# Segmented control with a hop

> A gradient indicator that hops up and lands on the new option, like a small ball bouncing across.

- Category: [Filters](https://library.aimran.es/components/filters)
- Built with: HTML + CSS
- Live editor: https://library.aimran.es/blocks/uv-f-seg-jump
- Library: AIMRAN Library (https://library.aimran.es), free, no sign-up, by Aimran Oukham

## Where to use it

This control has a playful streak that suits consumer apps. Picture a restaurant finder where people flip between New, Top rated and Nearby, or a community feed sorting its posts. The hop makes switching feel light and a bit fun. A nice option if you want an animated segmented control or toggle tabs that don't look corporate.

Leave some room above the control, because the indicator rises briefly and can clip under a header. Keep it out of banking apps or admin panels, where calm beats cheerful. Short labels work best here.

## Code

### HTML

```html
<div class="uv-fsj"><span class="p"></span><button class="on">New</button><button>Top</button><button>Nearby</button></div>
```

### CSS

```css
.uv-fsj {
  --c1: #0071e3;
  --c2: #8ec5ff;
  --s: 16px;
  /* tamaño */
  --k: 1;
  /* velocidad */
  --fg: #1d1d1f;
  /* texto */
  --bg: #f5f5f7;
  /* fondo */
}

.uv-fsj {
  font-family: -apple-system,BlinkMacSystemFont,"SF Pro Text","Inter",system-ui,sans-serif;
  font-size: var(--s);
  color: var(--fg);
  -webkit-tap-highlight-color: transparent;
  position: relative;
  display: inline-flex;
  padding: .3em;
  border-radius: 999px;
  background: color-mix(in srgb,var(--fg) 8%,transparent);
}

.uv-fsj button {
  font-family: -apple-system,BlinkMacSystemFont,"SF Pro Text","Inter",system-ui,sans-serif;
  font-size: var(--s);
  font-weight: 550;
  line-height: 1;
  padding: .72em 1.25em;
  border: 0;
  border-radius: 999px;
  cursor: pointer;
  background: transparent;
  color: var(--fg);
  position: relative;
  transition: color calc(0.32s / var(--k)) cubic-bezier(.25,.1,.25,1),transform calc(0.32s / var(--k)) cubic-bezier(.34,1.56,.64,1);
  z-index: 1;
}

.uv-fsj button.on {
  color: #fff;
}

.uv-fsj .p {
  position: absolute;
  top: .3em;
  left: 0;
  height: calc(100% - .6em);
  border-radius: 999px;
  background: linear-gradient(135deg,var(--c1),var(--c2));
  box-shadow: 0 8px 20px color-mix(in srgb,var(--c1) 38%,transparent);
  transition: transform calc(0.45s / var(--k)) cubic-bezier(.34,1.56,.64,1),width calc(0.45s / var(--k)) cubic-bezier(.34,1.56,.64,1);
}

.uv-fsj .p.jp {
  animation: uv-fsj calc(0.45s / var(--k)) cubic-bezier(.34,1.56,.64,1);
}

@keyframes uv-fsj {
  0% {
    translate: 0 0;
    scale: 1 1;
  }
  40% {
    translate: 0 -.5em;
    scale: .92 1.1;
  }
  100% {
    translate: 0 0;
    scale: 1 1;
  }
}
```

### JavaScript

```js
document.querySelectorAll(".uv-fsj").forEach(el => {
  const p=el.querySelector(".p"),bs=[...el.querySelectorAll("button")];const mv=b=>{p.style.width=b.offsetWidth+"px";p.style.transform="translateX("+b.offsetLeft+"px)"};bs.forEach(b=>b.addEventListener("click",()=>{bs.forEach(x=>x.classList.remove("on"));b.classList.add("on");mv(b);p.classList.remove("jp");void p.offsetWidth;p.classList.add("jp")}));requestAnimationFrame(()=>mv(el.querySelector("button.on")))
});
```

