ReferenceSliders

media-volume-slider

A slider component for controlling media playback volume

Import

import '@videojs/html/ui/volume-slider';
import '@videojs/html/ui/slider-track';
import '@videojs/html/ui/slider-fill';
import '@videojs/html/ui/slider-thumb';
import '@videojs/html/ui/slider-preview';
import '@videojs/html/ui/slider-value';

Anatomy

<media-volume-slider>
  <media-slider-track>
    <media-slider-fill></media-slider-fill>
  </media-slider-track>
  <media-slider-thumb></media-slider-thumb>
  <media-slider-preview>
    <media-slider-value type="pointer"></media-slider-value>
  </media-slider-preview>
</media-volume-slider>

Behavior

Controls the media volume level. The slider maps its 0–100 internal range to the media’s 0–1 volume scale. When the media is muted, the fill level drops to 0 regardless of the stored volume value.

When volumeAvailability is not "available", the element receives native hidden, data-hidden, and disabled ARIA semantics. This is independent of mutedAvailability, which controls whether the mute button is shown.

Styling

Use CSS custom properties to style the fill and pointer levels:

media-volume-slider::before {
  width: var(--media-slider-fill);
}

Accessibility

Renders with role="slider" and an automatic aria-label that resolves to “Volume” from the active locale. Override with the label prop. Keyboard controls:

Arrow Left / Arrow Right: step by step increment
Page Up / Page Down: step by largeStep increment
Home: set volume to 0
End: set volume to max

Scroll wheel support:

Mouse wheel / trackpad scroll: adjusts volume by wheelStep increment (default 5)

Examples

Nest sub-components for full control over the slider’s DOM structure. This example includes a track, fill bar, draggable thumb, and a tooltip that shows the volume percentage on hover.

Unmute Mute

<video-player class="video-player">
  <media-container>
    <video src="https://stream.mux.com/BV3YZtogl89mg9VcNBhhnHm02Y34zI1nlMuMQfAbl3dM/highest.mp4" autoplay muted playsinline loop></video>
    <media-mute-button class="media-mute-button">
      <span class="muted">Unmute</span>
      <span class="unmuted">Mute</span>
    </media-mute-button>
    <media-volume-slider class="media-volume-slider">
      <media-slider-track class="media-slider-track">
        <media-slider-fill class="media-slider-fill"></media-slider-fill>
      </media-slider-track>
      <media-slider-thumb class="media-slider-thumb"></media-slider-thumb>
      <media-slider-value type="pointer" class="media-slider-value"></media-slider-value>
    </media-volume-slider>
  </media-container>
</video-player>

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

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

.media-mute-button {
  position: absolute;
  bottom: 10px;
  left: 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-mute-button .muted {
  display: none;
}
.media-mute-button .unmuted {
  display: none;
}
.media-mute-button[data-muted] .muted {
  display: inline;
}
.media-mute-button:not([data-muted]) .unmuted {
  display: inline;
}

.media-volume-slider {
  position: absolute;
  right: 10px;
  bottom: 10px;
  display: flex;
  align-items: center;
  width: 100px;
  height: 20px;
  cursor: pointer;
}

.media-slider-track {
  position: absolute;
  right: 0;
  left: 0;
  height: 4px;
  background: rgba(255, 255, 255, 0.3);
  border-radius: 9999px;
  backdrop-filter: blur(10px);
  transition: height 150ms ease;
}

.media-volume-slider[data-interactive] .media-slider-track {
  height: 6px;
}

.media-slider-fill {
  position: absolute;
  top: 0;
  left: 0;
  width: var(--media-slider-fill);
  height: 100%;
  background: white;
  border-radius: 9999px;
}

.media-slider-thumb {
  position: absolute;
  left: var(--media-slider-fill);
  width: 14px;
  height: 14px;
  background: white;
  border-radius: 50%;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.4);
  transform: translateX(-50%) scale(0);
  transition: transform 150ms ease;
}

.media-volume-slider[data-interactive] .media-slider-thumb {
  transform: translateX(-50%) scale(1);
}

.media-volume-slider[data-dragging] .media-slider-thumb {
  transform: translateX(-50%) scale(1.1);
}

.media-slider-value {
  position: absolute;
  bottom: 100%;
  left: var(--media-slider-pointer);
  padding: 2px 6px;
  margin-bottom: 6px;
  font-size: 12px;
  color: white;
  white-space: nowrap;
  pointer-events: none;
  background: rgba(0, 0, 0, 0.8);
  border-radius: 4px;
  opacity: 0;
  transform: translateX(-50%);
  transition: opacity 150ms ease;
}

.media-volume-slider[data-pointing] .media-slider-value {
  opacity: 1;
}

import '@videojs/html/video/player';
import '@videojs/html/ui/container';
import '@videojs/html/ui/mute-button';
import '@videojs/html/ui/volume-slider';
import '@videojs/html/ui/slider-track';
import '@videojs/html/ui/slider-fill';
import '@videojs/html/ui/slider-thumb';
import '@videojs/html/ui/slider-value';

