Slider

A composable slider component with track, fill, thumb, preview, and value parts

Anatomy

<Slider.Root>
  <Slider.Track>
    <Slider.Fill />
  </Slider.Track>
  <Slider.Thumb />
  <Slider.Preview>
    <Slider.Value type="pointer" />
  </Slider.Preview>
</Slider.Root>

Behavior

The base Slider provides a generic range input. It manages value, pointer tracking, and drag interactions. Domain-specific sliders like TimeSlider and VolumeSlider extend this with media-specific bindings.

The slider supports vertical orientation via the orientation prop (defaults to "horizontal").

Styling

Use CSS custom properties to position fill, thumb, and preview elements:

React renders standard DOM elements. Add a className to style them:

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

.slider-thumb {
  left: var(--media-slider-fill);
}

Style based on interaction state:

.slider[data-interactive] .slider-track {
  height: 6px;
}
.slider[data-pointing] .slider-preview {
  opacity: 1;
}

Accessibility

Renders with role="slider" and automatic ARIA attributes (aria-valuemin, aria-valuemax, aria-valuenow, aria-valuetext). Override the label with the label prop. Keyboard controls:

Arrow Left / Arrow Right: step by step increment
Page Up / Page Down: step by largeStep increment
Home: jump to minimum
End: jump to maximum

Examples

Basic

A slider with track, fill, and thumb.

import { Slider } from '@videojs/react';
import { useState } from 'react';

import './BasicUsage.css';

export default function BasicUsage() {
  const [value, setValue] = useState(50);

  return (
    <div className="react-slider-basic">
      <Slider.Root className="react-slider-basic__slider" value={value} onValueChange={setValue}>
        <Slider.Track className="react-slider-basic__track">
          <Slider.Fill className="react-slider-basic__fill" />
        </Slider.Track>
        <Slider.Thumb className="react-slider-basic__thumb" />
      </Slider.Root>
    </div>
  );
}

.react-slider-basic {
  display: flex;
  align-items: center;
  padding: 24px;
  background: #1a1a1a;
}

.react-slider-basic__slider {
  position: relative;
  width: 100%;
  display: flex;
  align-items: center;
  height: 20px;
  cursor: pointer;
}

.react-slider-basic__track {
  position: absolute;
  left: 0;
  right: 0;
  height: 4px;
  background: rgba(255, 255, 255, 0.3);
  border-radius: 9999px;
  transition: height 150ms ease;
}

.react-slider-basic__slider[data-interactive] .react-slider-basic__track {
  height: 6px;
}

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

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

.react-slider-basic__slider[data-interactive] .react-slider-basic__thumb {
  transform: translateX(-50%) scale(1);
}

.react-slider-basic__slider[data-dragging] .react-slider-basic__thumb {
  transform: translateX(-50%) scale(1.1);
}

With Preview

A slider with a pointer-tracking preview that displays the value at the current pointer position.

import { Slider } from '@videojs/react';
import { useState } from 'react';

import './WithPreview.css';

export default function WithPreview() {
  const [value, setValue] = useState(50);

  return (
    <div className="react-slider-preview">
      <Slider.Root className="react-slider-preview__slider" value={value} onValueChange={setValue}>
        <Slider.Track className="react-slider-preview__track">
          <Slider.Fill className="react-slider-preview__fill" />
        </Slider.Track>
        <Slider.Thumb className="react-slider-preview__thumb" />
        <Slider.Preview className="react-slider-preview__preview">
          <Slider.Value type="pointer" className="react-slider-preview__value" />
        </Slider.Preview>
      </Slider.Root>
    </div>
  );
}

.react-slider-preview {
  display: flex;
  align-items: center;
  padding: 40px 24px;
  background: #1a1a1a;
}

.react-slider-preview__slider {
  position: relative;
  width: 100%;
  display: flex;
  align-items: center;
  height: 20px;
  cursor: pointer;
}

.react-slider-preview__track {
  position: absolute;
  left: 0;
  right: 0;
  height: 4px;
  background: rgba(255, 255, 255, 0.3);
  border-radius: 9999px;
  transition: height 150ms ease;
}

.react-slider-preview__slider[data-interactive] .react-slider-preview__track {
  height: 6px;
}

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

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

.react-slider-preview__slider[data-interactive] .react-slider-preview__thumb {
  transform: translateX(-50%) scale(1);
}

.react-slider-preview__slider[data-dragging] .react-slider-preview__thumb {
  transform: translateX(-50%) scale(1.1);
}

.react-slider-preview__preview {
  position: absolute;
  bottom: 100%;
  margin-bottom: 6px;
  pointer-events: none;
  opacity: 0;
  transition: opacity 150ms ease;
}

.react-slider-preview__slider[data-pointing] .react-slider-preview__preview {
  opacity: 1;
}

.react-slider-preview__value {
  background: rgba(0, 0, 0, 0.8);
  color: white;
  font-size: 12px;
  padding: 2px 6px;
  border-radius: 4px;
  white-space: nowrap;
}

API Reference

Root

Props

Prop	Type	Default
`disabled`	`boolean`	`false`
Description Whether the slider is non-interactive.
`label`	`string \| function`	`''`
Description Custom label for the slider. Type `string \| ((state: SliderState) => string)`
`largeStep`	`number`	`10`
Description Large step increment (Page Up/Down keys).
`max`	`number`	`100`
Description Maximum value of the slider range.
`min`	`number`	`0`
Description Minimum value of the slider range.
`orientation`	`'horizontal' \| 'vertical'`	`'horizontal'`
Description Axis of slider movement.
`step`	`number`	`1`
Description Step increment for value changes (arrow keys).
`thumbAlignment`	`'center' \| 'edge'`	`'center'`
Description How the thumb aligns at the track edges. `edge` constrains the thumb within track bounds.
`value`	`number`	`0`
Description Current slider value.

State

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

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 or pointing 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.

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 or pointing 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.

CSS custom properties

Variable	Details
`--media-slider-fill`
Description Fill level percentage (0–100).
`--media-slider-pointer`
Description Pointer position percentage (0–100).
`--media-slider-buffer`
Description Buffer level percentage (0–100).

Buffer

Displays the buffered range on the slider track.

Fill

Displays the filled portion from start to the current value.

Preview

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

Props

Prop	Type	Default	Details
`overflow`	`SliderPreviewOverflow`	`—`
Description How the preview handles the slider boundaries. `'clamp'` keeps the preview within bounds, `'visible'` allows it to extend beyond the edges.

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 or pointing 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.

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 or pointing 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.

Thumbnail

Track

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

Value

Displays a formatted text representation of the slider value. Renders an <output> element.

Props

Prop	Type	Default
`format`	`((value: number) => string)`	`—`
Description Custom formatter for the displayed value. Overrides the root's `formatValue`.
`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 or pointing 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.