screen hides the status and implies the refresh belongs to one component rather than the screen — pin it.

Whole-screen moment and an inline wait

Loading content…

Fetching results…

Show code for each technology

HTML React Angular Vue Svelte

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<!-- index.html — register the AWC UI elements once -->
<script type="module">
  import '@awc-ui/core/define';
</script>

<div style="inline-size: 100%; max-inline-size: 420px; display: flex; flex-direction: column; gap: 16px;">
  <div style="display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 12px; min-block-size: 160px; padding: 16px; border-radius: 12px; background: var(--md-sys-color-surface-container-low); color: var(--md-sys-color-on-surface);">
    <md-loading-indicator variant="contained" label="Loading content"></md-loading-indicator>
    <span style="font-size: 14px; color: var(--md-sys-color-on-surface-variant);">Loading content…</span>
  </div>
  <div style="display: flex; align-items: center; gap: 12px; padding: 16px; border-radius: 12px; background: var(--md-sys-color-surface-container-low); color: var(--md-sys-color-on-surface);">
    <md-loading-indicator label="Fetching results" style="--md-loading-indicator-size: 32px; --md-loading-indicator-shape-size: 24px;"></md-loading-indicator>
    <span style="font-size: 14px;">Fetching results…</span>
  </div>
</div>

Copy

import { MdLoadingIndicator } from '@awc-ui/react';

export function Demo() {
  return (
    <>
      <div style={{ inlineSize: '100%', maxInlineSize: '420px', display: 'flex', flexDirection: 'column', gap: '16px' }}>
        <div style={{ display: 'flex', flexDirection: 'column', alignItems: 'center', justifyContent: 'center', gap: '12px', minBlockSize: '160px', padding: '16px', borderRadius: '12px', background: 'var(--md-sys-color-surface-container-low)', color: 'var(--md-sys-color-on-surface)' }}>
          <MdLoadingIndicator variant="contained" label="Loading content"></MdLoadingIndicator>
          <span style={{ fontSize: '14px', color: 'var(--md-sys-color-on-surface-variant)' }}>Loading content…</span>
        </div>
        <div style={{ display: 'flex', alignItems: 'center', gap: '12px', padding: '16px', borderRadius: '12px', background: 'var(--md-sys-color-surface-container-low)', color: 'var(--md-sys-color-on-surface)' }}>
          <MdLoadingIndicator label="Fetching results" style={{ '--md-loading-indicator-size': '32px', '--md-loading-indicator-shape-size': '24px' }}></MdLoadingIndicator>
          <span style={{ fontSize: '14px' }}>Fetching results…</span>
        </div>
      </div>
    </>
  );
}

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// app.module.ts — register the AWC UI elements once
import { CUSTOM_ELEMENTS_SCHEMA, NgModule } from '@angular/core';
import { AwcUiModule } from '@awc-ui/angular';

@NgModule({
  imports: [AwcUiModule],
  schemas: [CUSTOM_ELEMENTS_SCHEMA],
})
export class AppModule {}

<!-- app.component.html -->
<div style="inline-size: 100%; max-inline-size: 420px; display: flex; flex-direction: column; gap: 16px;">
  <div style="display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 12px; min-block-size: 160px; padding: 16px; border-radius: 12px; background: var(--md-sys-color-surface-container-low); color: var(--md-sys-color-on-surface);">
    <md-loading-indicator variant="contained" label="Loading content"></md-loading-indicator>
    <span style="font-size: 14px; color: var(--md-sys-color-on-surface-variant);">Loading content…</span>
  </div>
  <div style="display: flex; align-items: center; gap: 12px; padding: 16px; border-radius: 12px; background: var(--md-sys-color-surface-container-low); color: var(--md-sys-color-on-surface);">
    <md-loading-indicator label="Fetching results" style="--md-loading-indicator-size: 32px; --md-loading-indicator-shape-size: 24px;"></md-loading-indicator>
    <span style="font-size: 14px;">Fetching results…</span>
  </div>
</div>

Copy

<script setup>
import '@awc-ui/core/define';
</script>

<template>
  <div style="inline-size: 100%; max-inline-size: 420px; display: flex; flex-direction: column; gap: 16px;">
    <div style="display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 12px; min-block-size: 160px; padding: 16px; border-radius: 12px; background: var(--md-sys-color-surface-container-low); color: var(--md-sys-color-on-surface);">
      <md-loading-indicator variant="contained" label="Loading content"></md-loading-indicator>
      <span style="font-size: 14px; color: var(--md-sys-color-on-surface-variant);">Loading content…</span>
    </div>
    <div style="display: flex; align-items: center; gap: 12px; padding: 16px; border-radius: 12px; background: var(--md-sys-color-surface-container-low); color: var(--md-sys-color-on-surface);">
      <md-loading-indicator label="Fetching results" style="--md-loading-indicator-size: 32px; --md-loading-indicator-shape-size: 24px;"></md-loading-indicator>
      <span style="font-size: 14px;">Fetching results…</span>
    </div>
  </div>
</template>

Copy

<script>
  import '@awc-ui/core/define';
</script>

<div style="inline-size: 100%; max-inline-size: 420px; display: flex; flex-direction: column; gap: 16px;">
  <div style="display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 12px; min-block-size: 160px; padding: 16px; border-radius: 12px; background: var(--md-sys-color-surface-container-low); color: var(--md-sys-color-on-surface);">
    <md-loading-indicator variant="contained" label="Loading content"></md-loading-indicator>
    <span style="font-size: 14px; color: var(--md-sys-color-on-surface-variant);">Loading content…</span>
  </div>
  <div style="display: flex; align-items: center; gap: 12px; padding: 16px; border-radius: 12px; background: var(--md-sys-color-surface-container-low); color: var(--md-sys-color-on-surface);">
    <md-loading-indicator label="Fetching results" style="--md-loading-indicator-size: 32px; --md-loading-indicator-shape-size: 24px;"></md-loading-indicator>
    <span style="font-size: 14px;">Fetching results…</span>
  </div>
</div>

Resolving it

It has no timeout — it spins until you remove it. Always resolve it on failure as well as on success. Press either button: the failing one removes the indicator just as the succeeding one does, and shows an error in its place.

Resolve on failure too — the spinner is never the end state

Load (succeeds) Load (fails)

Press a button to start.

Show code for each technology

HTML React Angular Vue Svelte

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<div style="display: flex; gap: 12px;">
<md-button variant="filled" id="load-ok">Load (succeeds)</md-button>
<md-button variant="outlined" id="load-fail">Load (fails)</md-button>
</div>
<div id="results">Press a button to start.</div>

<script type="module">
const results = document.getElementById('results');

async function load(shouldFail) {
  results.innerHTML =
    '<md-loading-indicator variant="contained" label="Loading results"></md-loading-indicator>';
  try {
    results.textContent = await fetchResults(shouldFail);
  } catch {
    results.textContent = 'Could not load results.';  // the indicator goes either way
  }
}

document.getElementById('load-ok').addEventListener('mdClick', () => load(false));
document.getElementById('load-fail').addEventListener('mdClick', () => load(true));
</script>

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import { MdButton, MdLoadingIndicator } from '@awc-ui/react';
import { useState } from 'react';

export function Results() {
const [loading, setLoading] = useState(false);
const [text, setText] = useState('Press a button to start.');

async function load(shouldFail: boolean) {
  setLoading(true);
  try {
    setText(await fetchResults(shouldFail));
  } catch {
    setText('Could not load results.');
  } finally {
    setLoading(false);   // success or failure
  }
}

return (
  <>
    <MdButton variant="filled" onMdClick={() => load(false)}>Load (succeeds)</MdButton>
    <MdButton variant="outlined" onMdClick={() => load(true)}>Load (fails)</MdButton>

    {loading
      ? <MdLoadingIndicator variant="contained" label="Loading results" />
      : <p>{text}</p>}
  </>
);
}

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import { Component } from '@angular/core';

@Component({
selector: 'app-results',
template: `
  <md-button variant="filled" (mdClick)="load(false)">Load (succeeds)</md-button>
  <md-button variant="outlined" (mdClick)="load(true)">Load (fails)</md-button>

  <md-loading-indicator *ngIf="loading" variant="contained" label="Loading results"></md-loading-indicator>
  <p *ngIf="!loading">{{ text }}</p>
`,
})
export class ResultsComponent {
loading = false;
text = 'Press a button to start.';

async load(shouldFail: boolean) {
  this.loading = true;
  try {
    this.text = await fetchResults(shouldFail);
  } catch {
    this.text = 'Could not load results.';
  } finally {
    this.loading = false;   // success or failure
  }
}
}

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<script setup lang="ts">
import { ref } from 'vue';

const loading = ref(false);
const text = ref('Press a button to start.');

async function load(shouldFail: boolean) {
loading.value = true;
try {
  text.value = await fetchResults(shouldFail);
} catch {
  text.value = 'Could not load results.';
} finally {
  loading.value = false;   // success or failure
}
}
</script>

<template>
<md-button variant="filled" @mdClick="load(false)">Load (succeeds)</md-button>
<md-button variant="outlined" @mdClick="load(true)">Load (fails)</md-button>

<md-loading-indicator v-if="loading" variant="contained" label="Loading results" />
<p v-else>{{ text }}</p>
</template>

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<script lang="ts">
let loading = false;
let text = 'Press a button to start.';

async function load(shouldFail: boolean) {
  loading = true;
  try {
    text = await fetchResults(shouldFail);
  } catch {
    text = 'Could not load results.';
  } finally {
    loading = false;   // success or failure
  }
}
</script>

<md-button variant="filled" on:mdClick={() => load(false)}>Load (succeeds)</md-button>
<md-button variant="outlined" on:mdClick={() => load(true)}>Load (fails)</md-button>

{#if loading}
<md-loading-indicator variant="contained" label="Loading results" />
{:else}
<p>{text}</p>
{/if}

The same promise for a fetch that starts on mount — note the finally / catch arm in every one:

HTML React Angular Vue Svelte

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<div id="results-slot">
<md-loading-indicator label="Loading results"></md-loading-indicator>
</div>

<script type="module">
const slot = document.getElementById('results-slot');

try {
  renderResults(await fetchData());
} catch {
  renderError();
} finally {
  slot.querySelector('md-loading-indicator')?.remove();   // success or failure
}
</script>

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import { MdLoadingIndicator } from '@awc-ui/react';
import { useEffect, useState } from 'react';

export function Results() {
const [state, setState] = useState<'loading' | 'ready' | 'error'>('loading');
const [rows, setRows] = useState<Row[]>([]);

useEffect(() => {
  fetchData()
    .then((r) => { setRows(r); setState('ready'); })
    .catch(() => setState('error'));       // never leave it spinning
}, []);

if (state === 'loading') return <MdLoadingIndicator label="Loading results" />;
if (state === 'error') return <ErrorState />;
return <RowList rows={rows} />;
}

Copy

import { Component, OnInit } from '@angular/core';

@Component({
selector: 'app-results',
template: `
  <md-loading-indicator *ngIf="state === 'loading'" label="Loading results"></md-loading-indicator>
  <app-error-state *ngIf="state === 'error'"></app-error-state>
  <app-row-list *ngIf="state === 'ready'" [rows]="rows"></app-row-list>
`,
})
export class ResultsComponent implements OnInit {
state: 'loading' | 'ready' | 'error' = 'loading';
rows: Row[] = [];

async ngOnInit() {
  try {
    this.rows = await fetchData();
    this.state = 'ready';
  } catch {
    this.state = 'error';   // never leave it spinning
  }
}
}

Copy

<script setup lang="ts">
import { ref, onMounted } from 'vue';

const state = ref<'loading' | 'ready' | 'error'>('loading');
const rows = ref<Row[]>([]);

onMounted(async () => {
try {
  rows.value = await fetchData();
  state.value = 'ready';
} catch {
  state.value = 'error';   // never leave it spinning
}
});
</script>

<template>
<md-loading-indicator v-if="state === 'loading'" label="Loading results" />
<ErrorState v-else-if="state === 'error'" />
<RowList v-else :rows="rows" />
</template>

Copy

<script lang="ts">
import { onMount } from 'svelte';

let state: 'loading' | 'ready' | 'error' = 'loading';
let rows: Row[] = [];

onMount(async () => {
  try {
    rows = await fetchData();
    state = 'ready';
  } catch {
    state = 'error';   // never leave it spinning
  }
});
</script>

{#if state === 'loading'}
<md-loading-indicator label="Loading results" />
{:else if state === 'error'}
<ErrorState />
{:else}
<RowList {rows} />
{/if}

An unresolved indicator is a hang, not a wait

There is no timeout and no failure state. If the request rejects and nothing removes the element, the screen keeps promising work that stopped — and aria-live="polite" keeps the stale “Loading” text in the accessibility tree. Remove it in finally, not in the success branch.

API Reference

tune

Properties

Property	Attribute	Type	Default	Reflects
variant	variant	'uncontained' | 'contained'	'uncontained'	Yes
label	label	string	'Loading'	—
density	density	0 | -1 | -2 | -3 | -4	0	Yes

palette

CSS Custom Properties

Override on the host element for per-instance theming:

Property	Description
--md-loading-indicator-color	Indicator shape color
--md-loading-indicator-size	Overall component size (default 48px)
--md-loading-indicator-shape-size	Morphing shape size (default 38px)
--md-loading-indicator-container-color	Container background (contained variant)
--md-loading-indicator-container-shape	Container border radius

layers

CSS Shadow Parts

Style internal elements through shadow DOM with ::part():

Part	Description
shape	The morphing indicator shape

Accessibility

• The host carries role="progressbar" with aria-live="polite", plus an internal role="status" element holding the same text — so the label is announced when the indicator appears.
• label is the accessible name and defaults to the English "Loading". Make it specific — “Refreshing messages”.
• Some assistive technologies can focus a progressbar programmatically, so the component ships a focus ring: 3px secondary at 2px offset, following the container shape.
• prefers-reduced-motion is already handled — the morph is replaced by a gentle opacity pulse on a circle. You do not need to write that CSS.
• Because it is indeterminate, screen-reader users get no completion cue from the component: announce the result yourself when loading ends.
• Keep it in view, per M3 — an off-screen indicator is invisible to everyone.

Tab into the first one below to see the focus ring; the last pair shows the announce-the-result pattern — a live region you own, next to the indicator you remove.

Focus ring, specific labels, and the result you announce yourself

focus

label

result

Your app announces "12 invoices found" here — the component cannot.

