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Octocat

Slider

A slider component based on the native range input

 
import { Slider } from '@/components/slider';

export default function SliderPreview() {
  return (
    <Slider min={0} max={100} defaultValue={50}>
      <Slider.Track>
        <Slider.Range />
      </Slider.Track>
      <Slider.Thumb />
    </Slider>
  );
}

Dependencies

Slot
composeRefs

Source Code

import {
  createContext,
  use,
  useCallback,
  useMemo,
  useRef,
  useState,
} from 'react';

import { Slot } from '@/components/slot';
import { composeRefs } from '@/lib/compose-refs';
import { cn, cva } from '@/lib/utils/classnames';

interface SliderContextValue {
  value: number;
  setValue: (value: number) => void;
  min: number;
  max: number;
  step: number;
  orientation: 'horizontal' | 'vertical';
  disabled: boolean;
  onValueChange?: (value: number) => void;
  progressFactor: number;
}

const SliderContext = createContext<SliderContextValue | null>(null);

const useSliderContext = () => {
  const context = use(SliderContext);
  if (!context) {
    throw new Error('Slider components must be used within a Slider');
  }
  return context;
};

const sliderStyle = cva({
  base: [
    '[--track-thickness:--spacing(2)]',
    '[--thumb-size:--spacing(4)]',
    'relative inline-flex outline-none focus:outline-none',
  ],
  variants: {
    orientation: {
      horizontal: 'h-(--track-thickness) w-56 items-center',
      vertical: 'h-56 w-(--track-thickness) justify-center',
    },
    disabled: {
      true: 'pointer-events-none opacity-60',
      false: '',
    },
  },
  defaultVariants: {
    orientation: 'horizontal',
    disabled: false,
  },
});

interface SliderProps
  extends Omit<
    React.ComponentPropsWithRef<'div'>,
    'onChange' | 'defaultValue'
  > {
  min?: number;
  max?: number;
  step?: number;
  value?: number;
  defaultValue?: number;
  onValueChange?: (value: number) => void;
  orientation?: 'horizontal' | 'vertical';
  disabled?: boolean;
  asChild?: boolean;
}

const Slider = ({
  min = 0,
  max = 100,
  step = 1,
  value: valueProp,
  defaultValue = min,
  onValueChange,
  orientation = 'horizontal',
  disabled = false,
  className,
  asChild,
  children,
  ref,
  ...props
}: SliderProps) => {
  const [internalValue, setInternalValue] = useState(defaultValue);
  const value = valueProp ?? internalValue;

  const setValue = useCallback(
    (newValue: number) => {
      if (valueProp === undefined) {
        setInternalValue(newValue);
      }
      onValueChange?.(newValue);
    },
    [valueProp, onValueChange]
  );

  const progressFactor = useMemo(
    () => (max === min ? 0 : (value - min) / (max - min)),
    [value, min, max]
  );

  const contextValue = useMemo(
    () => ({
      value,
      setValue,
      min,
      max,
      step,
      orientation,
      disabled,
      onValueChange,
      progressFactor,
    }),
    [
      value,
      setValue,
      min,
      max,
      step,
      orientation,
      disabled,
      onValueChange,
      progressFactor,
    ]
  );

  const Comp = asChild ? Slot : 'div';

  return (
    <SliderContext value={contextValue}>
      <Comp
        ref={ref}
        className={cn(sliderStyle({ orientation, disabled }), className)}
        style={{
          '--progress-track-factor': `${progressFactor}`,
        }}
        tabIndex={-1}
        {...props}
      >
        {children}
      </Comp>
    </SliderContext>
  );
};

const sliderTrackStyle = cva({
  base: [
    'pointer-events-none absolute rounded-full bg-foreground-secondary/40',
  ],
  variants: {
    orientation: {
      // Inset the track ends by a quarter of the thumb size so the thumb visually
      // extends slightly past the track at min/max, hiding the sliver of track
      // that would otherwise peek out around the thumb's circular edge.
      horizontal:
        'right-[calc(var(--thumb-size)/4)] left-[calc(var(--thumb-size)/4)] h-(--track-thickness)',
      vertical:
        'top-[calc(var(--thumb-size)/4)] bottom-[calc(var(--thumb-size)/4)] w-(--track-thickness)',
    },
  },
  defaultVariants: {
    orientation: 'horizontal',
  },
});

interface SliderTrackProps extends React.ComponentPropsWithRef<'div'> {
  asChild?: boolean;
}