API Reference

media-volume-slider

Props

Prop	Type	Default
`disabled`	`boolean`	—
Description Whether the slider is non-interactive.
`label`	`object`	`''`
Description Custom label for the slider. Type `{ key: string; text: string } \| string \| ((state: SliderState) => Text \| string)`
`largeStep` attribute `large-step`	`number`	—
Description Large step increment (Page Up/Down keys).
`orientation`	`'horizontal' \| 'vertical'`	—
Description Axis of slider movement.
`step`	`number`	`DEFAULT_VOLUME_STEP`
Description Step increment for value changes (arrow keys).
`thumbAlignment` attribute `thumb-alignment`	`'center' \| 'edge'`	—
Description How the thumb aligns at the track edges. `edge` constrains the thumb within track bounds.
`wheelStep` attribute `wheel-step`	`number`	`DEFAULT_VOLUME_STEP`
Description Step increment for wheel scrolling.

State

State is reflected as data attributes for CSS styling.

Property	Type	Details
`value`	`number`
Description Current slider value in the min–max range.
`fillPercent`	`number`
Description Fill level as a percentage (0–100), derived from value.
`pointerPercent`	`number`
Description Pointer position as a percentage of the track (0–100).
`dragging`	`boolean`
Description Whether the user is actively dragging.
`pointing`	`boolean`
Description Whether the pointer is over the slider.
`interactive`	`boolean`
Description Whether dragging, pointing, or focus is active.
`orientation`	`'horizontal' \| 'vertical'`
Description Axis of slider movement.
`disabled`	`boolean`
Description Whether the slider is non-interactive.
`thumbAlignment`	`'center' \| 'edge'`
Description How the thumb aligns at the track edges.
`volume`	`number`
Description Volume level from 0 (silent) to 1 (max).
`muted`	`boolean`
Description Whether audio is muted.
`availability`	`'available' \| 'unavailable' \| 'unsupp...`
Type `'available' \| 'unavailable' \| 'unsupported'`
`hidden`	`boolean`

Data attributes

Attribute	Type	Details
`data-availability`	`'available' \| 'unavailable' \| 'unsupp...`
Type `'available' \| 'unavailable' \| 'unsupported'`
`data-hidden`	—

CSS custom properties

Variable	Description
`--media-slider-fill`	Fill level percentage (0–100), representing the current volume level.
`--media-slider-pointer`	Pointer position percentage (0–100), tracking the cursor along the slider.

Events

Event	Description
`drag-end`	Fired when a pointer drag ends.
`drag-start`	Fired when a pointer drag starts.

media-slider-fill

Displays the filled portion from start to the current value.

media-slider-preview

Positioning container for preview content that tracks the pointer along the slider.

Props

Prop	Type	Default	Details
`overflow`	`'clamp' \| 'visible'`	—
Description How the preview handles slider boundaries. `clamp` keeps it within bounds; `visible` lets it extend past them.

Data attributes

Attribute	Type	Details
`data-dragging`	—
Description Present when the user is actively dragging.
`data-pointing`	—
Description Present when the pointer is over the slider.
`data-interactive`	—
Description Present when dragging, pointing, or focus is active.
`data-orientation`	`'horizontal' \| 'vertical'`
Description Current axis of slider movement (`horizontal` or `vertical`).
`data-disabled`	—
Description Present when the slider is non-interactive.

media-slider-thumb

Draggable handle for setting the slider value. Receives focus and handles keyboard interaction.

Data attributes

Attribute	Type	Details
`data-dragging`	—
Description Present when the user is actively dragging.
`data-pointing`	—
Description Present when the pointer is over the slider.
`data-interactive`	—
Description Present when dragging, pointing, or focus is active.
`data-orientation`	`'horizontal' \| 'vertical'`
Description Current axis of slider movement (`horizontal` or `vertical`).
`data-disabled`	—
Description Present when the slider is non-interactive.

media-slider-track

Contains the slider's visual track and interactive hit zone.

media-slider-value

Writes the formatted current or pointer slider value into its own text content, replacing any children.

Props

Prop	Type	Default	Details
`type`	`'current' \| 'pointer'`	—
Description Which slider value to display: the current position or the pointer position.

Data attributes

Attribute	Type	Details
`data-dragging`	—
Description Present when the user is actively dragging.
`data-pointing`	—
Description Present when the pointer is over the slider.
`data-interactive`	—
Description Present when dragging, pointing, or focus is active.
`data-orientation`	`'horizontal' \| 'vertical'`
Description Current axis of slider movement (`horizontal` or `vertical`).
`data-disabled`	—
Description Present when the slider is non-interactive.