# Elastic volume slider

> A volume slider with rubber: drag past the end and the bar stretches with resistance, then snaps back when you let go.

- Category: [Microinteractions](https://library.aimran.es/components/microinteractions)
- Built with: React + Motion
- Live editor: https://library.aimran.es/blocks/mood-face-slider
- Library: AIMRAN Library (https://library.aimran.es), free, no sign-up, by Aimran Oukham

## Where to use it

This elastic slider borrows the feel of the volume control on recent phones. It fits a music or podcast player, the settings of a video app, or a brightness control in a smart home dashboard. The bar thickens on hover, the speaker icons pulse at zero and at full, and pulling beyond the edge gives that satisfying rubber band.

Start with elasticity around 20 to 30 pixels; set it to zero and you get a clean, normal slider. The stretch only happens when dragging. From the keyboard, arrows move it in steps of five, and ten with Shift held.

## Code

### React (Motion)

```tsx
import { useRef, useState } from "react";
import type { KeyboardEvent, PointerEvent } from "react";
import { animate, motion, useMotionValue, useReducedMotion, useTransform } from "framer-motion";
import { Volume, Volume2, VolumeX } from "lucide-react";

interface ElasticSliderProps {
  label?: string;
  color?: string;
  stretch?: number;
}

export default function ElasticSlider({
  label = "Volume",
  color = "#5e5ce6",
  stretch = 28,
}: ElasticSliderProps) {
  const [value, setValue] = useState(60);
  const [active, setActive] = useState(false);
  const [hover, setHover] = useState(false);
  const track = useRef<HTMLDivElement>(null);
  const dragging = useRef(false);
  const last = useRef(60);
  const overflow = useMotionValue(0);
  const lowPulse = useMotionValue(1);
  const highPulse = useMotionValue(1);
  const reduce = useReducedMotion();

  const scaleX = useTransform(overflow, (o) => 1 + Math.abs(o) / (track.current?.offsetWidth || 200));
  const scaleY = useTransform(overflow, (o) => 1 - Math.min(Math.abs(o) / 90, 0.3));
  const originX = useTransform(overflow, (o) => (o < 0 ? 1 : 0));
  const lowX = useTransform(overflow, (o) => (o < 0 ? o : 0));
  const highX = useTransform(overflow, (o) => (o > 0 ? o : 0));

  const commit = (next: number) => {
    const v = Math.min(100, Math.max(0, Math.round(next)));
    if (!reduce && v !== last.current) {
      if (v === 0) animate(lowPulse, [1, 1.3, 1], { duration: 0.35 });
      if (v === 100) animate(highPulse, [1, 1.3, 1], { duration: 0.35 });
    }
    last.current = v;
    setValue(v);
  };

  const follow = (clientX: number) => {
    const el = track.current;
    if (!el) return;
    const r = el.getBoundingClientRect();
    commit(((clientX - r.left) / r.width) * 100);
    const raw = clientX < r.left ? clientX - r.left : clientX > r.right ? clientX - r.right : 0;
    const max = Math.max(0, stretch);
    overflow.set(reduce || max === 0 ? 0 : Math.sign(raw) * max * (1 - Math.exp(-Math.abs(raw) / (max * 2.5))));
  };

  const release = () => {
    dragging.current = false;
    setActive(false);
    animate(overflow, 0, { type: "spring", stiffness: 420, damping: 18 });
  };

  const onPointerDown = (e: PointerEvent<HTMLDivElement>) => {
    e.currentTarget.setPointerCapture(e.pointerId);
    dragging.current = true;
    setActive(true);
    follow(e.clientX);
  };

  const onKeyDown = (e: KeyboardEvent<HTMLDivElement>) => {
    const step = e.shiftKey ? 10 : 5;
    const map: Record<string, number> = {
      ArrowRight: value + step,
      ArrowUp: value + step,
      ArrowLeft: value - step,
      ArrowDown: value - step,
      Home: 0,
      End: 100,
    };
    const target = map[e.key];
    if (target === undefined) return;
    e.preventDefault();
    commit(target);
  };

  const big = active || hover;

  return (
    <div className="flex w-[17rem] max-w-full select-none items-center gap-3 text-[#86868b]">
      <motion.span style={{ x: lowX, scale: lowPulse }} className="grid h-5 w-5 shrink-0 place-items-center">
        {value === 0 ? <VolumeX className="h-[18px] w-[18px]" strokeWidth={1.75} /> : <Volume className="h-[18px] w-[18px]" strokeWidth={1.75} />}
      </motion.span>
      <div
        role="slider"
        tabIndex={0}
        aria-label={label}
        aria-valuemin={0}
        aria-valuemax={100}
        aria-valuenow={value}
        onPointerDown={onPointerDown}
        onPointerMove={(e) => dragging.current && follow(e.clientX)}
        onPointerUp={release}
        onPointerCancel={release}
        onPointerEnter={() => setHover(true)}
        onPointerLeave={() => setHover(false)}
        onKeyDown={onKeyDown}
        className="relative flex h-10 flex-1 cursor-grab touch-none items-center rounded-full outline-none focus-visible:ring-2 focus-visible:ring-black/20 active:cursor-grabbing dark:focus-visible:ring-white/30"
      >
        <motion.div
          ref={track}
          className="relative w-full overflow-hidden rounded-full bg-black/[0.08] dark:bg-white/[0.14]"
          style={{ scaleX, scaleY, originX }}
          initial={false}
          animate={{ height: big ? 12 : 6 }}
          transition={{ type: "spring", stiffness: 500, damping: 30 }}
        >
          <motion.div
            className="absolute inset-y-0 left-0"
            style={{ backgroundColor: color }}
            initial={false}
            animate={{ width: value + "%" }}
            transition={active ? { duration: 0 } : { type: "spring", stiffness: 400, damping: 36 }}
          />
        </motion.div>
      </div>
      <motion.span style={{ x: highX, scale: highPulse }} className="grid h-5 w-5 shrink-0 place-items-center">
        <Volume2 className="h-[18px] w-[18px]" strokeWidth={1.75} />
      </motion.span>
    </div>
  );
}
```