Show code for each technology

HTML React Angular Vue Svelte

Copy

<!-- index.html — register the AWC UI elements once -->
<script type="module">
  import '@awc-ui/core/define';
</script>

<div style="display: grid; grid-template-columns: auto 1fr; gap: 14px 16px; align-items: center;">
  <span style="inline-size: 3.5rem; opacity: .65; font-size: .75rem; font-family: ui-monospace, monospace;">focus</span>
  <div style="display: flex; gap: 20px; flex-wrap: wrap; align-items: center;">
    <md-loading-indicator tabindex="0" label="Refreshing messages"></md-loading-indicator>
    <md-loading-indicator variant="contained" tabindex="0" label="Refreshing messages"></md-loading-indicator>
  </div>
  <span style="inline-size: 3.5rem; opacity: .65; font-size: .75rem; font-family: ui-monospace, monospace;">label</span>
  <div style="display: flex; gap: 20px; flex-wrap: wrap; align-items: center;">
    <md-loading-indicator label="Loading"></md-loading-indicator>
    <md-loading-indicator label="Refreshing messages"></md-loading-indicator>
  </div>
  <span style="inline-size: 3.5rem; opacity: .65; font-size: .75rem; font-family: ui-monospace, monospace;">result</span>
  <div style="display: flex; gap: 20px; flex-wrap: wrap; align-items: center;">
    <md-loading-indicator label="Searching invoices"></md-loading-indicator>
    <output role="status" style="font: 400 14px/1.4 system-ui, sans-serif; color: var(--md-sys-color-on-surface-variant);">Your app announces "12 invoices found" here — the component cannot.</output>
  </div>
</div>

Copy

import { MdLoadingIndicator } from '@awc-ui/react';

export function Demo() {
  return (
    <>
      <div style={{ display: 'grid', gridTemplateColumns: 'auto 1fr', gap: '14px 16px', alignItems: 'center' }}>
        <span style={{ inlineSize: '3.5rem', opacity: '.65', fontSize: '.75rem', fontFamily: 'ui-monospace, monospace' }}>focus</span>
        <div style={{ display: 'flex', gap: '20px', flexWrap: 'wrap', alignItems: 'center' }}>
          <MdLoadingIndicator tabIndex="0" label="Refreshing messages"></MdLoadingIndicator>
          <MdLoadingIndicator variant="contained" tabIndex="0" label="Refreshing messages"></MdLoadingIndicator>
        </div>
        <span style={{ inlineSize: '3.5rem', opacity: '.65', fontSize: '.75rem', fontFamily: 'ui-monospace, monospace' }}>label</span>
        <div style={{ display: 'flex', gap: '20px', flexWrap: 'wrap', alignItems: 'center' }}>
          <MdLoadingIndicator label="Loading"></MdLoadingIndicator>
          <MdLoadingIndicator label="Refreshing messages"></MdLoadingIndicator>
        </div>
        <span style={{ inlineSize: '3.5rem', opacity: '.65', fontSize: '.75rem', fontFamily: 'ui-monospace, monospace' }}>result</span>
        <div style={{ display: 'flex', gap: '20px', flexWrap: 'wrap', alignItems: 'center' }}>
          <MdLoadingIndicator label="Searching invoices"></MdLoadingIndicator>
          <output role="status" style={{ font: '400 14px/1.4 system-ui, sans-serif', color: 'var(--md-sys-color-on-surface-variant)' }}>Your app announces "12 invoices found" here — the component cannot.</output>
        </div>
      </div>
    </>
  );
}

Copy

// app.module.ts — register the AWC UI elements once
import { CUSTOM_ELEMENTS_SCHEMA, NgModule } from '@angular/core';
import { AwcUiModule } from '@awc-ui/angular';

@NgModule({
  imports: [AwcUiModule],
  schemas: [CUSTOM_ELEMENTS_SCHEMA],
})
export class AppModule {}

<!-- app.component.html -->
<div style="display: grid; grid-template-columns: auto 1fr; gap: 14px 16px; align-items: center;">
  <span style="inline-size: 3.5rem; opacity: .65; font-size: .75rem; font-family: ui-monospace, monospace;">focus</span>
  <div style="display: flex; gap: 20px; flex-wrap: wrap; align-items: center;">
    <md-loading-indicator tabindex="0" label="Refreshing messages"></md-loading-indicator>
    <md-loading-indicator variant="contained" tabindex="0" label="Refreshing messages"></md-loading-indicator>
  </div>
  <span style="inline-size: 3.5rem; opacity: .65; font-size: .75rem; font-family: ui-monospace, monospace;">label</span>
  <div style="display: flex; gap: 20px; flex-wrap: wrap; align-items: center;">
    <md-loading-indicator label="Loading"></md-loading-indicator>
    <md-loading-indicator label="Refreshing messages"></md-loading-indicator>
  </div>
  <span style="inline-size: 3.5rem; opacity: .65; font-size: .75rem; font-family: ui-monospace, monospace;">result</span>
  <div style="display: flex; gap: 20px; flex-wrap: wrap; align-items: center;">
    <md-loading-indicator label="Searching invoices"></md-loading-indicator>
    <output role="status" style="font: 400 14px/1.4 system-ui, sans-serif; color: var(--md-sys-color-on-surface-variant);">Your app announces "12 invoices found" here — the component cannot.</output>
  </div>
</div>

Copy

<script setup>
import '@awc-ui/core/define';
</script>

<template>
  <div style="display: grid; grid-template-columns: auto 1fr; gap: 14px 16px; align-items: center;">
    <span style="inline-size: 3.5rem; opacity: .65; font-size: .75rem; font-family: ui-monospace, monospace;">focus</span>
    <div style="display: flex; gap: 20px; flex-wrap: wrap; align-items: center;">
      <md-loading-indicator tabindex="0" label="Refreshing messages"></md-loading-indicator>
      <md-loading-indicator variant="contained" tabindex="0" label="Refreshing messages"></md-loading-indicator>
    </div>
    <span style="inline-size: 3.5rem; opacity: .65; font-size: .75rem; font-family: ui-monospace, monospace;">label</span>
    <div style="display: flex; gap: 20px; flex-wrap: wrap; align-items: center;">
      <md-loading-indicator label="Loading"></md-loading-indicator>
      <md-loading-indicator label="Refreshing messages"></md-loading-indicator>
    </div>
    <span style="inline-size: 3.5rem; opacity: .65; font-size: .75rem; font-family: ui-monospace, monospace;">result</span>
    <div style="display: flex; gap: 20px; flex-wrap: wrap; align-items: center;">
      <md-loading-indicator label="Searching invoices"></md-loading-indicator>
      <output role="status" style="font: 400 14px/1.4 system-ui, sans-serif; color: var(--md-sys-color-on-surface-variant);">Your app announces "12 invoices found" here — the component cannot.</output>
    </div>
  </div>
</template>

Copy

<script>
  import '@awc-ui/core/define';
</script>

<div style="display: grid; grid-template-columns: auto 1fr; gap: 14px 16px; align-items: center;">
  <span style="inline-size: 3.5rem; opacity: .65; font-size: .75rem; font-family: ui-monospace, monospace;">focus</span>
  <div style="display: flex; gap: 20px; flex-wrap: wrap; align-items: center;">
    <md-loading-indicator tabindex="0" label="Refreshing messages"></md-loading-indicator>
    <md-loading-indicator variant="contained" tabindex="0" label="Refreshing messages"></md-loading-indicator>
  </div>
  <span style="inline-size: 3.5rem; opacity: .65; font-size: .75rem; font-family: ui-monospace, monospace;">label</span>
  <div style="display: flex; gap: 20px; flex-wrap: wrap; align-items: center;">
    <md-loading-indicator label="Loading"></md-loading-indicator>
    <md-loading-indicator label="Refreshing messages"></md-loading-indicator>
  </div>
  <span style="inline-size: 3.5rem; opacity: .65; font-size: .75rem; font-family: ui-monospace, monospace;">result</span>
  <div style="display: flex; gap: 20px; flex-wrap: wrap; align-items: center;">
    <md-loading-indicator label="Searching invoices"></md-loading-indicator>
    <output role="status" style="font: 400 14px/1.4 system-ui, sans-serif; color: var(--md-sys-color-on-surface-variant);">Your app announces "12 invoices found" here — the component cannot.</output>
  </div>
</div>

The middle row is the one to copy from: "Loading" is a default, not a decision. Anything that names the work — “Refreshing messages”, “Searching invoices” — tells a screen-reader user what is actually taking time.

RTL, density & i18n

RTL — the morph is radially symmetric and the component is a single centred box, so there is nothing to flip. dir still matters for the text you put next to it, which is where the mirroring actually happens. See RTL.

<div dir="rtl">
  <md-loading-indicator variant="contained" label="جارٍ التحميل"></md-loading-indicator>
</div>

The two rows below share one markup structure — same elements, same order, same styles; only dir and the translated strings differ. Nothing about the indicator is re-authored, and the text beside it moves to the other edge on its own:

Same markup, dir=ltr vs dir=rtl

ltr

Loading results…

rtl

…جارٍ تحميل النتائج

Show code for each technology

HTML React Angular Vue Svelte

Copy

<!-- index.html — register the AWC UI elements once -->
<script type="module">
  import '@awc-ui/core/define';
</script>

<div style="display: grid; grid-template-columns: auto 1fr; gap: 14px 16px; align-items: center;">
  <span style="inline-size: 3.5rem; opacity: .65; font-size: .75rem; font-family: ui-monospace, monospace;">ltr</span>
  <div dir="ltr" style="display: flex; gap: 12px; flex-wrap: wrap; align-items: center; font: 400 14px/1.4 system-ui, sans-serif;">
    <md-loading-indicator label="Loading results"></md-loading-indicator>
    <span>Loading results…</span>
    <md-loading-indicator variant="contained" label="Refreshing"></md-loading-indicator>
  </div>
  <span style="inline-size: 3.5rem; opacity: .65; font-size: .75rem; font-family: ui-monospace, monospace;">rtl</span>
  <div dir="rtl" style="display: flex; gap: 12px; flex-wrap: wrap; align-items: center; font: 400 14px/1.4 system-ui, sans-serif;">
    <md-loading-indicator label="جارٍ تحميل النتائج"></md-loading-indicator>
    <span>…جارٍ تحميل النتائج</span>
    <md-loading-indicator variant="contained" label="جارٍ التحديث"></md-loading-indicator>
  </div>
</div>

Copy

import { MdLoadingIndicator } from '@awc-ui/react';

export function Demo() {
  return (
    <>
      <div style={{ display: 'grid', gridTemplateColumns: 'auto 1fr', gap: '14px 16px', alignItems: 'center' }}>
        <span style={{ inlineSize: '3.5rem', opacity: '.65', fontSize: '.75rem', fontFamily: 'ui-monospace, monospace' }}>ltr</span>
        <div dir="ltr" style={{ display: 'flex', gap: '12px', flexWrap: 'wrap', alignItems: 'center', font: '400 14px/1.4 system-ui, sans-serif' }}>
          <MdLoadingIndicator label="Loading results"></MdLoadingIndicator>
          <span>Loading results…</span>
          <MdLoadingIndicator variant="contained" label="Refreshing"></MdLoadingIndicator>
        </div>
        <span style={{ inlineSize: '3.5rem', opacity: '.65', fontSize: '.75rem', fontFamily: 'ui-monospace, monospace' }}>rtl</span>
        <div dir="rtl" style={{ display: 'flex', gap: '12px', flexWrap: 'wrap', alignItems: 'center', font: '400 14px/1.4 system-ui, sans-serif' }}>
          <MdLoadingIndicator label="جارٍ تحميل النتائج"></MdLoadingIndicator>
          <span>…جارٍ تحميل النتائج</span>
          <MdLoadingIndicator variant="contained" label="جارٍ التحديث"></MdLoadingIndicator>
        </div>
      </div>
    </>
  );
}

Copy

// app.module.ts — register the AWC UI elements once
import { CUSTOM_ELEMENTS_SCHEMA, NgModule } from '@angular/core';
import { AwcUiModule } from '@awc-ui/angular';

@NgModule({
  imports: [AwcUiModule],
  schemas: [CUSTOM_ELEMENTS_SCHEMA],
})
export class AppModule {}

<!-- app.component.html -->
<div style="display: grid; grid-template-columns: auto 1fr; gap: 14px 16px; align-items: center;">
  <span style="inline-size: 3.5rem; opacity: .65; font-size: .75rem; font-family: ui-monospace, monospace;">ltr</span>
  <div dir="ltr" style="display: flex; gap: 12px; flex-wrap: wrap; align-items: center; font: 400 14px/1.4 system-ui, sans-serif;">
    <md-loading-indicator label="Loading results"></md-loading-indicator>
    <span>Loading results…</span>
    <md-loading-indicator variant="contained" label="Refreshing"></md-loading-indicator>
  </div>
  <span style="inline-size: 3.5rem; opacity: .65; font-size: .75rem; font-family: ui-monospace, monospace;">rtl</span>
  <div dir="rtl" style="display: flex; gap: 12px; flex-wrap: wrap; align-items: center; font: 400 14px/1.4 system-ui, sans-serif;">
    <md-loading-indicator label="جارٍ تحميل النتائج"></md-loading-indicator>
    <span>…جارٍ تحميل النتائج</span>
    <md-loading-indicator variant="contained" label="جارٍ التحديث"></md-loading-indicator>
  </div>
</div>

Copy

<script setup>
import '@awc-ui/core/define';
</script>

<template>
  <div style="display: grid; grid-template-columns: auto 1fr; gap: 14px 16px; align-items: center;">
    <span style="inline-size: 3.5rem; opacity: .65; font-size: .75rem; font-family: ui-monospace, monospace;">ltr</span>
    <div dir="ltr" style="display: flex; gap: 12px; flex-wrap: wrap; align-items: center; font: 400 14px/1.4 system-ui, sans-serif;">
      <md-loading-indicator label="Loading results"></md-loading-indicator>
      <span>Loading results…</span>
      <md-loading-indicator variant="contained" label="Refreshing"></md-loading-indicator>
    </div>
    <span style="inline-size: 3.5rem; opacity: .65; font-size: .75rem; font-family: ui-monospace, monospace;">rtl</span>
    <div dir="rtl" style="display: flex; gap: 12px; flex-wrap: wrap; align-items: center; font: 400 14px/1.4 system-ui, sans-serif;">
      <md-loading-indicator label="جارٍ تحميل النتائج"></md-loading-indicator>
      <span>…جارٍ تحميل النتائج</span>
      <md-loading-indicator variant="contained" label="جارٍ التحديث"></md-loading-indicator>
    </div>
  </div>
</template>

Copy

<script>
  import '@awc-ui/core/define';
</script>

<div style="display: grid; grid-template-columns: auto 1fr; gap: 14px 16px; align-items: center;">
  <span style="inline-size: 3.5rem; opacity: .65; font-size: .75rem; font-family: ui-monospace, monospace;">ltr</span>
  <div dir="ltr" style="display: flex; gap: 12px; flex-wrap: wrap; align-items: center; font: 400 14px/1.4 system-ui, sans-serif;">
    <md-loading-indicator label="Loading results"></md-loading-indicator>
    <span>Loading results…</span>
    <md-loading-indicator variant="contained" label="Refreshing"></md-loading-indicator>
  </div>
  <span style="inline-size: 3.5rem; opacity: .65; font-size: .75rem; font-family: ui-monospace, monospace;">rtl</span>
  <div dir="rtl" style="display: flex; gap: 12px; flex-wrap: wrap; align-items: center; font: 400 14px/1.4 system-ui, sans-serif;">
    <md-loading-indicator label="جارٍ تحميل النتائج"></md-loading-indicator>
    <span>…جارٍ تحميل النتائج</span>
    <md-loading-indicator variant="contained" label="جارٍ التحديث"></md-loading-indicator>
  </div>
</div>

The indicator never flips — your spacing does

There is no mirror-icon here and nothing to mirror: the morph is radially symmetric, so the only thing RTL can get wrong is the gap you put between the indicator and its text. Space it with a logical property and the gap follows the direction; hard-code margin-right and it lands on the outside edge, with the label jammed against the shape. Both rows below are dir="rtl":

margin-inline-end follows dir; margin-right does not

correct

…جارٍ تحميل النتائج

wrong

…جارٍ تحميل النتائج

Show code for each technology

HTML React Angular Vue Svelte

Copy

<!-- index.html — register the AWC UI elements once -->
<script type="module">
  import '@awc-ui/core/define';
</script>

<div style="display: grid; grid-template-columns: auto 1fr; gap: 14px 16px; align-items: center;">
  <span style="inline-size: 3.5rem; opacity: .65; font-size: .75rem; font-family: ui-monospace, monospace;">correct</span>
  <div dir="rtl" style="display: flex; gap: 0; flex-wrap: wrap; align-items: center; font: 400 14px/1.4 system-ui, sans-serif;">
    <md-loading-indicator label="جارٍ التحميل" style="margin-inline-end: 12px;"></md-loading-indicator>
    <span>…جارٍ تحميل النتائج</span>
  </div>
  <span style="inline-size: 3.5rem; opacity: .65; font-size: .75rem; font-family: ui-monospace, monospace;">wrong</span>
  <div dir="rtl" style="display: flex; gap: 0; flex-wrap: wrap; align-items: center; font: 400 14px/1.4 system-ui, sans-serif;">
    <md-loading-indicator label="جارٍ التحميل" style="margin-right: 12px;"></md-loading-indicator>
    <span>…جارٍ تحميل النتائج</span>
  </div>
</div>

Copy

import { MdLoadingIndicator } from '@awc-ui/react';

export function Demo() {
  return (
    <>
      <div style={{ display: 'grid', gridTemplateColumns: 'auto 1fr', gap: '14px 16px', alignItems: 'center' }}>
        <span style={{ inlineSize: '3.5rem', opacity: '.65', fontSize: '.75rem', fontFamily: 'ui-monospace, monospace' }}>correct</span>
        <div dir="rtl" style={{ display: 'flex', gap: '0', flexWrap: 'wrap', alignItems: 'center', font: '400 14px/1.4 system-ui, sans-serif' }}>
          <MdLoadingIndicator label="جارٍ التحميل" style={{ marginInlineEnd: '12px' }}></MdLoadingIndicator>
          <span>…جارٍ تحميل النتائج</span>
        </div>
        <span style={{ inlineSize: '3.5rem', opacity: '.65', fontSize: '.75rem', fontFamily: 'ui-monospace, monospace' }}>wrong</span>
        <div dir="rtl" style={{ display: 'flex', gap: '0', flexWrap: 'wrap', alignItems: 'center', font: '400 14px/1.4 system-ui, sans-serif' }}>
          <MdLoadingIndicator label="جارٍ التحميل" style={{ marginRight: '12px' }}></MdLoadingIndicator>
          <span>…جارٍ تحميل النتائج</span>
        </div>
      </div>
    </>
  );
}

Copy

// app.module.ts — register the AWC UI elements once
import { CUSTOM_ELEMENTS_SCHEMA, NgModule } from '@angular/core';
import { AwcUiModule } from '@awc-ui/angular';

