media-cast-button

Accessible Cast toggle button with state reflection and keyboard support

Anatomy

<media-cast-button></media-cast-button>

Behavior

Toggles a Google Cast session. Clicking the button while disconnected opens the Cast device picker; clicking while connected ends the session.

The button derives its presentation from availability:

"unsupported" — the HTML custom element receives the native hidden attribute; the React component returns null.
"unavailable" — the button remains visible and focusable with aria-disabled="true" and data-disabled, but does not open the picker. This lets a tooltip explain that no Cast device is reachable.
"available" — the button is fully interactive unless the disabled prop is set.

Cast sessions come from the Google Cast component. Add it to the player next to your media element; without it the button drives the browser’s native Remote Playback API instead, which offers no receiver or load-request configuration.

Styling

Style based on cast and disabled state:

/* During an active session */
media-cast-button[data-cast-state="connected"] {
  color: blue;
}

/* Cast is supported, but no device is reachable */
media-cast-button[data-disabled] {
  cursor: not-allowed;
  opacity: 0.5;
}

React renders a <button> element. Add a className to style it:

/* During an active session */
.cast-button[data-cast-state="connected"] {
  color: blue;
}

/* Cast is supported, but no device is reachable */
.cast-button[data-disabled] {
  cursor: not-allowed;
  opacity: 0.5;
}

Unsupported buttons are hidden automatically. No availability selector or extra hiding CSS is required.

Accessibility

Renders a <button> with an automatic aria-label:

Cast state	Default label
`'disconnected'`	“Start casting”
`'connecting'`	“Connecting”
`'connected'`	“Stop casting”

Override with the label prop. Keyboard activation: Enter / Space.

Examples

Basic Usage

import { CastButton, createPlayer } from '@videojs/react';
import { HlsJsVideo } from '@videojs/react/media/hlsjs-video';
import { videoFeatures } from '@videojs/react/video';

const Player = createPlayer({ features: videoFeatures });

export default function BasicUsage() {
  return (
    <Player.Provider>
      <Player.Container className="media-container">
        <HlsJsVideo src="https://stream.mux.com/BV3YZtogl89mg9VcNBhhnHm02Y34zI1nlMuMQfAbl3dM.m3u8" autoPlay muted playsInline loop />
        <CastButton
          className="media-cast-button"
          render={(props, state) => (
            <button {...props}>{state.connection === 'connected' ? 'Stop casting' : 'Start casting'}</button>
          )}
        />
      </Player.Container>
    </Player.Provider>
  );
}

.media-container {
  position: relative;
}

.media-container video {
  width: 100%;
}

.media-cast-button {
  position: absolute;
  right: 10px;
  bottom: 10px;
  padding-block: 8px;
  padding-inline: 20px;
  color: black;
  cursor: pointer;
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: 9999px;
  backdrop-filter: blur(10px);
}

.media-cast-button[data-disabled] {
  cursor: not-allowed;
  opacity: 0.5;
  filter: grayscale(1);
}

Stop casting Start casting

<video-player class="video-player">
    <media-container>
        <hlsjs-video
            src="https://stream.mux.com/BV3YZtogl89mg9VcNBhhnHm02Y34zI1nlMuMQfAbl3dM.m3u8"
            autoplay
            muted
            playsinline
            loop
        ></hlsjs-video>
        <media-cast-button class="media-cast-button">
            <span class="connected">Stop casting</span>
            <span class="disconnected">Start casting</span>
        </media-cast-button>
    </media-container>
</video-player>

.video-player {
  position: relative;
  display: block;
}

.video-player video {
  width: 100%;
}

.media-cast-button {
  position: absolute;
  right: 10px;
  bottom: 10px;
  padding-block: 8px;
  padding-inline: 20px;
  color: black;
  cursor: pointer;
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: 9999px;
  backdrop-filter: blur(10px);
}

.media-cast-button[data-disabled] {
  cursor: not-allowed;
  opacity: 0.5;
  filter: grayscale(1);
}

.media-cast-button .connected {
  display: none;
}
.media-cast-button .disconnected {
  display: none;
}
.media-cast-button[data-cast-state="connected"] .connected {
  display: inline;
}
.media-cast-button:not([data-cast-state="connected"]) .disconnected {
  display: inline;
}

import '@videojs/html/video/player';
import '@videojs/html/media/hlsjs-video';
import '@videojs/html/ui/cast-button';

API Reference

Props

Prop	Type	Default
`disabled`	`boolean`	`false`
Attribute `disabled` Description Whether the button is disabled.
`label`	`Text \| string \| Text) \| function`	`''`
Attribute `label` Description Custom label for the button. Type `Text \| string \| ((state: CastButtonState) => string \| Text)`

State

State is accessible via the render, className, and style props.

State is reflected as data attributes for CSS styling.

Property	Type	Details
`connection`	`'disconnected' \| 'connecting' \| 'conn...`
Description Current cast connection state (`disconnected`, `connecting`, or `connected`). Type `'disconnected' \| 'connecting' \| 'connected'`
`availability`	`'available' \| 'unavailable' \| 'unsupp...`
Description Whether casting is `available` (a device is reachable), `unavailable` (no device), or `unsupported`. Type `'available' \| 'unavailable' \| 'unsupported'`
`disabled`	`boolean`
Description Non-interactive but still focusable (mirrors `aria-disabled`).
`hidden`	`boolean`
Description Whether the button is hidden because the feature is unsupported.
`label`	`Text \| string`

Data attributes

Attribute	Type	Details
`data-cast-state`	`'disconnected' \| 'connecting' \| 'conn...`
Description Current remote playback connection state. @see https://developer.mozilla.org/en-US/docs/Web/API/RemotePlayback/state Type `'disconnected' \| 'connecting' \| 'connected'`
`data-availability`	`'available' \| 'unavailable' \| 'unsupp...`
Description Whether remote playback can be requested on this platform. @see https://developer.mozilla.org/en-US/docs/Web/API/RemotePlayback Type `'available' \| 'unavailable' \| 'unsupported'`
`data-disabled`
Description Present when the button is non-interactive (mirrors `aria-disabled`).
`data-hidden`
Description Present when the button is hidden because the feature is unsupported.