## Prompt for AI assistants

Paste this into ChatGPT, Claude, Cursor, v0 or Lovable to adapt the block to your stack (Tailwind, Vue, Svelte…):

````text
I want to add the “Elastic volume slider” block (Microinteractions) from AIMRAN Library to my project.

## What it is
A volume slider with rubber: drag past the end and the bar stretches with resistance, then snaps back when you let go.

## Chosen settings
- Label: "Volume"
- Color: #5e5ce6
- Elasticidad: 28px (from 0 to 48px)

## What I need
1. Add it to my project with the same look and animation as the reference code: same sizes, colours, radii, shadows, timings and easing.
2. It is built with React + TypeScript, with framer-motion for the animation and lucide-react for the icons. If my project uses something else (Vue, Svelte, Astro, plain HTML…), translate it without losing any behaviour. If I use Tailwind, turn the styles into classes; if not, keep the CSS in its own file.
3. Expose the settings above as props (or CSS variables) with those values as defaults.
4. Make it work well on phones: nothing that depends only on hover, touch targets of at least 44 px and no overflow on 320 px screens.
5. Make it look right in light and dark mode.
6. Keep it accessible: semantic HTML, roles and aria-* where needed, visible focus and keyboard support.
7. Respect prefers-reduced-motion: with reduced motion, no big animations but the same end result.

## Reference code
```tsx
import { useRef, useState } from "react";
import type { KeyboardEvent, PointerEvent } from "react";
import { animate, motion, useMotionValue, useReducedMotion, useTransform } from "framer-motion";
import { Volume, Volume2, VolumeX } from "lucide-react";

interface ElasticSliderProps {
  label?: string;
  color?: string;
  stretch?: number;
}

export default function ElasticSlider({
  label = "Volume",
  color = "#5e5ce6",
  stretch = 28,
}: ElasticSliderProps) {
  const [value, setValue] = useState(60);
  const [active, setActive] = useState(false);
  const [hover, setHover] = useState(false);
  const track = useRef<HTMLDivElement>(null);
  const dragging = useRef(false);
  const last = useRef(60);
  const overflow = useMotionValue(0);
  const lowPulse = useMotionValue(1);
  const highPulse = useMotionValue(1);
  const reduce = useReducedMotion();