@NgModule({
  imports: [AwcUiModule],
  schemas: [CUSTOM_ELEMENTS_SCHEMA],
})
export class AppModule {}

<!-- app.component.html -->
<div style="display: grid; grid-template-columns: auto 1fr; gap: 14px 16px; align-items: center;">
  <span style="inline-size: 3.5rem; opacity: .65; font-size: .75rem; font-family: ui-monospace, monospace;">correct</span>
  <div dir="rtl" style="display: flex; gap: 0; flex-wrap: wrap; align-items: center; font: 400 14px/1.4 system-ui, sans-serif;">
    <md-loading-indicator label="جارٍ التحميل" style="margin-inline-end: 12px;"></md-loading-indicator>
    <span>…جارٍ تحميل النتائج</span>
  </div>
  <span style="inline-size: 3.5rem; opacity: .65; font-size: .75rem; font-family: ui-monospace, monospace;">wrong</span>
  <div dir="rtl" style="display: flex; gap: 0; flex-wrap: wrap; align-items: center; font: 400 14px/1.4 system-ui, sans-serif;">
    <md-loading-indicator label="جارٍ التحميل" style="margin-right: 12px;"></md-loading-indicator>
    <span>…جارٍ تحميل النتائج</span>
  </div>
</div>

Copy

<script setup>
import '@awc-ui/core/define';
</script>

<template>
  <div style="display: grid; grid-template-columns: auto 1fr; gap: 14px 16px; align-items: center;">
    <span style="inline-size: 3.5rem; opacity: .65; font-size: .75rem; font-family: ui-monospace, monospace;">correct</span>
    <div dir="rtl" style="display: flex; gap: 0; flex-wrap: wrap; align-items: center; font: 400 14px/1.4 system-ui, sans-serif;">
      <md-loading-indicator label="جارٍ التحميل" style="margin-inline-end: 12px;"></md-loading-indicator>
      <span>…جارٍ تحميل النتائج</span>
    </div>
    <span style="inline-size: 3.5rem; opacity: .65; font-size: .75rem; font-family: ui-monospace, monospace;">wrong</span>
    <div dir="rtl" style="display: flex; gap: 0; flex-wrap: wrap; align-items: center; font: 400 14px/1.4 system-ui, sans-serif;">
      <md-loading-indicator label="جارٍ التحميل" style="margin-right: 12px;"></md-loading-indicator>
      <span>…جارٍ تحميل النتائج</span>
    </div>
  </div>
</template>

Copy

<script>
  import '@awc-ui/core/define';
</script>

<div style="display: grid; grid-template-columns: auto 1fr; gap: 14px 16px; align-items: center;">
  <span style="inline-size: 3.5rem; opacity: .65; font-size: .75rem; font-family: ui-monospace, monospace;">correct</span>
  <div dir="rtl" style="display: flex; gap: 0; flex-wrap: wrap; align-items: center; font: 400 14px/1.4 system-ui, sans-serif;">
    <md-loading-indicator label="جارٍ التحميل" style="margin-inline-end: 12px;"></md-loading-indicator>
    <span>…جارٍ تحميل النتائج</span>
  </div>
  <span style="inline-size: 3.5rem; opacity: .65; font-size: .75rem; font-family: ui-monospace, monospace;">wrong</span>
  <div dir="rtl" style="display: flex; gap: 0; flex-wrap: wrap; align-items: center; font: 400 14px/1.4 system-ui, sans-serif;">
    <md-loading-indicator label="جارٍ التحميل" style="margin-right: 12px;"></md-loading-indicator>
    <span>…جارٍ تحميل النتائج</span>
  </div>
</div>

Every density rung

density is a local override of the inherited data-density. One signal moves both boxes: the overall size steps 48 → 44 → 40 → 36 → 32px and the shape inside it 38 → 35 → 32 → 29 → 26px, so the proportion holds at every rung.

Density 0 through -4 — box and shape taper together, both variants

0

-1

-2

-3

-4

Show code for each technology

HTML React Angular Vue Svelte

Copy

<!-- index.html — register the AWC UI elements once -->
<script type="module">
  import '@awc-ui/core/define';
</script>

<div style="display: grid; grid-template-columns: auto 1fr; gap: 14px 16px; align-items: center;">
  <span style="inline-size: 3.5rem; opacity: .65; font-size: .75rem; font-family: ui-monospace, monospace;">0</span>
  <div style="display: flex; gap: 20px; flex-wrap: wrap; align-items: center;"><md-loading-indicator density="0" label="Loading, rung 0"></md-loading-indicator><md-loading-indicator variant="contained" density="0" label="Loading, rung 0"></md-loading-indicator></div>
  <span style="inline-size: 3.5rem; opacity: .65; font-size: .75rem; font-family: ui-monospace, monospace;">-1</span>
  <div style="display: flex; gap: 20px; flex-wrap: wrap; align-items: center;"><md-loading-indicator density="-1" label="Loading, rung -1"></md-loading-indicator><md-loading-indicator variant="contained" density="-1" label="Loading, rung -1"></md-loading-indicator></div>
  <span style="inline-size: 3.5rem; opacity: .65; font-size: .75rem; font-family: ui-monospace, monospace;">-2</span>
  <div style="display: flex; gap: 20px; flex-wrap: wrap; align-items: center;"><md-loading-indicator density="-2" label="Loading, rung -2"></md-loading-indicator><md-loading-indicator variant="contained" density="-2" label="Loading, rung -2"></md-loading-indicator></div>
  <span style="inline-size: 3.5rem; opacity: .65; font-size: .75rem; font-family: ui-monospace, monospace;">-3</span>
  <div style="display: flex; gap: 20px; flex-wrap: wrap; align-items: center;"><md-loading-indicator density="-3" label="Loading, rung -3"></md-loading-indicator><md-loading-indicator variant="contained" density="-3" label="Loading, rung -3"></md-loading-indicator></div>
  <span style="inline-size: 3.5rem; opacity: .65; font-size: .75rem; font-family: ui-monospace, monospace;">-4</span>
  <div style="display: flex; gap: 20px; flex-wrap: wrap; align-items: center;"><md-loading-indicator density="-4" label="Loading, rung -4"></md-loading-indicator><md-loading-indicator variant="contained" density="-4" label="Loading, rung -4"></md-loading-indicator></div>
</div>

Copy

import { MdLoadingIndicator } from '@awc-ui/react';

export function Demo() {
  return (
    <>
      <div style={{ display: 'grid', gridTemplateColumns: 'auto 1fr', gap: '14px 16px', alignItems: 'center' }}>
        <span style={{ inlineSize: '3.5rem', opacity: '.65', fontSize: '.75rem', fontFamily: 'ui-monospace, monospace' }}>0</span>
        <div style={{ display: 'flex', gap: '20px', flexWrap: 'wrap', alignItems: 'center' }}><MdLoadingIndicator density="0" label="Loading, rung 0"></MdLoadingIndicator><MdLoadingIndicator variant="contained" density="0" label="Loading, rung 0"></MdLoadingIndicator></div>
        <span style={{ inlineSize: '3.5rem', opacity: '.65', fontSize: '.75rem', fontFamily: 'ui-monospace, monospace' }}>-1</span>
        <div style={{ display: 'flex', gap: '20px', flexWrap: 'wrap', alignItems: 'center' }}><MdLoadingIndicator density="-1" label="Loading, rung -1"></MdLoadingIndicator><MdLoadingIndicator variant="contained" density="-1" label="Loading, rung -1"></MdLoadingIndicator></div>
        <span style={{ inlineSize: '3.5rem', opacity: '.65', fontSize: '.75rem', fontFamily: 'ui-monospace, monospace' }}>-2</span>
        <div style={{ display: 'flex', gap: '20px', flexWrap: 'wrap', alignItems: 'center' }}><MdLoadingIndicator density="-2" label="Loading, rung -2"></MdLoadingIndicator><MdLoadingIndicator variant="contained" density="-2" label="Loading, rung -2"></MdLoadingIndicator></div>
        <span style={{ inlineSize: '3.5rem', opacity: '.65', fontSize: '.75rem', fontFamily: 'ui-monospace, monospace' }}>-3</span>
        <div style={{ display: 'flex', gap: '20px', flexWrap: 'wrap', alignItems: 'center' }}><MdLoadingIndicator density="-3" label="Loading, rung -3"></MdLoadingIndicator><MdLoadingIndicator variant="contained" density="-3" label="Loading, rung -3"></MdLoadingIndicator></div>
        <span style={{ inlineSize: '3.5rem', opacity: '.65', fontSize: '.75rem', fontFamily: 'ui-monospace, monospace' }}>-4</span>
        <div style={{ display: 'flex', gap: '20px', flexWrap: 'wrap', alignItems: 'center' }}><MdLoadingIndicator density="-4" label="Loading, rung -4"></MdLoadingIndicator><MdLoadingIndicator variant="contained" density="-4" label="Loading, rung -4"></MdLoadingIndicator></div>
      </div>
    </>
  );
}

Copy

// app.module.ts — register the AWC UI elements once
import { CUSTOM_ELEMENTS_SCHEMA, NgModule } from '@angular/core';
import { AwcUiModule } from '@awc-ui/angular';

@NgModule({
  imports: [AwcUiModule],
  schemas: [CUSTOM_ELEMENTS_SCHEMA],
})
export class AppModule {}

<!-- app.component.html -->
<div style="display: grid; grid-template-columns: auto 1fr; gap: 14px 16px; align-items: center;">
  <span style="inline-size: 3.5rem; opacity: .65; font-size: .75rem; font-family: ui-monospace, monospace;">0</span>
  <div style="display: flex; gap: 20px; flex-wrap: wrap; align-items: center;"><md-loading-indicator density="0" label="Loading, rung 0"></md-loading-indicator><md-loading-indicator variant="contained" density="0" label="Loading, rung 0"></md-loading-indicator></div>
  <span style="inline-size: 3.5rem; opacity: .65; font-size: .75rem; font-family: ui-monospace, monospace;">-1</span>
  <div style="display: flex; gap: 20px; flex-wrap: wrap; align-items: center;"><md-loading-indicator density="-1" label="Loading, rung -1"></md-loading-indicator><md-loading-indicator variant="contained" density="-1" label="Loading, rung -1"></md-loading-indicator></div>
  <span style="inline-size: 3.5rem; opacity: .65; font-size: .75rem; font-family: ui-monospace, monospace;">-2</span>
  <div style="display: flex; gap: 20px; flex-wrap: wrap; align-items: center;"><md-loading-indicator density="-2" label="Loading, rung -2"></md-loading-indicator><md-loading-indicator variant="contained" density="-2" label="Loading, rung -2"></md-loading-indicator></div>
  <span style="inline-size: 3.5rem; opacity: .65; font-size: .75rem; font-family: ui-monospace, monospace;">-3</span>
  <div style="display: flex; gap: 20px; flex-wrap: wrap; align-items: center;"><md-loading-indicator density="-3" label="Loading, rung -3"></md-loading-indicator><md-loading-indicator variant="contained" density="-3" label="Loading, rung -3"></md-loading-indicator></div>
  <span style="inline-size: 3.5rem; opacity: .65; font-size: .75rem; font-family: ui-monospace, monospace;">-4</span>
  <div style="display: flex; gap: 20px; flex-wrap: wrap; align-items: center;"><md-loading-indicator density="-4" label="Loading, rung -4"></md-loading-indicator><md-loading-indicator variant="contained" density="-4" label="Loading, rung -4"></md-loading-indicator></div>
</div>

Copy

<script setup>
import '@awc-ui/core/define';
</script>

<template>
  <div style="display: grid; grid-template-columns: auto 1fr; gap: 14px 16px; align-items: center;">
    <span style="inline-size: 3.5rem; opacity: .65; font-size: .75rem; font-family: ui-monospace, monospace;">0</span>
    <div style="display: flex; gap: 20px; flex-wrap: wrap; align-items: center;"><md-loading-indicator density="0" label="Loading, rung 0"></md-loading-indicator><md-loading-indicator variant="contained" density="0" label="Loading, rung 0"></md-loading-indicator></div>
    <span style="inline-size: 3.5rem; opacity: .65; font-size: .75rem; font-family: ui-monospace, monospace;">-1</span>
    <div style="display: flex; gap: 20px; flex-wrap: wrap; align-items: center;"><md-loading-indicator density="-1" label="Loading, rung -1"></md-loading-indicator><md-loading-indicator variant="contained" density="-1" label="Loading, rung -1"></md-loading-indicator></div>
    <span style="inline-size: 3.5rem; opacity: .65; font-size: .75rem; font-family: ui-monospace, monospace;">-2</span>
    <div style="display: flex; gap: 20px; flex-wrap: wrap; align-items: center;"><md-loading-indicator density="-2" label="Loading, rung -2"></md-loading-indicator><md-loading-indicator variant="contained" density="-2" label="Loading, rung -2"></md-loading-indicator></div>
    <span style="inline-size: 3.5rem; opacity: .65; font-size: .75rem; font-family: ui-monospace, monospace;">-3</span>
    <div style="display: flex; gap: 20px; flex-wrap: wrap; align-items: center;"><md-loading-indicator density="-3" label="Loading, rung -3"></md-loading-indicator><md-loading-indicator variant="contained" density="-3" label="Loading, rung -3"></md-loading-indicator></div>
    <span style="inline-size: 3.5rem; opacity: .65; font-size: .75rem; font-family: ui-monospace, monospace;">-4</span>
    <div style="display: flex; gap: 20px; flex-wrap: wrap; align-items: center;"><md-loading-indicator density="-4" label="Loading, rung -4"></md-loading-indicator><md-loading-indicator variant="contained" density="-4" label="Loading, rung -4"></md-loading-indicator></div>
  </div>
</template>

Copy

<script>
  import '@awc-ui/core/define';
</script>

<div style="display: grid; grid-template-columns: auto 1fr; gap: 14px 16px; align-items: center;">
  <span style="inline-size: 3.5rem; opacity: .65; font-size: .75rem; font-family: ui-monospace, monospace;">0</span>
  <div style="display: flex; gap: 20px; flex-wrap: wrap; align-items: center;"><md-loading-indicator density="0" label="Loading, rung 0"></md-loading-indicator><md-loading-indicator variant="contained" density="0" label="Loading, rung 0"></md-loading-indicator></div>
  <span style="inline-size: 3.5rem; opacity: .65; font-size: .75rem; font-family: ui-monospace, monospace;">-1</span>
  <div style="display: flex; gap: 20px; flex-wrap: wrap; align-items: center;"><md-loading-indicator density="-1" label="Loading, rung -1"></md-loading-indicator><md-loading-indicator variant="contained" density="-1" label="Loading, rung -1"></md-loading-indicator></div>
  <span style="inline-size: 3.5rem; opacity: .65; font-size: .75rem; font-family: ui-monospace, monospace;">-2</span>
  <div style="display: flex; gap: 20px; flex-wrap: wrap; align-items: center;"><md-loading-indicator density="-2" label="Loading, rung -2"></md-loading-indicator><md-loading-indicator variant="contained" density="-2" label="Loading, rung -2"></md-loading-indicator></div>
  <span style="inline-size: 3.5rem; opacity: .65; font-size: .75rem; font-family: ui-monospace, monospace;">-3</span>
  <div style="display: flex; gap: 20px; flex-wrap: wrap; align-items: center;"><md-loading-indicator density="-3" label="Loading, rung -3"></md-loading-indicator><md-loading-indicator variant="contained" density="-3" label="Loading, rung -3"></md-loading-indicator></div>
  <span style="inline-size: 3.5rem; opacity: .65; font-size: .75rem; font-family: ui-monospace, monospace;">-4</span>
  <div style="display: flex; gap: 20px; flex-wrap: wrap; align-items: center;"><md-loading-indicator density="-4" label="Loading, rung -4"></md-loading-indicator><md-loading-indicator variant="contained" density="-4" label="Loading, rung -4"></md-loading-indicator></div>
</div>

The size properties silently defeat the ladder

The rung is the fallback: the box resolves to var(--md-loading-indicator-size, max(32px, calc(48px + <rung> * 4px))). Set the public property and it replaces the whole calc, so density stops moving that dimension — silently, because nothing errors. Set them only when you need a size the ladder does not reach, and then stop expecting the rung to do anything. See Density.