const SliderTrack = ({
  className,
  asChild,
  ref,
  ...props
}: SliderTrackProps) => {
  const { orientation } = useSliderContext();
  const Comp = asChild ? Slot : 'div';

  return (
    <Comp
      ref={ref}
      className={cn(sliderTrackStyle({ orientation }), className)}
      tabIndex={-1}
      {...props}
    />
  );
};

const sliderRangeStyle = cva({
  base: ['pointer-events-none absolute z-5 rounded-full bg-accent/90'],
  variants: {
    orientation: {
      horizontal: 'left-0 h-(--track-thickness)',
      vertical: 'bottom-0 w-(--track-thickness)',
    },
  },
  defaultVariants: {
    orientation: 'horizontal',
  },
});

interface SliderRangeProps extends React.ComponentPropsWithRef<'div'> {
  asChild?: boolean;
}

const SliderRange = ({
  className,
  asChild,
  ref,
  style,
  ...props
}: SliderRangeProps) => {
  const { orientation } = useSliderContext();
  const Comp = asChild ? Slot : 'div';

  const rangeStyle = {
    [orientation === 'horizontal' ? 'width' : 'height']:
      `calc(var(--progress-track-factor) * 100%)`,
    ...style,
  };

  return (
    <Comp
      ref={ref}
      className={cn(sliderRangeStyle({ orientation }), className)}
      style={rangeStyle}
      tabIndex={-1}
      {...props}
    />
  );
};

const sliderThumbStyle = cva({
  base: [
    'absolute z-10 cursor-pointer appearance-none rounded-full outline-none',

    // Reset default styles
    '[&::-webkit-slider-thumb]:appearance-none',

    // Thumb styles
    '[&::-webkit-slider-thumb]:transition',
    '[&::-webkit-slider-thumb]:h-(--thumb-size) [&::-webkit-slider-thumb]:w-(--thumb-size)',
    '[&::-webkit-slider-thumb]:border [&::-webkit-slider-thumb]:border-border [&::-webkit-slider-thumb]:bg-background [&::-webkit-slider-thumb]:shadow-xs',
    '[&::-webkit-slider-thumb]:z-10 [&::-webkit-slider-thumb]:rounded-full',
    '[&::-moz-range-thumb]:transition',
    '[&::-moz-range-thumb]:h-(--thumb-size) [&::-moz-range-thumb]:w-(--thumb-size)',
    '[&::-moz-range-thumb]:border [&::-moz-range-thumb]:border-border [&::-moz-range-thumb]:bg-background [&::-moz-range-thumb]:shadow-xs',
    '[&::-moz-range-thumb]:rounded-full',

    // Hover states
    '[&::-webkit-slider-thumb:hover]:scale-130',
    '[&::-moz-range-thumb:hover]:scale-130',

    // Active states
    '[&:active::-webkit-slider-thumb]:scale-130',
    '[&:active::-moz-range-thumb]:scale-130',

    // Focus states - apply to pseudo-elements only
    '[&:focus-visible::-webkit-slider-thumb]:ring-(length:--ring-width)',
    '[&:focus-visible::-webkit-slider-thumb]:ring-ring',
    '[&:focus-visible::-moz-range-thumb]:ring-(length:--ring-width)',
    '[&:focus-visible::-moz-range-thumb]:ring-ring',
  ],
  variants: {
    orientation: {
      horizontal: [
        'h-(--track-thickness) w-full',
        '[&::-webkit-slider-thumb]:-mt-[calc(var(--thumb-size)-var(--track-thickness))/2]',
        '[&::-moz-range-thumb]:-mt-[calc(var(--thumb-size)-var(--track-thickness))/2]',
        '[&::-webkit-slider-runnable-track]:h-(--track-thickness)',
        '[&::-moz-range-track]:h-(--track-thickness)',
      ],
      vertical: [
        'h-full w-(--track-thickness) [direction:rtl] [writing-mode:vertical-lr]',
        '[&::-webkit-slider-thumb]:-ml-[calc(var(--thumb-size)-var(--track-thickness))/2]',
        '[&::-moz-range-thumb]:-ml-[calc(var(--thumb-size)-var(--track-thickness))/2]',
        '[&::-webkit-slider-runnable-track]:w-(--track-thickness)',
        '[&::-moz-range-track]:w-(--track-thickness)',
      ],
    },
  },
  defaultVariants: {
    orientation: 'horizontal',
  },
});

type SliderThumbProps = Omit<
  React.ComponentPropsWithRef<'input'>,
  'value' | 'type'
>;

const SliderThumb = ({
  className,
  onChange,
  ref,
  ...props
}: SliderThumbProps) => {
  const { value, setValue, min, max, step, orientation, disabled } =
    useSliderContext();

  const internalRef = useRef<HTMLInputElement>(null);

  const handleChange = useCallback(
    (e: React.ChangeEvent<HTMLInputElement>) => {
      const newValue = Number(e.target.value);
      setValue(newValue);

