Slider

npm install react-aria-components

"use client";

import { Label, Slider as AriaSlider, SliderOutput, SliderThumb, SliderTrack, type SliderProps as AriaSliderProps } from "react-aria-components";

const styles = {
  root: "block font-(family-name:--tui-font) text-(length:--tui-slider-font-size) leading-none font-(--tui-slider-font-weight) data-disabled:opacity-(--tui-slider-disabled-opacity)",
  // The bar is the whole control: it fills as it is dragged, and its name and its value are written on it.
  track: "relative h-(--tui-slider-height) w-full cursor-default overflow-hidden rounded-(--tui-slider-radius) bg-(--tui-slider-track) text-(--tui-slider-fg) has-[[data-focus-visible]]:[box-shadow:0_0_0_var(--tui-slider-ring-width)_var(--tui-slider-ring)]",
  row: "pointer-events-none absolute inset-y-0 left-0 flex items-center justify-between gap-3 px-(--tui-slider-padding-x)",
  fill: "absolute inset-y-0 left-0 overflow-hidden bg-(--tui-slider-fill) text-(--tui-slider-fill-fg)",
  thumb: "top-1/2 h-full w-6 cursor-grab outline-none data-dragging:cursor-grabbing",
};

export interface SliderProps extends Omit<AriaSliderProps<number>, "className" | "children"> {
  label?: string;
  /** Hides the number at the end of the bar. */
  hideValue?: boolean;
  className?: string;
}

export function Slider({ label, hideValue, className, ...props }: SliderProps) {
  return (
    <AriaSlider {...props} aria-label={label ? undefined : props["aria-label"]} className={[styles.root, className].filter(Boolean).join(" ")}>
      <SliderTrack data-slot="slider-track" className={styles.track}>
        {({ state }) => {
          const part = state.getThumbPercent(0);
          // The words are drawn twice: once on the bar, once on the fill in its colour.
          // The fill clips its copy, so the text changes colour exactly where the fill ends.
          const words = (
            <>
              {label ? <Label>{label}</Label> : <span />}
              {!hideValue && <SliderOutput className="tabular-nums" />}
            </>
          );
          return (
            <>
              <div className={`${styles.row} w-full`}>{words}</div>
              <div aria-hidden className={styles.fill} style={{ width: `${part * 100}%` }}>
                <div className={styles.row} style={{ width: part > 0 ? `${100 / part}%` : 0 }}>
                  {label ? <span>{label}</span> : <span />}
                  {!hideValue && <span className="tabular-nums">{state.getThumbValueLabel(0)}</span>}
                </div>
              </div>
              <SliderThumb data-slot="slider-thumb" className={styles.thumb} />
            </>
          );
        }}
      </SliderTrack>
    </AriaSlider>
  );
}

:root {
  color-scheme: light;
  --tui-bg: #ffffff;
  --tui-fg: #0a0a0a;
  --tui-muted: #f5f5f5;
  --tui-muted-fg: #737373;
  --tui-border: #e5e5e5;
  --tui-primary: #171717;
  --tui-primary-fg: #fafafa;
  --tui-ring: #a3a3a3;
  --tui-success: #16a34a;
  --tui-warning: #d97706;
  --tui-danger: #dc2626;
  --tui-radius: 8px;
  --tui-border-width: 1px;
  --tui-space: 4px;
  --tui-shadow: none;
  --tui-font: ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  --tui-text: 14px;
  --tui-duration: 150ms;

  /* Slider */
  --tui-slider-height: calc(var(--tui-space) * 11);
  --tui-slider-padding-x: calc(var(--tui-space) * 4);
  --tui-slider-radius: calc(var(--tui-radius) * 1.75);
  --tui-slider-font-size: var(--tui-text);
  --tui-slider-font-weight: 500;
  --tui-slider-track: color-mix(in srgb, var(--tui-bg) 94%, var(--tui-fg));
  --tui-slider-fg: var(--tui-fg);
  --tui-slider-fill: var(--tui-primary);
  --tui-slider-fill-fg: var(--tui-primary-fg);
  --tui-slider-ring: var(--tui-ring);
  --tui-slider-ring-width: 2px;
  --tui-slider-disabled-opacity: 0.5;
}

.dark,
[data-theme="dark"] {
  color-scheme: dark;
  --tui-bg: #0a0a0a;
  --tui-fg: #fafafa;
  --tui-muted: #1c1c1c;
  --tui-muted-fg: #a3a3a3;
  --tui-border: #2a2a2a;
  --tui-primary: #fafafa;
  --tui-primary-fg: #171717;
  --tui-ring: #737373;
  --tui-success: #22c55e;
  --tui-warning: #f59e0b;
  --tui-danger: #ef4444;
}