Density and direction together

The two are independent signals, so they compose without any extra wiring — a wrapper sets the rung for everything inside it, and any one indicator can take a tighter rung of its own.

density="0" is not an opt-out

Only -1 through -4 have a rule — there is deliberately no :host([density="0"]) and no [data-density="0"]. Because --md-sys-density-scale is an inherited custom property, an indicator written density="0" inside a data-density="-2" wrapper still inherits -2 and renders at 40px like its neighbours. To restore the default rung on one element, reset the signal directly: style="--md-sys-density-scale: 0".

dir=rtl with data-density=-2: two inherit, one tightens to -4, one resets the signal to 0

…جارٍ التحميل

Show code for each technology

HTML React Angular Vue Svelte

Copy

<!-- index.html — register the AWC UI elements once -->
<script type="module">
  import '@awc-ui/core/define';
</script>

<div dir="rtl" data-density="-2" style="display: flex; gap: 16px; flex-wrap: wrap; align-items: center; font: 400 14px/1.4 system-ui, sans-serif;">
  <md-loading-indicator label="جارٍ التحميل"></md-loading-indicator>
  <md-loading-indicator variant="contained" label="جارٍ التحديث"></md-loading-indicator>
  <span>…جارٍ التحميل</span>
  <md-loading-indicator density="-4" label="أكثر إحكاما"></md-loading-indicator>
  <md-loading-indicator label="افتراضي" style="--md-sys-density-scale: 0;"></md-loading-indicator>
</div>

Copy

import { MdLoadingIndicator } from '@awc-ui/react';

export function Demo() {
  return (
    <>
      <div dir="rtl" data-density="-2" style={{ display: 'flex', gap: '16px', flexWrap: 'wrap', alignItems: 'center', font: '400 14px/1.4 system-ui, sans-serif' }}>
        <MdLoadingIndicator label="جارٍ التحميل"></MdLoadingIndicator>
        <MdLoadingIndicator variant="contained" label="جارٍ التحديث"></MdLoadingIndicator>
        <span>…جارٍ التحميل</span>
        <MdLoadingIndicator density="-4" label="أكثر إحكاما"></MdLoadingIndicator>
        <MdLoadingIndicator label="افتراضي" style={{ '--md-sys-density-scale': '0' }}></MdLoadingIndicator>
      </div>
    </>
  );
}

Copy

// app.module.ts — register the AWC UI elements once
import { CUSTOM_ELEMENTS_SCHEMA, NgModule } from '@angular/core';
import { AwcUiModule } from '@awc-ui/angular';

@NgModule({
  imports: [AwcUiModule],
  schemas: [CUSTOM_ELEMENTS_SCHEMA],
})
export class AppModule {}

<!-- app.component.html -->
<div dir="rtl" data-density="-2" style="display: flex; gap: 16px; flex-wrap: wrap; align-items: center; font: 400 14px/1.4 system-ui, sans-serif;">
  <md-loading-indicator label="جارٍ التحميل"></md-loading-indicator>
  <md-loading-indicator variant="contained" label="جارٍ التحديث"></md-loading-indicator>
  <span>…جارٍ التحميل</span>
  <md-loading-indicator density="-4" label="أكثر إحكاما"></md-loading-indicator>
  <md-loading-indicator label="افتراضي" style="--md-sys-density-scale: 0;"></md-loading-indicator>
</div>

Copy

<script setup>
import '@awc-ui/core/define';
</script>

<template>
  <div dir="rtl" data-density="-2" style="display: flex; gap: 16px; flex-wrap: wrap; align-items: center; font: 400 14px/1.4 system-ui, sans-serif;">
    <md-loading-indicator label="جارٍ التحميل"></md-loading-indicator>
    <md-loading-indicator variant="contained" label="جارٍ التحديث"></md-loading-indicator>
    <span>…جارٍ التحميل</span>
    <md-loading-indicator density="-4" label="أكثر إحكاما"></md-loading-indicator>
    <md-loading-indicator label="افتراضي" style="--md-sys-density-scale: 0;"></md-loading-indicator>
  </div>
</template>

Copy

<script>
  import '@awc-ui/core/define';
</script>

<div dir="rtl" data-density="-2" style="display: flex; gap: 16px; flex-wrap: wrap; align-items: center; font: 400 14px/1.4 system-ui, sans-serif;">
  <md-loading-indicator label="جارٍ التحميل"></md-loading-indicator>
  <md-loading-indicator variant="contained" label="جارٍ التحديث"></md-loading-indicator>
  <span>…جارٍ التحميل</span>
  <md-loading-indicator density="-4" label="أكثر إحكاما"></md-loading-indicator>
  <md-loading-indicator label="افتراضي" style="--md-sys-density-scale: 0;"></md-loading-indicator>
</div>

Density — density="-1…-4" locally overrides the inherited data-density rung; 0 is the default value, not an override. See Density.

i18n — translate label. It is the accessible name, and the English default ships silently if you forget.

Theming

Custom property	Purpose	Default
--md-loading-indicator-color	Shape colour	primary, or on-primary-container on contained
--md-loading-indicator-size	Overall box	48px (density-scaled)
--md-loading-indicator-shape-size	Inner morphing shape	38px (density-scaled)
--md-loading-indicator-container-color	contained backdrop	primary-container
--md-loading-indicator-container-shape	contained corner radius	corner-full

Every one is a plain custom property, so a class, an inline style, or an ancestor rule all work — there is no themable API beyond the cascade.

Themed instances Open in Storybook

Show code for each technology

HTML React Angular Vue Svelte

Copy

<!-- index.html — register the AWC UI elements once -->
<script type="module">
  import '@awc-ui/core/define';
</script>

<md-loading-indicator label="Tertiary toned" style="--md-loading-indicator-color: var(--md-sys-color-tertiary);"></md-loading-indicator>
<md-loading-indicator label="Error toned" style="--md-loading-indicator-color: var(--md-sys-color-error);"></md-loading-indicator>
<md-loading-indicator variant="contained" label="Brand contained" style="--md-loading-indicator-color: #ffffff; --md-loading-indicator-container-color: #6200ee;"></md-loading-indicator>
<md-loading-indicator variant="contained" label="Squared container" style="--md-loading-indicator-container-color: var(--md-sys-color-secondary-container); --md-loading-indicator-container-shape: 8px;"></md-loading-indicator>
<md-loading-indicator label="Inline override" style="--md-loading-indicator-color: coral;"></md-loading-indicator>

Copy

import { MdLoadingIndicator } from '@awc-ui/react';

export function Demo() {
  return (
    <>
      <MdLoadingIndicator label="Tertiary toned" style={{ '--md-loading-indicator-color': 'var(--md-sys-color-tertiary)' }}></MdLoadingIndicator>
      <MdLoadingIndicator label="Error toned" style={{ '--md-loading-indicator-color': 'var(--md-sys-color-error)' }}></MdLoadingIndicator>
      <MdLoadingIndicator variant="contained" label="Brand contained" style={{ '--md-loading-indicator-color': '#ffffff', '--md-loading-indicator-container-color': '#6200ee' }}></MdLoadingIndicator>
      <MdLoadingIndicator variant="contained" label="Squared container" style={{ '--md-loading-indicator-container-color': 'var(--md-sys-color-secondary-container)', '--md-loading-indicator-container-shape': '8px' }}></MdLoadingIndicator>
      <MdLoadingIndicator label="Inline override" style={{ '--md-loading-indicator-color': 'coral' }}></MdLoadingIndicator>
    </>
  );
}

Copy

// app.module.ts — register the AWC UI elements once
import { CUSTOM_ELEMENTS_SCHEMA, NgModule } from '@angular/core';
import { AwcUiModule } from '@awc-ui/angular';

@NgModule({
  imports: [AwcUiModule],
  schemas: [CUSTOM_ELEMENTS_SCHEMA],
})
export class AppModule {}

<!-- app.component.html -->
<md-loading-indicator label="Tertiary toned" style="--md-loading-indicator-color: var(--md-sys-color-tertiary);"></md-loading-indicator>
<md-loading-indicator label="Error toned" style="--md-loading-indicator-color: var(--md-sys-color-error);"></md-loading-indicator>
<md-loading-indicator variant="contained" label="Brand contained" style="--md-loading-indicator-color: #ffffff; --md-loading-indicator-container-color: #6200ee;"></md-loading-indicator>
<md-loading-indicator variant="contained" label="Squared container" style="--md-loading-indicator-container-color: var(--md-sys-color-secondary-container); --md-loading-indicator-container-shape: 8px;"></md-loading-indicator>
<md-loading-indicator label="Inline override" style="--md-loading-indicator-color: coral;"></md-loading-indicator>

Copy

<script setup>
import '@awc-ui/core/define';
</script>

<template>
  <md-loading-indicator label="Tertiary toned" style="--md-loading-indicator-color: var(--md-sys-color-tertiary);"></md-loading-indicator>
  <md-loading-indicator label="Error toned" style="--md-loading-indicator-color: var(--md-sys-color-error);"></md-loading-indicator>
  <md-loading-indicator variant="contained" label="Brand contained" style="--md-loading-indicator-color: #ffffff; --md-loading-indicator-container-color: #6200ee;"></md-loading-indicator>
  <md-loading-indicator variant="contained" label="Squared container" style="--md-loading-indicator-container-color: var(--md-sys-color-secondary-container); --md-loading-indicator-container-shape: 8px;"></md-loading-indicator>
  <md-loading-indicator label="Inline override" style="--md-loading-indicator-color: coral;"></md-loading-indicator>
</template>

Copy

<script>
  import '@awc-ui/core/define';
</script>

<md-loading-indicator label="Tertiary toned" style="--md-loading-indicator-color: var(--md-sys-color-tertiary);"></md-loading-indicator>
<md-loading-indicator label="Error toned" style="--md-loading-indicator-color: var(--md-sys-color-error);"></md-loading-indicator>
<md-loading-indicator variant="contained" label="Brand contained" style="--md-loading-indicator-color: #ffffff; --md-loading-indicator-container-color: #6200ee;"></md-loading-indicator>
<md-loading-indicator variant="contained" label="Squared container" style="--md-loading-indicator-container-color: var(--md-sys-color-secondary-container); --md-loading-indicator-container-shape: 8px;"></md-loading-indicator>
<md-loading-indicator label="Inline override" style="--md-loading-indicator-color: coral;"></md-loading-indicator>

On contained, override the pair or neither

The shape colour does not follow the backdrop. Set --md-loading-indicator-container-color alone and the shape stays on on-primary-container, which was picked for the default container — against your new one the pair can fall below 3:1. Check any override in both themes; the dark-theme story is the counterpart to the demo above.

CSS part — shape, the morphing element itself. Use it for what a colour token cannot express: opacity, or a filter.

::part(shape) overrides

Show code for each technology

HTML React Angular Vue Svelte

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<!-- index.html — register the AWC UI elements once -->
<script type="module">
  import '@awc-ui/core/define';
</script>

<style>
  .low-opacity::part(shape) { opacity: 0.87; }
  .shadow-shape::part(shape) { filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.3)); }
</style>
<md-loading-indicator class="low-opacity" label="Reduced opacity"></md-loading-indicator>
<md-loading-indicator class="shadow-shape" label="Drop shadow"></md-loading-indicator>

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import { MdLoadingIndicator } from '@awc-ui/react';

export function Demo() {
  return (
    <>
      <style>
        .low-opacity::part(shape) { opacity: 0.87; }
        .shadow-shape::part(shape) { filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.3)); }
      </style>
      <MdLoadingIndicator className="low-opacity" label="Reduced opacity"></MdLoadingIndicator>
      <MdLoadingIndicator className="shadow-shape" label="Drop shadow"></MdLoadingIndicator>
    </>
  );
}

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// app.module.ts — register the AWC UI elements once
import { CUSTOM_ELEMENTS_SCHEMA, NgModule } from '@angular/core';
import { AwcUiModule } from '@awc-ui/angular';

@NgModule({
  imports: [AwcUiModule],
  schemas: [CUSTOM_ELEMENTS_SCHEMA],
})
export class AppModule {}

<!-- app.component.html -->
<style>
  .low-opacity::part(shape) { opacity: 0.87; }
  .shadow-shape::part(shape) { filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.3)); }
</style>
<md-loading-indicator class="low-opacity" label="Reduced opacity"></md-loading-indicator>
<md-loading-indicator class="shadow-shape" label="Drop shadow"></md-loading-indicator>

Copy

<script setup>
import '@awc-ui/core/define';
</script>

<template>
  <style>
    .low-opacity::part(shape) { opacity: 0.87; }
    .shadow-shape::part(shape) { filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.3)); }
  </style>
  <md-loading-indicator class="low-opacity" label="Reduced opacity"></md-loading-indicator>
  <md-loading-indicator class="shadow-shape" label="Drop shadow"></md-loading-indicator>
</template>

Copy

<script>
  import '@awc-ui/core/define';
</script>

<style>
  .low-opacity::part(shape) { opacity: 0.87; }
  .shadow-shape::part(shape) { filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.3)); }
</style>
<md-loading-indicator class="low-opacity" label="Reduced opacity"></md-loading-indicator>
<md-loading-indicator class="shadow-shape" label="Drop shadow"></md-loading-indicator>

md-loading-indicator::part(shape) {
  opacity: 0.87;
  filter: drop-shadow(0 2px 4px rgb(0 0 0 / 0.3));
}

Don’t reach for animation: none on the part

Every shape in the morph comes from a clip-path declared inside the keyframes; the element’s own rule declares none. Kill the animation and the clipping stops applying altogether, so what is left is the unclipped block — a plain square, not a resting shape. And you do not need it: prefers-reduced-motion is handled inside the component, which swaps the morph for a circle with a gentle opacity pulse. Writing your own reduced-motion rule overrides that with something worse.

Related

md-progress-indicator · md-skeleton · md-select · md-multi-select · md-autocomplete · md-search

AI / LLM Context

For AI Agents — md-loading-indicator

Two artefacts to give your AI agent so it generates correct UI with this component. The per-component spec answers "how do I use this exact tag?". The main-llm spec answers "which tag should I pick in the first place?".

Per-component

md-loading-indicator spec card

Identity · when to use / when NOT · decision cues · behavioural contract · do/don't · anti-patterns · full API. Paste into your agent when you're implementing with this component.

Copy specExpand view

Main-LLM spec

AWC UI Operator's Manual

System-prompt preamble · decision matrix · token reference · page recipes · anti-patterns. Paste into the system prompt at the start of a piece of work.

Open specExpand view

md-loading-indicator readme.md

Copy readme

# md-loading-indicator

<!-- llm:meta
tag: md-loading-indicator
category: status
status: md3-mapped
m3-guidelines: https://m3.material.io/components/loading-indicator/guidelines
form-associated: false
depends-on: none
used-by: md-autocomplete, md-button, md-multi-select, md-search, md-select
-->

**The M3 Expressive loading moment.** A morphing-shape indicator for
indeterminate waits — distinct from a progress indicator, which reports *how
far along* something is.

> Setup, theming, density and i18n are configured once for the whole library —
> see [`main-llm.md`](../../../../../main-llm.md) at the repo root.

---

## When to use

- An **indeterminate** wait where you cannot report progress: a refresh, a
  search, an initial fetch.
- Pull-to-refresh and similar whole-screen refresh moments.
- Inside pickers while options load (which is how `md-select`,
  `md-multi-select`, `md-autocomplete` and `md-search` use it).

## When NOT to use

| Situation | Use instead |
|---|---|
| You know how far along the operation is | `md-progress-indicator` (determinate) |
| Content whose shape is known | `md-skeleton` |
| A button working after a click | `md-button loading` |
| An operation that will become determinate | `md-progress-indicator` — M3 says don't transition *from* a loading indicator |
| A long background job not blocking the view | Linear `md-progress-indicator` |
| A picker that is fetching its own options | The picker's own `loading` prop (`md-select`, `md-multi-select`, `md-autocomplete`, `md-search`) |

## Decision cues

| Need | Setting |
|---|---|
| Bare indicator on an existing surface | `variant="uncontained"` (default) |
| Indicator with its own container/backdrop | `variant="contained"` |
| Screen-reader text | `label` (default `"Loading"`) |
| A different size | `--md-loading-indicator-size` (there is no `size` prop) |

## API contract

The authoritative, generated property table is at the bottom of this file. This
is the short form an implementer needs.

```html
<md-loading-indicator
  variant="uncontained|contained"   <!-- default: uncontained -->
  label="Loading"                   <!-- default: "Loading" -->
  density="-1|-2|-3|-4"             <!-- default: 0 (uncompacted) -->
></md-loading-indicator>
```

**Events** — none.

**Methods** — none.

**Slots** — none; the component renders no `<slot>`. It is a self-contained
graphic — put any caption in a sibling element.