      // Update CSS variable for range visualization
      const sliderElement = e.target.closest(
        '[style*="--progress-track-factor"]'
      ) as HTMLElement;
      if (sliderElement) {
        sliderElement.style.setProperty(
          '--progress-track-factor',
          `${max === min ? 0 : (newValue - min) / (max - min)}`
        );
      }

      onChange?.(e);
    },
    [setValue, min, max, onChange]
  );

  return (
    <input
      ref={composeRefs(ref, internalRef)}
      type="range"
      min={min}
      max={max}
      step={step}
      value={value}
      disabled={disabled}
      onChange={handleChange}
      className={cn(sliderThumbStyle({ orientation }), className)}
      {...props}
    />
  );
};

const CompoundSlider = Object.assign(Slider, {
  Track: SliderTrack,
  Range: SliderRange,
  Thumb: SliderThumb,
});

export { CompoundSlider as Slider };

API Reference

A composable slider component built on the native range input.

Slider

The root container component.

Prop Default Type Description
min 0 number Minimum value of the slider.
max 100 number Maximum value of the slider.
step 1 number Step increment value.
value - number Controlled value of the slider.
defaultValue - number Default value for uncontrolled usage.
onValueChange - (value: number) => void Callback function when value changes.
orientation "horizontal" "horizontal" | "vertical" Orientation of the slider.
disabled false boolean Whether the slider is disabled.
asChild false boolean Render as child element using Slot.

Slider.Track

The track background element.

Prop Default Type Description
asChild false boolean Render as child element using Slot.

Slider.Range

The filled range portion of the track.

Prop Default Type Description
asChild false boolean Render as child element using Slot.

Slider.Thumb

The draggable thumb element (renders as input[type="range"]). Extends all standard input props except value and type.

The component uses CSS variables for customization:

  • --track-thickness - Thickness of the slider track
  • --thumb-size - Size of the slider thumb

Examples

Simple

Basic usage with composable structure. The slider requires Slider.Track, Slider.Range, and Slider.Thumb children.


          <Slider min={0} max={100} defaultValue={50}>
  <Slider.Track>
    <Slider.Range />
  </Slider.Track>
  <Slider.Thumb />
</Slider>
        
import { Slider } from '@/components/slider';

export default function SliderPreview() {
  return (
    <Slider min={0} max={100} defaultValue={50}>
      <Slider.Track>
        <Slider.Range />
      </Slider.Track>
      <Slider.Thumb />
    </Slider>
  );
}

Steps

Slider with defined step intervals.

 
import { Slider } from '@/components/slider';

export default function SliderPreview() {
  return (
    <Slider min={0} max={100} defaultValue={50} step={10}>
      <Slider.Track>
        <Slider.Range />
      </Slider.Track>
      <Slider.Thumb />
    </Slider>
  );
}

Vertical

Vertical orientation of the slider.

 
import { Slider } from '@/components/slider';

export default function SliderPreview() {
  return (
    <Slider min={0} max={100} defaultValue={50} orientation="vertical">
      <Slider.Track>
        <Slider.Range />
      </Slider.Track>
      <Slider.Thumb />
    </Slider>
  );
}

Disabled

Disabled state of the slider.

 
import { Slider } from '@/components/slider';

export default function SliderPreview() {
  return (
    <Slider min={0} max={100} defaultValue={50} disabled>
      <Slider.Track>
        <Slider.Range />
      </Slider.Track>
      <Slider.Thumb />
    </Slider>
  );
}

Best Practices

  1. Usage Guidelines:

    • Always provide clear min and max values
    • Consider step intervals for precise control
    • Use appropriate slider length for the value range
    • Set a meaningful default value

  2. Accessibility:

    • Provide clear visual feedback
    • Include aria-labels for screen readers
    • Ensure keyboard navigation works (arrow keys)

  3. Interaction:

    • Provide immediate visual feedback
    • Consider adding value tooltips for precision
    • Handle both mouse and touch interactions

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