  const scaleX = useTransform(overflow, (o) => 1 + Math.abs(o) / (track.current?.offsetWidth || 200));
  const scaleY = useTransform(overflow, (o) => 1 - Math.min(Math.abs(o) / 90, 0.3));
  const originX = useTransform(overflow, (o) => (o < 0 ? 1 : 0));
  const lowX = useTransform(overflow, (o) => (o < 0 ? o : 0));
  const highX = useTransform(overflow, (o) => (o > 0 ? o : 0));

  const commit = (next: number) => {
    const v = Math.min(100, Math.max(0, Math.round(next)));
    if (!reduce && v !== last.current) {
      if (v === 0) animate(lowPulse, [1, 1.3, 1], { duration: 0.35 });
      if (v === 100) animate(highPulse, [1, 1.3, 1], { duration: 0.35 });
    }
    last.current = v;
    setValue(v);
  };

  const follow = (clientX: number) => {
    const el = track.current;
    if (!el) return;
    const r = el.getBoundingClientRect();
    commit(((clientX - r.left) / r.width) * 100);
    const raw = clientX < r.left ? clientX - r.left : clientX > r.right ? clientX - r.right : 0;
    const max = Math.max(0, stretch);
    overflow.set(reduce || max === 0 ? 0 : Math.sign(raw) * max * (1 - Math.exp(-Math.abs(raw) / (max * 2.5))));
  };

  const release = () => {
    dragging.current = false;
    setActive(false);
    animate(overflow, 0, { type: "spring", stiffness: 420, damping: 18 });
  };

  const onPointerDown = (e: PointerEvent<HTMLDivElement>) => {
    e.currentTarget.setPointerCapture(e.pointerId);
    dragging.current = true;
    setActive(true);
    follow(e.clientX);
  };

  const onKeyDown = (e: KeyboardEvent<HTMLDivElement>) => {
    const step = e.shiftKey ? 10 : 5;
    const map: Record<string, number> = {
      ArrowRight: value + step,
      ArrowUp: value + step,
      ArrowLeft: value - step,
      ArrowDown: value - step,
      Home: 0,
      End: 100,
    };
    const target = map[e.key];
    if (target === undefined) return;
    e.preventDefault();
    commit(target);
  };

  const big = active || hover;

  return (
    <div className="flex w-[17rem] max-w-full select-none items-center gap-3 text-[#86868b]">
      <motion.span style={{ x: lowX, scale: lowPulse }} className="grid h-5 w-5 shrink-0 place-items-center">
        {value === 0 ? <VolumeX className="h-[18px] w-[18px]" strokeWidth={1.75} /> : <Volume className="h-[18px] w-[18px]" strokeWidth={1.75} />}
      </motion.span>
      <div
        role="slider"
        tabIndex={0}
        aria-label={label}
        aria-valuemin={0}
        aria-valuemax={100}
        aria-valuenow={value}
        onPointerDown={onPointerDown}
        onPointerMove={(e) => dragging.current && follow(e.clientX)}
        onPointerUp={release}
        onPointerCancel={release}
        onPointerEnter={() => setHover(true)}
        onPointerLeave={() => setHover(false)}
        onKeyDown={onKeyDown}
        className="relative flex h-10 flex-1 cursor-grab touch-none items-center rounded-full outline-none focus-visible:ring-2 focus-visible:ring-black/20 active:cursor-grabbing dark:focus-visible:ring-white/30"
      >
        <motion.div
          ref={track}
          className="relative w-full overflow-hidden rounded-full bg-black/[0.08] dark:bg-white/[0.14]"
          style={{ scaleX, scaleY, originX }}
          initial={false}
          animate={{ height: big ? 12 : 6 }}
          transition={{ type: "spring", stiffness: 500, damping: 30 }}
        >
          <motion.div
            className="absolute inset-y-0 left-0"
            style={{ backgroundColor: color }}
            initial={false}
            animate={{ width: value + "%" }}
            transition={active ? { duration: 0 } : { type: "spring", stiffness: 400, damping: 36 }}
          />
        </motion.div>
      </div>
      <motion.span style={{ x: highX, scale: highPulse }} className="grid h-5 w-5 shrink-0 place-items-center">
        <Volume2 className="h-[18px] w-[18px]" strokeWidth={1.75} />
      </motion.span>
    </div>
  );
}
```

Give me the complete final code, ready to paste, and tell me in one line where to put it in my project.
````