**Parts** — `shape` (the morphing indicator shape).

### Behavioral contract worth knowing

- **Always indeterminate.** There is no `value`, `max` or `indeterminate` prop
  — that's the whole distinction from `md-progress-indicator`.
- Three props total, on purpose. There is **no `size` prop**: resize it with
  `--md-loading-indicator-size`, which also scales the inner shape (the shape
  is derived from the overall size, so you rarely need
  `--md-loading-indicator-shape-size` as well).
- `label` defaults to the English `"Loading"`. It is both the host's
  `aria-label` and the text of an internal visually-hidden `role="status"`
  element, so changing `label` while it is mounted re-announces politely.
- `variant="contained"` also swaps the shape colour to `on-primary-container`
  so it stays legible on the container fill.
- **Reduced motion is already handled.** Under
  `prefers-reduced-motion: reduce` the shape morph is replaced by a gentle
  opacity pulse on a circle — do not add your own gating.
- It has no timeout: it animates until you remove it. Always resolve it on
  error as well as on success.

---

## Do / Don't

Sourced from [M3 · Loading indicator · Guidelines](https://m3.material.io/components/loading-indicator/guidelines).

| ✅ Do | ❌ Don't |
|---|---|
| Keep the loading indicator **in view** until the activity completes | Don't let it scroll off-screen — that hides the status and implies the refresh belongs to one component rather than the screen |
| Transition from an **indeterminate progress indicator** to a determinate one | Avoid transitioning from a *loading indicator* to a determinate progress indicator |
| Use it for whole-screen refresh moments | Don't attach it to a single card when the whole screen is refreshing |
| Pick `md-progress-indicator` when you can measure progress | Don't use a loading indicator to avoid computing real progress |
| Remove it on failure and show an error | Don't leave it spinning forever |
| Localize `label` | Don't ship the English default |

---

## Patterns

```html
<!-- Whole-screen refresh, pinned in view -->
<div style="position: sticky; inset-block-start: 0; display: flex; justify-content: center;">
  <md-loading-indicator label="Refreshing"></md-loading-indicator>
</div>

<!-- Contained, over a surface -->
<md-loading-indicator variant="contained" label="Loading results">
</md-loading-indicator>

<!-- Larger: one custom property scales the whole thing -->
<md-loading-indicator label="Loading" style="--md-loading-indicator-size: 72px;">
</md-loading-indicator>

<!-- A picker fetching its own options uses its own loading prop -->
<md-select label="User" loading></md-select>
```

```html
<div id="host"></div>

<script type="module">
  const host = document.getElementById('host');
  const indicator = document.createElement('md-loading-indicator');
  indicator.label = 'Loading results';
  host.append(indicator);

  try {
    render(await fetchData());
  } catch {
    renderError();
  } finally {
    indicator.remove();          // success or failure — it has no timeout
  }
</script>
```

## Anti-patterns

| ❌ Wrong | ✅ Right | Why |
|---|---|---|
| Looking for a `value` prop | Use `md-progress-indicator` | This one is always indeterminate. |
| `size="48"` | `style="--md-loading-indicator-size: 48px"` | There is no `size` prop; the attribute is ignored. |
| Gating it yourself on `prefers-reduced-motion` | Leave it alone | The component already swaps to a pulse. |
| Swapping this for a determinate bar mid-operation | Start with an indeterminate `md-progress-indicator` | M3 explicitly discourages this transition. |
| Letting it scroll out of view during a refresh | Pin it (sticky/fixed) | M3 explicit rule. |
| Leaving it mounted after an error | Remove it in `finally` | It has no timeout. |
| One per card during a full-screen refresh | One for the screen | It misattributes the activity. |
| Using it where the content shape is known | `md-skeleton` | Better perceived performance. |
| Default English `label` in a localized app | Translate it | It's the accessible name. |
| Adding a spinner inside `md-button` | Use the button's `loading` prop | Already built in. |

## Accessibility, RTL, density, i18n

**Accessibility**
- The host carries `role="progressbar"`, `aria-label` (from `label`) and
  `aria-live="polite"`; an internal visually-hidden `role="status"` element
  repeats the label so it is announced without stealing focus.
- No `aria-valuenow` is published — correctly, since the wait is indeterminate.
- Make `label` specific ("Refreshing messages" beats "Loading").
- Because it's indeterminate, screen-reader users get no completion cue from
  the component: announce the **result** yourself when loading ends.
- Reduced motion is honoured internally (morph → opacity pulse), so you do not
  need to gate the component.
- Keep it in view, per M3 — an off-screen indicator is invisible to everyone.

**RTL** — the shape morph is radially symmetric and the host uses logical
sizing; nothing to flip.

**Density** — `density="-1…-4"` locally overrides the inherited `data-density`
rung, shrinking the default 48 px box (floor 32 px) and the shape with it. Rung
`0` is the uncompacted default and is inert — it does **not** opt an indicator
out of an inherited rung; for that, set `style="--md-sys-density-scale: 0"`.
An explicit `--md-loading-indicator-size` overrides density scaling entirely.

**i18n** — translate `label`.

## Related components

`md-progress-indicator` · `md-skeleton` · `md-select` · `md-multi-select` ·
`md-autocomplete` · `md-search`

## Theming

| Custom property | Purpose | Default |
|---|---|---|
| `--md-loading-indicator-color` | Shape colour | `--md-sys-color-primary` (`on-primary-container` when `contained`) |
| `--md-loading-indicator-size` | Overall box | `48px`, density-scaled, floor `32px` |
| `--md-loading-indicator-shape-size` | Inner morphing shape | `0.792 × size` (the M3 38/48 ratio) |
| `--md-loading-indicator-container-color` | `contained` backdrop | `--md-sys-color-primary-container` |
| `--md-loading-indicator-container-shape` | `contained` corner radius | `--md-sys-shape-corner-full` |

**CSS parts** — `shape`.

```css
md-loading-indicator.hero {
  --md-loading-indicator-size: 96px;
  --md-loading-indicator-color: var(--md-sys-color-tertiary);
}
```

<!-- Auto Generated Below -->


## Properties

| Property  | Attribute | Description                                                                                                                                                                                           | Type                           | Default         |
| --------- | --------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ------------------------------ | --------------- |
| `density` | `density` | Local density rung. Drives the same `--md-sys-density-scale` signal that a global `data-density` ancestor sets, so a local value simply overrides the inherited one. 0 = default, -4 = ultra-compact. | `-1 \| -2 \| -3 \| -4 \| 0`    | `0`             |
| `label`   | `label`   | Accessible label for screen readers                                                                                                                                                                   | `string`                       | `'Loading'`     |
| `variant` | `variant` | Visual style: uncontained (default) or contained (with background container)                                                                                                                          | `"contained" \| "uncontained"` | `'uncontained'` |


## Shadow Parts

| Part      | Description |
| --------- | ----------- |
| `"shape"` |             |


## Dependencies

### Used by

 - [md-autocomplete](../md-autocomplete)
 - [md-button](../md-button)
 - [md-multi-select](../md-multi-select)
 - [md-search](../md-search)
 - [md-select](../md-select)

### Graph
```mermaid
graph TD;
  md-autocomplete --> md-loading-indicator
  md-button --> md-loading-indicator
  md-multi-select --> md-loading-indicator
  md-search --> md-loading-indicator
  md-select --> md-loading-indicator
  style md-loading-indicator fill:#f9f,stroke:#333,stroke-width:4px
```

----------------------------------------------

*Built with [StencilJS](https://stenciljs.com/)*

AWC UI Operator’s Manual

Copy spec

# main-llm.md — AWC UI build director

<!-- llm:meta
role: director
audience: llm
library: "@awc-ui/core"
component-count: 57
sub-component-count: 24
manual-count: 81
per-component-docs: ./packages/core/src/components/<tag>/readme.md
-->

**You are building a web app with AWC UI, a Material Design 3 web-component
library.** This file is the entry point and the only document you need before
writing UI code. Everything here is self-contained: tokens, recipes,
composition rules and the ship checklist. Per-component detail lives in
`./packages/core/src/components/<tag>/readme.md` — e.g.
[`md-button`](./packages/core/src/components/md-button/readme.md).

Your job, in order:

1. **Interview** the user (§1). Do not skip it and do not guess.
2. **Lock the configuration** their answers imply (§2) and bootstrap it (§3–§4).
3. **Route every UI need through the decision matrix** (§5) — never pick a
   component by name-similarity.
4. **Load the component's readme.md before writing a single line of its
   markup** (§6). The file is
   `./packages/core/src/components/<tag>/readme.md` — read it in full, do not
   skim it, and do not write the markup from memory of a similar library. Each
   one has a `When NOT to use`, a `Do / Don't` table sourced from
   [m3.material.io](https://m3.material.io), and an `Anti-patterns` table of
   mistakes models actually make. If you are about to use three components,
   load all three readmes first.
5. **Check what nests inside what** (§7) and start from a recipe (§8) rather
   than from a blank page.
6. **Apply the universal rules** (§9) — the API, content and accessibility
   rules every component is bound by, and the ones §10 checks you against.
7. **Run the ship checklist** (§10) before declaring done.

**Fail closed.** If you cannot satisfy a step — no component fits, a token
doesn't exist, an accessible name has nowhere to come from — say so and ask.
Do not invent an `md-*` tag, a prop, or a token. If it is not in this file or
in the component's manual, it does not exist.

---

## §1 — Interview the user

Ask these **one at a time**, in this order. Each answer closes off decisions
downstream, so don't batch them into a wall of questions. Skip a question only
if the user has already answered it unprompted.

If the user says "just pick sensible defaults", use the **bold** option and tell
them what you chose.

### 1.1 Scope and shape

1. **What is the app?** One or two sentences — domain, primary job, who uses it.
2. **What kind of surface is it?**
   - Internal tool / admin console / dashboard
   - Data-heavy CRUD application
   - Consumer-facing product
   - Marketing or content site
   - Mobile-first / PWA
3. **Which framework?** React · Angular · Vue · Svelte · **plain HTML** ·
   Next · Nuxt · SvelteKit · Astro
4. **Does it server-render?** (SSR/SSG, or **client-only SPA**)
5. **Roughly how many distinct screens**, and what are the top 3?

### 1.2 Look and feel

6. **Density** — how much information per screen?
   - `0` — **default**, comfortable, touch-friendly
   - `-1` / `-2` — compact; typical for admin consoles
   - `-3` / `-4` — ultra-compact; dense data tables, trading/ops screens
7. **Theme** — light only, dark only, or **both with a user toggle**?
   Does it follow the OS preference?
8. **Brand color** — a seed/primary color, or **stock MD3 palette**?
9. **Expressive motion** — keep **ripple and shape-morph on** (default), or turn
   them off for a flatter, more utilitarian feel?
10. **Shape language** — **rounded** (MD3 default) or squared?

### 1.3 Internationalization

11. **How many locales**, and which?
12. **Any RTL locales** (Arabic, Hebrew, Farsi, Urdu)? — this changes layout
    verification and directional-icon handling.
13. **Which i18n engine?** (i18next, vue-i18n, ngx-translate, Paraglide, custom)
    Components are engine-agnostic — you localize in the consumer layer.
14. **Locale-formatted values** — dates, numbers, currency? Which locale drives
    `Intl`?

### 1.4 Data and forms

15. **Is there significant tabular data?** How many rows, and is it
    server-paged? (Drives how you page `md-table` — it holds the state, you
    supply each page of rows.)
16. **Are there charts?** Which questions should they answer?
17. **How heavy are the forms?** Validation rules, async validation, multi-step?
18. **Rich text editing anywhere?** — ⚠️ **AWC UI has no RTE component.** If yes,
    you must integrate a third-party editor (TipTap, Lexical, Quill) and style
    it to the MD3 tokens yourself. Confirm this with the user explicitly.

### 1.5 Constraints

19. **Accessibility target** — **WCAG 2.1 AA** (what the library is tested to),
    or stricter?
20. **Browser/device support floor?**
21. **Anything already decided** you must not change — existing design system,
    router, state library, CSS approach?

---

## §2 — Map answers to configuration

| Answer | What you set |
|---|---|
| Admin console / data-heavy | `data-density="-1"` or `-2` on `<html>`; prefer `size="xs"`/`"sm"` on actions |
| Consumer / marketing | leave density alone (`0` is the default); larger button sizes (`md`/`lg`) for CTAs |
| Mobile-first | `md-navigation-bar` + `md-fab`; avoid `md-navigation-rail`, `md-transfer-list`, wide tables |
| Desktop-first | `md-navigation-rail` or `md-app-bar`; rail over bottom bar |
| Dark mode | `data-theme="dark"` on `<html>`; wire a toggle, and mirror OS via `prefers-color-scheme` |
| Both themes with toggle | persist the choice; set the attribute before first paint to avoid a flash |
| Brand color | override the `--md-sys-color-*` roles in your own stylesheet, loaded after the tokens (§4.2) |
| Flat / utilitarian | `data-ripple="off"` and `data-shape-morph="off"` on `<html>` |
| Any RTL locale | `dir="rtl"` on `<html>`; add `mirror-icon` to `md-button`s with directional glyphs; swap the glyph name yourself everywhere else (§4.5) |
| Multiple locales | build a dictionary in the consumer layer and feed component text props from it; never hardcode strings in markup |
| `Intl`-formatted values | pass a `locale` prop where a component exposes one; format everything else before it reaches the component |
| SSR | import from `@awc-ui/core/hydrate` on the server; use the client/server wrappers in `@awc-ui/react` |
| Heavy forms | components are form-associated via `ElementInternals` — use a real `<form>`, `md-button type="submit"`, and native `required` (§4.7) |
| Rich text | integrate a third-party editor; there is no `md-rich-text` |

### 2.1 Global switches — the complete set

All are attributes on `<html>` (or any ancestor; the nearest one wins).

```html
<html
  lang="en"
  dir="ltr"                  <!-- or rtl -->
  data-theme="dark"          <!-- omit for light -->
  data-density="-1"          <!-- -1 … -4; see below -->
  data-ripple="off"          <!-- default on -->
  data-shape-morph="off"     <!-- default on -->
>
```

**`data-density="0"` is inert.** No `[density="0"]` rule exists — density `0` is
simply the base values on `:root`, and a `0` rule would pin them onto every
element (reflected props write `density="0"` almost everywhere) and break global
inheritance. So the *overriding* range is `-1 … -4`. To escape an inherited rung
for one subtree, reset the scale directly:

```css
.opt-out-of-density { --md-sys-density-scale: 0; }
```

Per-component overrides beat the global one: a `density` prop, or
`ripple="off"` / `shape-morph="off"` on the element. **53 of the 57 top-level
components expose a `density` prop.** The four that don't: `md-divider`,
`md-ripple`, `md-sparkline`, `md-tabs`. (Nine sub-components also lack one —
they inherit density from the parent that owns their layout.)

---

## §3 — Install and bootstrap

```bash
npm install @awc-ui/core
```

**Register everything (recommended).** Two imports, once per app entry — one
defines every component, one loads the tokens. Both come from `@awc-ui/core`
itself, so this path needs no second package:

```ts
import { defineCustomElements } from '@awc-ui/core/loader';
import '@awc-ui/core/css/tokens.css';

defineCustomElements(window);
```

`@awc-ui/core/css/tokens.css` is the complete, self-contained token sheet —
light and dark colour roles, shape, elevation, motion, typescale, spacing and
z-index. It is the same set documented in §4.1.

**One-line alternative.** `@awc-ui/core/define` does both steps in a single
import. It loads the package's own token sheet, so it needs nothing else
installed:

```ts
import '@awc-ui/core/define'; // defines every component + loads the token sheet
```

`define` is client-only (it eval-guards `window`) and, because it imports CSS,
it needs a bundler. Never import it into a server graph.

**Per-component registration**, for size-sensitive bundles — load the token
sheet once yourself:

```ts
import '@awc-ui/core/css/tokens.css';
import '@awc-ui/core/components/md-button';
import '@awc-ui/core/components/md-text-field';
```

**Framework wrappers** — use these instead of raw elements; they handle
registration, typed props, and event binding. Below the version floor, drop to
the raw custom elements and the `loader` import above.

| Framework | Package | Requires |
|---|---|---|
| React / Next | `@awc-ui/react` | React 18+ |
| Angular | `@awc-ui/angular` (`AwcUiModule`) | Angular 17+ |
| Vue / Nuxt | `@awc-ui/vue` | Vue 3 |
| Svelte / SvelteKit | `@awc-ui/svelte` | Svelte 4+ |
| Plain HTML / Astro | `@awc-ui/core/loader` | — |

**SSR** — `@awc-ui/core/hydrate` renders Declarative Shadow DOM on the server.
`@awc-ui/react` ships matching client/server wrappers. Keep `define` and
`loader` out of the server graph; both are browser entries.

**Fonts** — components expect Roboto and Material Symbols Outlined to be
available. The library does **not** inject them. Every `icon="…"` prop renders a
Material Symbols glyph inside shadow DOM, so the font must be registered at the
**document** level (font registration crosses shadow boundaries; class rules do
not — the components declare the class rule inside their own roots):

```html
<link rel="stylesheet" href="https://fonts.googleapis.com/css2?family=Material+Symbols+Outlined">
<link rel="stylesheet" href="https://fonts.googleapis.com/css2?family=Roboto:wght@400;500&display=swap">
```

To swap the whole library to a different Material Symbols cut, set
`--md-sys-icon-font-family` on `:root` and load the matching `@font-face`.

---

## §4 — Global configuration reference

### 4.1 The token system

All AWC UI styling resolves to design tokens. **Never hardcode hex colours,
pixel radii, shadows, or font stacks** — they break theming, dark mode, density
and RTL in one stroke. Every value below is a real custom property defined by
`@awc-ui/tokens`; you may read them, and you may override them.

#### Color roles

Light is the default; `[data-theme="dark"]` swaps the palette. Every role has a
matching `on-` role for content drawn on top of it.

| Token | Light | Dark | Typical usage |
|---|---|---|---|
| `--md-sys-color-primary` | `#6750A4` | `#D0BCFF` | Filled buttons, active states |
| `--md-sys-color-on-primary` | `#FFFFFF` | `#381E72` | Text/icons on primary |
| `--md-sys-color-primary-container` | `#EADDFF` | `#4F378B` | FAB, selected segments |
| `--md-sys-color-on-primary-container` | `#21005D` | `#EADDFF` | Text on primary-container |
| `--md-sys-color-secondary` | `#625B71` | `#CCC2DC` | Secondary accents |
| `--md-sys-color-secondary-container` | `#E8DEF8` | `#4A4458` | Tonal buttons, chips |
| `--md-sys-color-tertiary` | `#7D5260` | `#EFB8C8` | Tertiary accents |
| `--md-sys-color-tertiary-container` | `#FFD8E4` | `#633B48` | Tertiary surfaces |
| `--md-sys-color-error` | `#B3261E` | `#F2B8B5` | Error / destructive |
| `--md-sys-color-on-error` | `#FFFFFF` | `#601410` | Content on error |
| `--md-sys-color-error-container` | `#F9DEDC` | `#8C1D18` | Error surfaces |
| `--md-sys-color-surface` | `#FFFBFE` | `#1C1B1F` | Page / card background |
| `--md-sys-color-on-surface` | `#1C1B1F` | `#E6E1E5` | Body text |
| `--md-sys-color-surface-variant` | `#E7E0EC` | `#49454F` | Muted fills |
| `--md-sys-color-on-surface-variant` | `#49454F` | `#CAC4D0` | Secondary text, icons |
| `--md-sys-color-surface-container-lowest` | `#FFFFFF` | `#0F0D13` | Lowest surface tier |
| `--md-sys-color-surface-container-low` | `#F7F2FA` | `#1D1B20` | Card / elevated button bg |
| `--md-sys-color-surface-container` | `#F3EDF7` | `#211F26` | Default container tier |
| `--md-sys-color-surface-container-high` | `#ECE6F0` | `#2B2930` | Dialog / menu surfaces |
| `--md-sys-color-surface-container-highest` | `#E6E0E9` | `#36343B` | Highest surface tier |
| `--md-sys-color-outline` | `#79747E` | `#938F99` | Borders (3:1 contrast) |
| `--md-sys-color-outline-variant` | `#CAC4D0` | `#49454F` | Dividers (low contrast) |
| `--md-sys-color-inverse-surface` | `#313033` | `#E6E1E5` | Snackbar, inverse chips |
| `--md-sys-color-inverse-on-surface` | `#F4EFF4` | `#313033` | Content on inverse-surface |
| `--md-sys-color-scrim` | `#000000` | `#000000` | Modal scrims |

**Semantic status roles** — beyond the baseline M3 palette, the library adds
`success`, `warning` and `info`, each with `on-`, `-container` and
`on-…-container` companions, in both themes, AA-verified. Used by `md-chip`,
`md-badge`, `md-meter`, `md-status-dot`.

| Token | Light | Dark |
|---|---|---|
| `--md-sys-color-success` | `#2E6B4F` | `#9DD5B0` |
| `--md-sys-color-success-container` | `#B8F0CE` | `#14512F` |
| `--md-sys-color-warning` | `#7A5900` | `#EFC148` |
| `--md-sys-color-warning-container` | `#FFDF9B` | `#5C4200` |
| `--md-sys-color-info` | `#38608F` | `#A2C9FE` |
| `--md-sys-color-info-container` | `#D3E4FF` | `#1E4975` |

#### Shape tokens

| Token | Value | Typical usage |
|---|---|---|
| `--md-sys-shape-corner-none` | `0px` | Square edges |
| `--md-sys-shape-corner-extra-small` | `4px` | Snackbar, small chips |
| `--md-sys-shape-corner-small` | `8px` | Cards (outlined), small surfaces |
| `--md-sys-shape-corner-medium` | `12px` | Cards (default), inputs |
| `--md-sys-shape-corner-large` | `16px` | Dialogs, large cards |
| `--md-sys-shape-corner-extra-large` | `28px` | Bottom sheets |
| `--md-sys-shape-corner-full` | `9999px` | Buttons, chips, FAB |

Partial-corner variants also exist for surfaces that meet an edge:
`--md-sys-shape-corner-extra-small-top`, `-large-top`, `-large-end`,
`-extra-large-top`. Their values are four-value `border-radius` shorthands
(e.g. `16px 16px 0px 0px`), so assign them to `border-radius`, not to a single
corner.

#### Elevation tokens

`-0` is the keyword `none`; `-1` through `-5` are complete `box-shadow` values,
and those five are **re-declared with deeper shadows under `[data-theme="dark"]`**
— so always use the token rather than copying its value.

| Token | When |
|---|---|
| `--md-sys-elevation-0` | `none` — resting cards, flat surfaces |
| `--md-sys-elevation-1` | Elevated buttons and cards at rest |
| `--md-sys-elevation-2` | Hover bump |
| `--md-sys-elevation-3` | FAB, menus, dialogs at rest |
| `--md-sys-elevation-4` – `-5` | Reserved for the most prominent surfaces |

#### Motion tokens

Durations come in four families of four: `short1…4` (50/100/150/200ms),
`medium1…4` (250/300/350/400ms), `long1…4` (450/500/550/600ms), and
`extra-long1…4` (700/800/900/1000ms).

| Token | Value | When |
|---|---|---|
| `--md-sys-motion-duration-short2` | `100ms` | Buttons, ripples, state layers |
| `--md-sys-motion-duration-medium2` | `300ms` | Dialogs, sheets, menus |
| `--md-sys-motion-duration-long2` | `500ms` | Large surface transitions |
| `--md-sys-motion-duration-extra-long1` | `700ms` | Ambient / chart entrances |
| `--md-sys-motion-easing-standard` | `cubic-bezier(0.2, 0, 0, 1)` | Small utility transitions |
| `--md-sys-motion-easing-standard-accelerate` | `cubic-bezier(0.3, 0, 1, 1)` | Exits |
| `--md-sys-motion-easing-standard-decelerate` | `cubic-bezier(0, 0, 0, 1)` | Entrances |
| `--md-sys-motion-easing-emphasized` | `cubic-bezier(0.2, 0, 0, 1)` | Expressive transitions |
| `--md-sys-motion-easing-emphasized-accelerate` | `cubic-bezier(0.3, 0, 0.8, 0.15)` | Expressive exits |
| `--md-sys-motion-easing-emphasized-decelerate` | `cubic-bezier(0.05, 0.7, 0.1, 1)` | Expressive entrances |
| `--md-sys-motion-easing-linear` | `linear` | Progress, indeterminate loops |

> `--md-sys-motion-easing-emphasized` deliberately equals the standard curve:
> the full M3 emphasized curve is a two-phase path interpolator that CSS cannot
> express. The accelerate and decelerate halves *are* expressible, and are the
> ones to reach for.

MD3 Expressive also ships spring pairs, each an easing plus its natural
duration: `--md-sys-motion-spring-{spatial,effects}-{fast,default,slow}-easing`
and `…-duration`. Spatial = position/size/shape; effects = colour/opacity.

#### State-layer opacities

| Token | Value |
|---|---|
| `--md-sys-state-hover-state-layer-opacity` | `0.08` |
| `--md-sys-state-focus-state-layer-opacity` | `0.12` |
| `--md-sys-state-pressed-state-layer-opacity` | `0.12` |
| `--md-sys-state-dragged-state-layer-opacity` | `0.16` |
| `--md-sys-state-disabled-container-opacity` | `0.12` |
| `--md-sys-state-disabled-content-opacity` | `0.38` |

#### Typography, spacing and layering

- **Typescale** — `--md-sys-typescale-<role>-<size>-*` for
  `display`/`headline`/`title`/`label`/`body` × `large`/`medium`/`small`. Each
  role exposes `-font-family`, `-font-size`, `-line-height`, `-font-weight`,
  `-letter-spacing`, plus a `-font` shorthand
  (e.g. `--md-sys-typescale-headline-medium-font: 400 28px/36px Roboto, sans-serif`).
  Use the shorthand on the `font` property for headings you write yourself.
- **Spacing** — a 4px scale that tightens with density:
  `--md-sys-spacing-inset-{xs,sm,md,lg,xl}` (internal padding, 4/8/12/16/24px)
  and `--md-sys-spacing-gap-{xs,sm,md,lg}` (between siblings, 4/8/12/16px), plus
  `--md-sys-spacing-row-height` (`56px` at density 0).
- **Layering** — `--md-sys-z-index-app-bar` (100), `-navigation` (200),
  `-bottom-sheet` (300), `-popup` (1000), `-dialog-scrim` (1001), `-tooltip`
  (1500), `-snackbar` (2000). Use these instead of inventing z-indexes, or your
  overlay will land under a menu.

### 4.2 Theming and rebranding

To rebrand, redefine the role variables **after** the tokens stylesheet — both
themes, or dark mode inherits your light brand colour:

```css
:root {
  --md-sys-color-primary: #00629E;
  --md-sys-color-on-primary: #FFFFFF;
  --md-sys-color-primary-container: #CFE5FF;
  --md-sys-color-on-primary-container: #001D33;
}
[data-theme="dark"] {
  --md-sys-color-primary: #9BCBFF;
  --md-sys-color-on-primary: #003354;
  --md-sys-color-primary-container: #004A78;
  --md-sys-color-on-primary-container: #CFE5FF;
}
```

Per-component knobs are `--md-<component>-*` custom properties, listed in each
manual's Theming section (`--md-button-container-color`,
`--md-card-container-shape`, …). Prefer those over `::part()`, and prefer
`::part()` over reaching into shadow internals, which are unstable and will
break on any release.

**Overriding a colour role forfeits the library's contrast testing.** Re-verify
AA (4.5:1 text, 3:1 borders and dividers) after any palette change. The Theme
Generator at <https://awc-ui.dev/theme-generator> takes a seed colour, emits both
palettes as `--md-sys-color-*` overrides, and runs the WCAG checks live — use it
rather than hand-picking container and `on-` pairs.

### 4.3 Density

`data-density` steps `-1 → -4`; each rung trims ~4px of padding and touch
target, driving `--md-sys-density-scale` and the spacing tokens. `-4` is the
floor. Set it globally, override locally with the `density` prop. Do not go
below `-2` on touch-primary surfaces — you will break the 48px target.

Two details that bite:

- **`density="0"` does nothing** — see §2 for why, and for the
  `--md-sys-density-scale: 0` escape hatch.
- **`md-table` accepts two vocabularies**: the semantic `compact` / `standard` /
  `comfortable` (row heights 36 / 52 / 60px) *and* the numeric rungs. They
  compose — `density="compact"` inside a `data-density="-2"` region condenses
  further.

### 4.4 Dark mode

Set `data-theme="dark"` on `<html>` (or any ancestor — the nearest wins). The
tokens swap automatically and inherit across every shadow boundary; no
per-component code. To mirror the OS, read `prefers-color-scheme` and write the
attribute **before first paint**, or the page flashes light.

### 4.5 RTL

Layout is written with CSS logical properties, so it flips with `dir="rtl"`
without extra work. Two things still need you:

- **Directional glyphs do not flip.** Material Symbols are not auto-mirrored.
  `md-button` has a `mirror-icon` prop that mirrors its own leading/trailing
  glyph — set it on buttons using arrows, chevrons, `send`, `reply`, and leave
  it off for `add`, `search`, `favorite`. **`mirror-icon` exists only on
  `md-button`.** Everywhere else — `md-icon-button icon="…"`, `md-list-item`
  leading/trailing icons, `md-app-bar leading-icon` — swap the glyph name
  yourself (`arrow_back` ↔ `arrow_forward`).
- **Icon props you supply yourself** — e.g. `md-transfer-list`'s
  `move-right-icon` / `move-left-icon` / `move-all-*-icon` — must be swapped by
  you when the direction flips.

Never write physical CSS (`margin-left`, `padding-right`, `left`) around these
components. Use `margin-inline-start`, `padding-inline-end`, `inset-inline-end`.

### 4.6 Internationalization

Components are **i18n-engine-agnostic by design**. Every user-visible string is
either slotted content or a prop. Localize in the consumer layer: resolve your
dictionary to plain strings, then pass them in. Do not add a translation engine
inside a component. `locale` props exist only where a component computes an
`Intl`-formatted value itself: `md-date-picker`, `md-number-field`,
`md-meter`, `md-dialog`, and the charts (`md-bar-chart`, `md-line-chart`,
`md-area-chart`, `md-pie-chart`). `md-time-picker` has no
`locale` prop — it takes `format="12h" | "24h"` instead.

Templated strings keep their placeholder tokens when translated — translate
around the braces, don't remove them:

```html
<md-transfer-list count-template="{checked} / {total} ausgewählt"></md-transfer-list>
```

Other templated props: `md-autocomplete status-template`, `md-otp-field
cell-label-template`. Default prop values are English (`Search`, `Dismiss`,
`No results`, `Move selected to target`, …) — every one of them needs
translating in a localized app.

### 4.7 Forms and validation

Fourteen components are form-associated via `ElementInternals`, so they
participate in `FormData` and constraint validation like native controls:

`md-text-field` · `md-number-field` · `md-otp-field` · `md-select` ·
`md-multi-select` · `md-autocomplete` · `md-checkbox` · `md-radio` ·
`md-switch` · `md-slider` · `md-rating` · `md-date-picker` · `md-time-picker` ·
`md-button`

Rules:

- Use a real `<form>`. `md-button type="submit"` calls `form.requestSubmit()`
  (not `submit()`), so the `submit` event fires **and** built-in constraint
  validation runs. `required` genuinely blocks submit.
  `md-button type="reset"` calls `form.reset()`.
- Give every control a `name`, or it will not appear in `FormData`.
- Do **not** add hidden `<input>`s to mirror values — that's the old pattern and
  it double-submits.
- Validity changes are announced on a `mdValidityChange` event on the control.
  Error presentation is `error` + `error-text` on the field.
- Boolean state props differ by control — `md-checkbox` uses `checked`,
  `md-switch` uses **`selected`**, `md-select-option` uses `selected`. Check the
  manual; guessing `checked` on a switch silently does nothing.

---

## §5 — Component decision matrix

Route by **need**, not by name. If the need isn't listed, find the closest row
and read that component's `When NOT to use`.

### 5.1 Actions

| Need | Use | Don't use |
|---|---|---|
| Discrete labelled action | `md-button` | `md-chip`, raw `<button>` |
| Icon-only action | `md-icon-button` | `md-button` with no label |
| A destructive action | `md-button` + `md-dialog` to confirm | an unconfirmed `filled` button |
| The single most prominent screen action (mobile) | `md-fab` | a second `filled` `md-button` |
| One prominent action that expands to several | `md-fab-menu` + `md-fab-menu-item` | a stack of FABs |
| Primary action + variants of it | `md-split-button` | button + separate menu |
| 2–5 related actions as one unit | `md-button-group` | loose adjacent buttons |
| Mutually exclusive view/mode switch | `md-segmented-button-set` + `md-segmented-button` | radio buttons, tabs |
| Overflow / contextual actions | `md-menu` + `md-menu-item` | a row of text buttons |

### 5.2 Text input

| Need | Use | Don't use |
|---|---|---|
| Any single-line or multi-line text entry | `md-text-field` | raw `<input>` |
| A number with steppers and locale formatting | `md-number-field` | `md-text-field type="number"` |
| A one-time code / PIN | `md-otp-field` | a row of text fields |
| Text entry with suggestions | `md-autocomplete` | `md-select` |
| Site/app-wide search with a results surface | `md-search` | `md-text-field` with an icon |

### 5.3 Selection

| Need | Use | Don't use |
|---|---|---|
| One of many, from a list | `md-select` + `md-select-option` | radio group over ~7 options |
| One of few (2–5), all visible | `md-radio` | `md-select` |
| Several of many | `md-multi-select` | many `md-checkbox`es |
| Several of few, all visible | `md-checkbox` | `md-multi-select` |
| Instant on/off setting | `md-switch` | `md-checkbox` |
| A value in a numeric range | `md-slider` | `md-text-field type=number` |
| Subjective score | `md-rating` | slider |
| A color | `md-color-picker` | `<input type=color>` |
| Assign a subset from a bounded pool, side by side | `md-transfer-list` | two lists + buttons |
| Filter / attribute / removable entry | `md-chip` | small buttons |
| A date | `md-date-picker` | three selects |
| A time | `md-time-picker` | text field |

### 5.4 Navigation

| Need | Use | Don't use |
|---|---|---|
| Top-level destinations, mobile | `md-navigation-bar` + `md-navigation-tab` | tabs |
| Top-level destinations, desktop | `md-navigation-rail` + `md-navigation-rail-tab` | bottom bar |
| App header: title, actions, search | `md-app-bar` | a custom `<header>` |
| A dense action strip | `md-toolbar` | app bar |
| Sibling views **within** one screen | `md-tabs` + `md-tab` + `md-tab-panels` + `md-tab-panel` | navigation bar |
| Hierarchy / where-am-I | `md-breadcrumbs` + `md-breadcrumb-item` | text links |
| A linear multi-step flow | `md-stepper` + `md-step` | tabs |
| Contextual popup actions | `md-menu` + `md-menu-item`, `md-menu-item-group`, `md-sub-menu-item` | dialog |
| Hierarchical command menu (File → Export → PDF) | `md-menu` + `md-sub-menu-item` | nested dialogs |

### 5.5 Containment and feedback

| Need | Use | Don't use |
|---|---|---|
| Group related content | `md-card` | a bare `<div>` with a border |
| Blocking decision or focused task | `md-dialog` | a new page |
| Critical error the user must acknowledge | `md-dialog` | `md-snackbar` |
| Supplementary content from the bottom (mobile) | `md-bottom-sheet` | dialog |
| Supplementary content from the side (desktop) | `md-side-sheet` | dialog |
| Brief confirmation of an action, optionally undoable | `md-snackbar` | dialog, alert |
| Explain a control on hover/focus | `md-tooltip` | a dialog or inline hint |
| Progressive disclosure of sections | `md-accordion` + `md-accordion-item` | tabs |
| Visual separation | `md-divider` | a styled `<hr>` |
| A vertical set of records | `md-list` + `md-list-item` | a table |
| Determinate/indeterminate progress | `md-progress-indicator` | spinner GIF |
| Brand-consistent page/content loading | `md-loading-indicator` | custom spinner |
| Content-shaped loading placeholder | `md-skeleton` | a spinner over the whole page |
| Count or status on an element | `md-badge` | superscript text |
| Compact status dot | `md-status-dot` | a colored emoji |
| Read-only value within a known range (quota, battery) | `md-meter` | `md-progress-indicator` |
| A person or entity image/initials | `md-avatar` | a raw `<img>` |
| Touch feedback inside a custom control | `md-ripple` | custom CSS animation |

### 5.6 Data

| Need | Use | Don't use |
|---|---|---|
| Any table | `md-table-container` wrapping `md-table`, with `-head`/`-body`/`-row`/`-cell`/`-foot` inside the table and `-toolbar`/`-pagination` beside it in the container (§7.1) | a native `<table>` |
| Sorting, selection, paging on that table | the same parts — `md-table` carries the STATE (`sort-by`, `sort-order`, `selection`, `row-offset`, `row-count`, `loading`) and emits events; you own the data and do the actual sorting/paging | expecting it to sort an array for you |
| Hierarchy / reporting lines | `md-organization-chart` | nested lists |
| Compare categories | `md-bar-chart` | pie chart |
| Trend over time | `md-line-chart` | bar chart |
| Trend with cumulative volume | `md-area-chart` | line chart |
| Parts of a whole (≤ ~6 slices) | `md-pie-chart` | bar chart |
| Inline micro-trend in a cell or card | `md-sparkline` | a full chart |

> **There is no data-driven table component.** `md-table` is composable: you
> render the rows. It tracks and announces sort, selection and pagination state
> and emits events when the user changes them, but the sorting, filtering and
> slicing of your data is yours to perform. Render rows from your own array in
> response to those events.

### 5.7 Choosing the variant

The matrix picks the component; this picks its shape. Every value below is a
real enum member — anything not listed here is not a valid value.

| Component | Prop | Values, and when |
|---|---|---|
| `md-button` | `variant` | `filled` the one primary action · `tonal` a strong secondary · `outlined` secondary, and the safe choice for a destructive action behind a confirm · `text` low emphasis, dialog Cancel · `elevated` when it sits on a busy or coloured background (default `filled`) |
| `md-button` / `md-icon-button` / `md-button-group` | `size` | `xs` `sm` `md` `lg` `xl` — default `sm`; go `md`/`lg` for consumer CTAs, `xs`/`sm` for dense admin UI |
| `md-icon-button` | `variant` | `standard` (default) · `filled` · `tonal` · `outlined` |
| `md-button-group` | `variant` | `standard` spaced · `connected` fused into one bar |
| `md-fab` | `size` | `standard` (default) · `medium` · `large` |
| `md-fab` | `variant` | `primary-container` (default) · `secondary-container` · `tertiary-container` · `surface` · `primary` · `secondary` · `tertiary` |
| `md-card` | `variant` | `filled` for a group of comparable items · `elevated` (default) for a hero or featured item · `outlined` for a settings or form section |
| `md-text-field` / `md-select` | `variant` | `outlined` for forms on a surface · `filled` for dense or tinted layouts (`md-text-field` defaults to `filled`, `md-select` to `outlined`) — pick one and use it for every field on the screen |
| `md-text-field` | `type` | any native input type: `password`, `email`, `tel`, `url`, `search`, … (default `text`) |
| `md-text-field` | `multiline` | `"auto-grow"` grows with content · `"fixed"` with `rows` for a fixed comment box · `false` (default) single line |
| `md-search` | `variant` | `contained` (default) · `divided` |
| `md-app-bar` | `variant` | `small` (default) · `medium` · `large` for a prominent headline · `search` for a bar that hosts a field |
| `md-chip` | `variant` | `assist` (default) · `filter` for toggleable facets · `input` for user-entered removable values · `suggestion` |
| `md-chip` | `appearance` | `outlined` (default) · `filled` · `elevated` |
| `md-badge` | `variant` | `small` a bare dot · `large` (default) a count |
| `md-tooltip` | `variant` | `plain` (default) a short label on an icon control · `rich` an explanatory popover that may hold a link or action |
| `md-divider` | — | **no `variant`** — use the booleans `inset`, `inset-start`, `inset-end` |
| `md-side-sheet` | `variant` | `standard` coexists with page content · `modal` overlays with a scrim |
| `md-bottom-sheet` | `variant` | `standard` (default) · `detached` floating above the edge |
| `md-dialog` | `fullscreen` | boolean — a full-screen dialog for a long mobile task |
| `md-date-picker` | `variant` | `modal-input` (default) calendar plus a typed field · `modal` calendar only · `docked` inline, anchored to the field |
| `md-time-picker` | `variant` | `dial` · `input` (default) |
| `md-progress-indicator` | `variant` | `linear` (default) · `circular`; add `indeterminate` when the total is unknown |
| `md-list-item` | `lines` | `1` · `2` · `3` — must match how much supporting text you pass |
| `md-navigation-bar` | — | 3–5 destinations. Fewer than three: use `md-tabs`. More than five: a rail or a menu |
| `md-navigation-rail` | — | 3–7 destinations; cap the overflow with `max-visible` |

### 5.8 Not in the library

Rich text editor · file upload/dropzone · calendar/scheduler view · map ·
toast stack manager (use `md-snackbar` and manage the queue yourself) ·
data grid with virtualized columns. If the user needs one, say so plainly and
integrate a third-party component styled with the MD3 tokens.

**There is no `md-grid`, no `md-data-table`, no `md-layout`, no `md-icon`.**
If a tag is not listed in §6, it does not exist — do not emit it.

---

## §6 — Component inventory

**Every component has exactly one manual, and it is the readme.md in its own
source folder:**

```
./packages/core/src/components/<tag>/readme.md
```

e.g. [`md-select`](./packages/core/src/components/md-select/readme.md),
[`md-button`](./packages/core/src/components/md-button/readme.md).

**Load that file before you use the component.** There is no second, shorter
summary to rely on — this readme is the single source, so anything you do not
read there, you do not know. Each one carries When-to-use, a Do/Don't table
from M3, copy-paste patterns, an anti-patterns table, and the theming surface.

Work through them one at a time: pick the component from the decision matrix
(§5), load its readme, write that component's markup, then move to the next.

There are 81 manuals for 57 components: 24 of them document sub-components that
are only valid inside a parent (a table cell, a tab panel, a select option).
Every sub-component manual names its parent in the first line, and §7 below
summarises the nesting.

`status` in each manual's `llm:meta` block is one of:

- **`md3-mapped`** — has a Material Design 3 guidelines page; the Do/Don't is
  sourced from it.
- **`custom`** — an addition to MD3; guidance is derived house rules.
- **`sub-component`** — only valid inside a specific parent.

| Category | Components |
|---|---|
| Actions | `md-button` `md-icon-button` `md-fab` `md-fab-menu` `md-fab-menu-item` `md-split-button` `md-button-group` `md-segmented-button` `md-segmented-button-set` |
| Text input | `md-text-field` `md-number-field` `md-otp-field` `md-autocomplete` `md-search` |
| Selection | `md-select` `md-select-option` `md-multi-select` `md-checkbox` `md-radio` `md-switch` `md-slider` `md-rating` `md-color-picker` `md-transfer-list` `md-chip` |
| Pickers | `md-date-picker` `md-time-picker` |
| Navigation | `md-app-bar` `md-toolbar` `md-navigation-bar` `md-navigation-tab` `md-navigation-rail` `md-navigation-rail-tab` `md-tabs` `md-tab` `md-tab-panels` `md-tab-panel` `md-breadcrumbs` `md-breadcrumb-item` `md-menu` `md-menu-item` `md-menu-item-group` `md-sub-menu-item` `md-stepper` `md-step` |
| Containment | `md-card` `md-dialog` `md-bottom-sheet` `md-side-sheet` `md-snackbar` `md-tooltip` `md-accordion` `md-accordion-item` `md-divider` `md-list` `md-list-item` |
| Data | `md-table` `md-table-container` `md-table-head` `md-table-body` `md-table-row` `md-table-cell` `md-table-foot` `md-table-toolbar` `md-table-pagination` `md-table-sort-label` `md-table-expand-toggle` `md-organization-chart` |
| Charts | `md-bar-chart` `md-line-chart` `md-area-chart` `md-pie-chart` `md-sparkline` |
| Status & feedback | `md-progress-indicator` `md-loading-indicator` `md-skeleton` `md-badge` `md-status-dot` `md-meter` `md-avatar` `md-ripple` |

---

## §7 — Composition rules

### 7.1 What nests inside what

A sub-component is only valid inside its parent. Putting one anywhere else
produces an unstyled, unregistered-looking element with no keyboard behaviour,
because the parent is what wires roving tabindex, ARIA ids and selection.

| Parent | Children it manages |
|---|---|
| `md-button-group` | `md-button`, `md-icon-button` |
| `md-segmented-button-set` | `md-segmented-button` |
| `md-fab-menu` | `md-fab-menu-item` (anchored to an `md-fab` via `anchor="<id>"`) |
| `md-menu` | `md-menu-item`, `md-sub-menu-item`, `md-menu-item-group` — **not** `md-divider`; separate rows with `md-menu-item`'s own `divider` (or `gap`) prop |
| `md-menu-item-group` | `md-menu-item` |
| `md-sub-menu-item` | a nested `md-menu` in `slot="submenu"` — the items go in *that* menu. There is no default slot, so anything else you nest renders nothing |
| `md-select`, `md-multi-select`, `md-autocomplete` | `md-select-option` |
| `md-list` | `md-list-item`, `md-divider` |
| `md-tabs` | `md-tab` |
| `md-tab-panels` | `md-tab-panel` (one per tab, in tab order) |
| `md-navigation-bar` | `md-navigation-tab` |
| `md-navigation-rail` | `md-navigation-rail-tab`, plus an `md-fab` in `slot="fab"` |
| `md-accordion` | `md-accordion-item` |
| `md-stepper` | `md-step` (horizontal steppers also take `slot="content"`) |
| `md-breadcrumbs` | `md-breadcrumb-item` |
| `md-table-container` | `md-table` — **it wraps the table, not the other way round** — plus `md-table-toolbar` in `slot="top"` and `md-table-pagination` in `slot="bottom"`, which sit outside the scroll region |
| `md-table` | `md-table-head`, `md-table-body`, `md-table-foot` (and bare `md-table-row`). It does **not** accept the container, toolbar or pagination |
| `md-table-head` / `-body` / `-foot` | `md-table-row` |
| `md-table-row` | `md-table-cell`, plus `md-table-expand-toggle` for an expandable row |
| `md-table-cell` | `md-table-sort-label` in a header cell |
| `md-tooltip` | **its trigger** — the tooltip wraps the element it describes in its default slot |
| `md-dialog` | body content in the default slot; `md-button` in `slot="actions"` |
| `md-bottom-sheet` / `md-side-sheet` | content in the default slot; `md-button` in `slot="actions"`; headline in `slot="headline"` |
| `md-app-bar` | `md-icon-button` in `slot="leading"` and `slot="trailing"`; `md-menu` for overflow; a field in `slot="search"` on `variant="search"` |
| `md-toolbar` | `md-icon-button`, `md-button`, `md-button-group`; an `md-fab` in `slot="fab"`; `slot="leading"` / `slot="trailing"` for the end clusters |

### 7.2 Pairs that belong together

These don't nest — they sit next to each other in a working flow. Reaching for
one usually means you want the other.

| This | Goes with | Why |
|---|---|---|
| `md-icon-button` | `md-tooltip` | The tooltip supplies the visible meaning the icon lacks |
| `md-button` (`soft-disabled`) | `md-tooltip` | Explains *why* the action is unavailable |
| `md-fab` | `md-fab-menu` | The FAB is the menu's anchor |
| `md-split-button` | `md-menu` | The trailing half opens it |
| `md-card` | `md-button`, `md-icon-button`, `md-divider` | Footer actions, corner action, internal sections |
| `md-list-item` | `md-checkbox`, `md-switch`, `md-icon-button` | Trailing controls in a selectable or settings row |
| `md-bottom-sheet` / `md-side-sheet` | `md-list` | Action menus and filter panels inside the sheet |
| `md-search` | `md-list`, `md-avatar`, `md-icon-button` | Results in the panel; account and voice/filter affordances in the trailing slot |
| `md-date-picker` | `md-time-picker` | Date + time row for booking and scheduling forms |
| `md-time-picker` | `md-button` | The trigger, when `hide-trigger` is set. The picker **is** its own dialog — don't nest it in another one |
| `md-text-field` | `md-button` | Submit / cancel in the form footer |
| `md-multi-select` / `md-autocomplete` | `md-text-field`, `md-menu`, `md-chip` | The field is the trigger (and inherits its variant, density and error state), the menu is the option surface, chips are the selected values |
| `md-autocomplete` | `md-progress-indicator` | The loading row while suggestions are fetched |
| `md-transfer-list` | `md-checkbox`, `md-text-field`, `md-icon-button` | Per-row select, per-side search, mover controls |
| `md-number-field` | `md-text-field` hooks, `md-icon-button` | It *is* an `md-text-field` internally — every `--md-text-field-*` custom property passes through — and its steppers are `md-icon-button`s |
| `md-otp-field` | `md-button` | Verify action (`auto-submit` covers the no-button flow) |
| Any chart | `md-card` | Charts belong on a dashboard tile |
| `md-line-chart` | `md-segmented-button-set` | Period picker (1W / 1M / 1Y) driving the range |
| `md-sparkline` | `md-list-item`, `md-table-cell` | Trend column beside a value |
| `md-skeleton` | `md-card`, `md-list` | Render N placeholders in the real layout while fetching |
| `md-meter` | `md-chip`, `md-card` | Same semantic status colour on both; quota and usage summaries live on a card |
| `md-color-picker` | `md-text-field`, `md-button` | Label and helper text beside it in a form; save / cancel in the surrounding popover or dialog |
| `md-rating` | `md-text-field`, `md-card` | A rating row in a review form; aggregate scores on a review card |
| `md-accordion` | `md-divider` | Optional inner dividers inside long item content |
| `md-stepper` | `md-button` | Next / back / submit adjacent to the stepper |

### 7.3 Nesting that is always wrong

- A dialog opened from inside a dialog. Use `md-stepper` inside **one**
  `md-dialog`.
- A component inside a native interactive element (`<button>`, `<a>`) — it
  nests interactive controls and destroys the accessibility tree. Use the
  component's own `href` / `type` props.
- `md-tabs` used for top-level app navigation. Tabs switch sibling views of the
  same data; destinations are `md-navigation-bar` / `md-navigation-rail`.

---

## §8 — Page recipes

Complete, runnable screens. Each renders as-is once the components are
registered and the token sheet and font links from §3 are loaded — no
placeholder identifiers, no helper functions to write.

### 8.1 Login screen

`<form>` is load-bearing: it is what makes `required` block submit and what
`type="submit"` calls `requestSubmit()` on.

```html
<main style="display: grid; place-items: center; min-block-size: 100dvh; padding: 24px;">
  <form id="login-form" style="inline-size: min(420px, 100%);">
    <md-card variant="elevated" style="padding: 32px; display: flex; flex-direction: column; gap: 20px;">
      <h1 style="margin: 0; font: var(--md-sys-typescale-headline-medium-font);">Sign in</h1>

      <md-text-field
        variant="outlined"
        label="Email"
        type="email"
        name="email"
        autocomplete="username"
        required
      ></md-text-field>

      <md-text-field
        variant="outlined"
        label="Password"
        type="password"
        name="password"
        autocomplete="current-password"
        password-toggle="internal"
        required
      ></md-text-field>

      <md-button variant="filled" type="submit" full-width>Sign in</md-button>
      <md-button variant="text" href="/forgot-password">Forgot password?</md-button>
    </md-card>
  </form>
</main>

<script type="module">
  document.getElementById('login-form').addEventListener('submit', (e) => {
    e.preventDefault();
    const data = new FormData(e.currentTarget);
    console.log(data.get('email'), data.get('password'));
  });
</script>
```

### 8.2 Settings page (mobile)

Top app bar + grouped rows of instant-apply switches. `md-switch` uses
**`selected`**, not `checked`. The rows are `type="text"` (non-interactive), so
the switch is the only control — one tab stop per setting.

```html
<md-app-bar variant="small" headline="Settings">
  <md-icon-button slot="leading" icon="arrow_back" aria-label="Back"></md-icon-button>
</md-app-bar>

<main style="padding: 16px; display: flex; flex-direction: column; gap: 16px;">
  <md-card variant="outlined">
    <md-list>
      <md-list-item headline="Notifications" supporting-text="Push, email, in-app" lines="2">
        <md-switch slot="trailing" selected aria-label="Enable notifications" data-setting="notifications"></md-switch>
      </md-list-item>
      <md-divider></md-divider>
      <md-list-item headline="Dark mode" supporting-text="Match system" lines="2">
        <md-switch slot="trailing" aria-label="Enable dark mode" data-setting="dark"></md-switch>
      </md-list-item>
      <md-divider></md-divider>
      <md-list-item headline="Sync over cellular">
        <md-switch slot="trailing" selected aria-label="Sync over cellular" data-setting="cellular"></md-switch>
      </md-list-item>
    </md-list>
  </md-card>
</main>

<md-snackbar id="settings-toast" message="Setting saved"></md-snackbar>

<script type="module">
  const toast = document.getElementById('settings-toast');
  document.querySelectorAll('md-switch[data-setting]').forEach((sw) => {
    sw.addEventListener('mdChange', (e) => {
      if (sw.dataset.setting === 'dark') {
        document.documentElement.setAttribute('data-theme', e.detail.selected ? 'dark' : 'light');
      }
      toast.show();
    });
  });
</script>
```

### 8.3 Settings form (deferred save, with validation)

When settings are saved on submit rather than applied instantly, use a real
form. `required` blocks the submit; every control needs a `name` to reach
`FormData`.

```html
<form id="profile-form" style="max-inline-size: 560px; margin: 24px auto; padding: 0 16px;">
  <md-card variant="outlined" style="padding: 24px; display: flex; flex-direction: column; gap: 20px;">
    <h2 style="margin: 0; font: var(--md-sys-typescale-title-large-font);">Profile</h2>

    <md-text-field
      variant="outlined"
      label="Display name"
      name="displayName"
      required
      supporting-text="Shown on your public profile"
    ></md-text-field>

    <md-select variant="outlined" label="Language" name="language" value="en" required>
      <md-select-option value="en" label="English"></md-select-option>
      <md-select-option value="de" label="Deutsch"></md-select-option>
      <md-select-option value="ar" label="العربية"></md-select-option>
    </md-select>

    <!-- md-checkbox has NO label slot. It is a labelable, form-associated
         element: wrap it in a native <label> (which names it AND forwards
         clicks), or give the host an aria-label. Text between the tags is
         NOT rendered. -->
    <label style="display: inline-flex; align-items: center; gap: 12px; cursor: pointer;">
      <md-checkbox name="newsletter" value="yes" supporting-text="Monthly, no more"></md-checkbox>
      <span>Send me product news</span>
    </label>

    <div style="display: flex; gap: 8px; justify-content: flex-end;">
      <md-button variant="text" type="reset">Reset</md-button>
      <md-button variant="filled" type="submit">Save changes</md-button>
    </div>
  </md-card>
</form>

<md-snackbar id="saved-toast" message="Changes saved" action="Undo"></md-snackbar>

<script type="module">
  const form = document.getElementById('profile-form');
  const toast = document.getElementById('saved-toast');

  form.addEventListener('submit', (e) => {
    e.preventDefault();
    const data = Object.fromEntries(new FormData(form));
    console.log(data); // { displayName, language, newsletter? }
    toast.show();
  });

  toast.addEventListener('mdAction', () => form.reset());
</script>
```

### 8.4 Dashboard with a FAB

```html
<md-app-bar variant="medium" headline="Inbox">
  <md-icon-button slot="trailing" icon="search" aria-label="Search"></md-icon-button>
  <md-icon-button slot="trailing" icon="filter_list" aria-label="Filter"></md-icon-button>
</md-app-bar>

<main style="padding: 16px; display: grid; gap: 12px; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));">
  <md-card variant="filled" interactive style="padding: 16px;">
    <strong>Acme contract</strong>
    <p style="margin: 4px 0 0; color: var(--md-sys-color-on-surface-variant);">Renewal due in 5 days</p>
  </md-card>
  <md-card variant="filled" interactive style="padding: 16px;">
    <strong>Q4 report draft</strong>
    <p style="margin: 4px 0 0; color: var(--md-sys-color-on-surface-variant);">Shared by Alex</p>
  </md-card>
</main>

<md-fab
  icon="add"
  aria-label="New item"
  style="position: fixed; inset-block-end: 16px; inset-inline-end: 16px; z-index: var(--md-sys-z-index-navigation);"
></md-fab>
```

`inset-inline-end` (not `right`) is what keeps the FAB in the correct corner
under `dir="rtl"`.

### 8.5 Destructive confirmation dialog

`md-dialog` traps focus and returns it to the trigger on close — do not add your
own focus management. The error colouring goes through the button's own custom
properties, never a hex.

```html
<md-button id="open-delete" variant="outlined">Delete account</md-button>

<md-dialog id="confirm-delete" headline="Delete account?" icon="warning">
  <p style="margin: 0;">
    This will permanently delete your account and all associated data.
    This action cannot be undone.
  </p>
  <md-button id="cancel-delete" slot="actions" variant="text">Cancel</md-button>
  <md-button
    id="do-delete"
    slot="actions"
    variant="filled"
    style="--md-button-container-color: var(--md-sys-color-error);
           --md-button-label-color: var(--md-sys-color-on-error);"
  >Delete</md-button>
</md-dialog>

<script type="module">
  const dialog = document.getElementById('confirm-delete');
  document.getElementById('open-delete').addEventListener('mdClick', () => dialog.show());
  document.getElementById('cancel-delete').addEventListener('mdClick', () => dialog.close());
  document.getElementById('do-delete').addEventListener('mdClick', () => {
    dialog.close();
    // perform the deletion
  });
</script>
```

If you omit `slot="actions"` entirely, `md-dialog` renders its own Cancel / OK
pair (labels via `cancel-label` / `ok-label`) and closes itself.

### 8.6 Tabbed content page

`md-tab-panels` finds the nearest preceding `md-tabs` (or the one named by
`for`), follows its `mdTabChange`, and wires `aria-controls` /
`aria-labelledby` both ways. **No JavaScript is required**, and `md-tab` has no
`value` or `selected` prop — selection lives on `md-tabs` as `active-tab-index`.

```html
<md-tabs id="profile-tabs" aria-label="Profile sections" active-tab-index="0">
  <md-tab label="Posts"></md-tab>
  <md-tab label="Replies"></md-tab>
  <md-tab label="Likes" badge="3"></md-tab>
</md-tabs>

<md-tab-panels for="profile-tabs">
  <md-tab-panel style="padding: 16px;">
    <p style="margin: 0;">Your posts appear here.</p>
  </md-tab-panel>
  <md-tab-panel style="padding: 16px;">
    <p style="margin: 0;">Your replies appear here.</p>
  </md-tab-panel>
  <md-tab-panel style="padding: 16px;">
    <p style="margin: 0;">Posts you liked appear here.</p>
  </md-tab-panel>
</md-tab-panels>
```

To react to the switch (lazy-loading a panel, for example), listen on the tabs:

```js
document.getElementById('profile-tabs')
  .addEventListener('mdTabChange', (e) => console.log(e.detail.index, e.detail.previousIndex));
```

### 8.7 The full recipe library

Twenty-two more complete screens live in the documentation, each with a live
demo, the full markup, framework tabs, and production notes. When the user's
request matches one of these, read that page (append the slug to
`https://awc-ui.dev/recipes/`) instead of composing from scratch:

| Recipe slug | Screen |
|---|---|
| `two-factor-verification` | OTP entry, resend countdown, backup-codes dialog |
| `kpi-overview` | Stat tiles with sparklines + charts under a range switcher |
| `data-grid-console` | Bulk-action data table: filters, selection, undo |
| `server-fleet-status` | Table of hosts with meters, sparklines, status dots |
| `release-health-drilldown` | Table row → side-sheet master-detail with charts |
| `csv-import-wizard` | Stepper: upload, map columns, validate, import |
| `role-permission-assignment` | Transfer-list permissions with confirm dialog |
| `org-chart-explorer` | Searchable org chart with side-sheet profiles |
| `moderation-queue` | Verdict controls, confidence meter, card queue |
| `checkout-wizard` | Three-step commerce checkout with validation |
| `appointment-booking` | Date + time pickers inside a stepper flow |
| `survey-nps` | Paged survey using every input control |
| `notification-preferences` | Accordion × switch matrix, quiet hours |
| `app-shell` | Responsive rail/bar chrome, SSR-ready, zero CLS |
| `inbox-shell` | Three-zone list + reading-pane layout |
| `mobile-filter-sheet` | Bottom-sheet filters with applied-chip row |
| `product-reviews` | Rating input + per-star meter breakdown |
| `order-tracking` | Shipment timeline stepper with progress meter |
| `portfolio-markets` | Finance charts + holdings table + trade ticket |
| `pricing-page` | Plan cards, billing toggle, comparison table |
| `async-feedback-patterns` | Skeleton/progress/snackbar choreography rules |
| `charts-gallery` | Every chart component, live-retheming palette |

---

## §9 — Universal do's and don'ts

Apply to every component. Component-specific rules live in each manual.

### 9.1 API and styling

| ✅ Do | ❌ Don't |
|---|---|
| Use the custom element directly — it *is* the control, with its own `href` / `type` props | Wrap it in a native `<button>` / `<a>` (§7.3) |
| Set arrays and objects as **JS properties** (`el.items = [...]`) | Pass them as HTML attributes — they won't parse |
| Theme via `--md-<component>-*` properties, then `::part()` | Reach into shadow internals or override `.md-*` classes |
| Change appearance through design tokens (§4.1) | Hardcode hex colors, px spacing, shadows, or font stacks |
| Use `--md-sys-z-index-*` for your own overlays | Invent z-indexes that land under a menu |
| Use logical CSS (`margin-inline-start`, `inset-inline-end`) | Use `margin-left`, `right`, `padding-right` |
| Set `data-density` / `data-theme` / `dir` once, globally | Set them per component unless you mean a local exception |
| Listen to the component's `md*` events | Rely on native `click` — it fires even when the component's `disabled` / `loading` guard suppressed the action |
| Check the manual for the state prop name | Assume `checked`; `md-switch` uses `selected` |
| Render the element, then call its `@Method` | Call `.show()` on an element not yet in the DOM |

Toggling components flip their own state on activation and *then* emit. On
`md-button`, `mdClick` is cancelable — `preventDefault()` on it vetoes the
toggle and any navigation. `mdChange` fires after the flip and is not
cancelable. If a controlled parent rejects a change it must revert the child
explicitly.

`md-button` has a **toggle mode**: set `toggle` and the button flips its own
`selected` on each activation and exposes `aria-pressed`. `selected` is the
state, not the switch — set it for the initial pressed state and read it back
from `mdClick`'s `detail.selected`. Setting `toggle` and then styling
"pressed" yourself, or setting `selected` without `toggle` (which emits no
`aria-pressed` at all), both produce a control that lies to assistive tech.

### 9.2 Content and hierarchy

| ✅ Do | ❌ Don't |
|---|---|
| Use sentence case for all labels | Uppercase or title-case UI text |
| Keep one high-emphasis action per screen region | Compete `filled` buttons against each other |
| Use `soft-disabled` + `md-tooltip` for contextually-unavailable actions | Use `disabled` and remove it from tab order with no explanation |
| Localize every text prop and `aria-label` | Leave default English prop values in a translated app |

**`disabled` vs `soft-disabled`.** Both render the disabled appearance, but
`disabled` also removes the control from the tab order, so a keyboard or screen
reader user can never find out *why* it is off. `soft-disabled` keeps the
control focusable and announced while still blocking activation — which is what
lets an `md-tooltip` on it explain the gate. Use it whenever the reason is
informative rather than obvious.

Nesting rules — dialog inside a dialog, a component inside a native
`<button>` / `<a>`, tabs used as app navigation — live in §7.3.

### 9.3 Accessibility contract

The library ships WCAG 2.1 AA keyboard and ARIA wiring by default. These are the
rules you must not break:

1. **Every icon-only control gets an accessible name.** `md-icon-button`,
   `md-fab`, and icon-only `md-tab` are nameless without `aria-label` (or
   `aria-labelledby`). `md-fab` will also accept `label`, and warns in the
   console when it has neither.
2. **Every form field gets a `label` prop.** `placeholder` is not a label — it
   disappears on type.
3. **Don't break the tab order.** Every interactive control must be reachable by
   Tab and operable by Enter/Space. If you add `tabindex="-1"` to anything,
   have a reason.
4. **Don't write your own focus trap.** `md-dialog`, `md-bottom-sheet` and
   `md-side-sheet` trap focus while open and restore it to the trigger on
   close — including across shadow boundaries. Adding your own fights theirs.
5. **Don't wrap components in your own live regions.** `md-snackbar` announces
   itself (`politeness="polite"` by default, `"assertive"` when the message must
   interrupt). For an error that blocks the task, use `md-dialog`.
6. **Don't disable motion yourself.** Components honour
   `prefers-reduced-motion: reduce` internally.
7. **Directional icons do not auto-flip in RTL** — see §4.5.
8. **Re-verify contrast after overriding any colour role** — the library's AA
   testing covers the shipped palette only. The Theme Generator at
   <https://awc-ui.dev/theme-generator> runs the WCAG checks live (§4.2).

---

## §10 — Before you ship

1. **Every icon-only control has an accessible name.**
2. **Keyboard-only pass**: reach and operate every control; focus is always
   visible; no traps in dialogs/menus/sheets; focus returns to the trigger.
3. **Theme pass**: light *and* dark, if both are supported — and the attribute
   is set before first paint.
4. **RTL pass**, if an RTL locale ships — check directional icons specifically,
   and grep your own CSS for physical properties.
5. **Density pass** at the configured rung — no clipped labels, touch targets
   still adequate. Remember `density="0"` is inert; use
   `--md-sys-density-scale: 0` to opt a subtree out.
6. **Forms**: every control has a `name`; `required` blocks submit; `FormData`
   contains every field; reset works.
7. **No hardcoded strings** left in markup if the app is localized — including
   default prop values like `Search`, `Dismiss`, `No results`.
8. **No hardcoded design values** — grep the diff for hex colours, `px` radii,
   `box-shadow`, and `z-index` literals.
9. **Contrast** re-verified against AA if colour roles were overridden.
10. **SSR**: if server-rendered, confirm no hydration mismatch and that content
    is present with JS disabled.
11. **No shadow-internal CSS** — only tokens, custom properties, and `::part()`.
12. **Every `md-*` tag you emitted appears in §6.** If it doesn't, it doesn't
    exist.