### React

```tsx
// @ts-nocheck: setup() es JavaScript del DOM sin tipos, el mismo de la pestaña JS.
import { useEffect, useRef, type CSSProperties } from "react";

const css = `
.uv-fsj {
  font-family: -apple-system,BlinkMacSystemFont,"SF Pro Text","Inter",system-ui,sans-serif;
  font-size: var(--s);
  color: var(--fg);
  -webkit-tap-highlight-color: transparent;
  position: relative;
  display: inline-flex;
  padding: .3em;
  border-radius: 999px;
  background: color-mix(in srgb,var(--fg) 8%,transparent);
}

.uv-fsj button {
  font-family: -apple-system,BlinkMacSystemFont,"SF Pro Text","Inter",system-ui,sans-serif;
  font-size: var(--s);
  font-weight: 550;
  line-height: 1;
  padding: .72em 1.25em;
  border: 0;
  border-radius: 999px;
  cursor: pointer;
  background: transparent;
  color: var(--fg);
  position: relative;
  transition: color calc(0.32s / var(--k)) cubic-bezier(.25,.1,.25,1),transform calc(0.32s / var(--k)) cubic-bezier(.34,1.56,.64,1);
  z-index: 1;
}

.uv-fsj button.on {
  color: #fff;
}

.uv-fsj .p {
  position: absolute;
  top: .3em;
  left: 0;
  height: calc(100% - .6em);
  border-radius: 999px;
  background: linear-gradient(135deg,var(--c1),var(--c2));
  box-shadow: 0 8px 20px color-mix(in srgb,var(--c1) 38%,transparent);
  transition: transform calc(0.45s / var(--k)) cubic-bezier(.34,1.56,.64,1),width calc(0.45s / var(--k)) cubic-bezier(.34,1.56,.64,1);
}

.uv-fsj .p.jp {
  animation: uv-fsj calc(0.45s / var(--k)) cubic-bezier(.34,1.56,.64,1);
}

@keyframes uv-fsj {
  0% {
    translate: 0 0;
    scale: 1 1;
  }
  40% {
    translate: 0 -.5em;
    scale: .92 1.1;
  }
  100% {
    translate: 0 0;
    scale: 1 1;
  }
}
`;

// Interacción en JavaScript del DOM: la misma que en la pestaña JS.
// eslint-disable-next-line @typescript-eslint/no-explicit-any
function setup(el: any) {
  const p=el.querySelector(".p"),bs=[...el.querySelectorAll("button")];const mv=b=>{p.style.width=b.offsetWidth+"px";p.style.transform="translateX("+b.offsetLeft+"px)"};bs.forEach(b=>b.addEventListener("click",()=>{bs.forEach(x=>x.classList.remove("on"));b.classList.add("on");mv(b);p.classList.remove("jp");void p.offsetWidth;p.classList.add("jp")}));requestAnimationFrame(()=>mv(el.querySelector("button.on")))
}

export default function FSegJump() {
  const ref = useRef<HTMLDivElement>(null);

  useEffect(() => {
    const el = ref.current?.firstElementChild;
    return el ? setup(el) : undefined;
  }, []);

  return (
    <>
      <style>{css}</style>
      <div
        ref={ref} style={{
          "--c1": "#0071e3",
          "--c2": "#8ec5ff",
          "--s": "16px",
          "--k": "1",
          "--fg": "#1d1d1f",
          "--bg": "#f5f5f7",
        } as CSSProperties}
      >
        <div className="uv-fsj"><span className="p"></span><button className="on">New</button><button>Top</button><button>Nearby</button></div>
      </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 “Segmented control with a hop” block (Filters) from AIMRAN Library to my project.

## What it is
A gradient indicator that hops up and lands on the new option, like a small ball bouncing across.

## Chosen settings
- Main color: #0071e3
- Secondary color: #8ec5ff
- Size: 16px (from 12 to 24px)
- Speed: 1x (from 0.5 to 2x)

## 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 plain HTML and CSS (the reference wraps it in a React component with its CSS). 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
// @ts-nocheck: setup() es JavaScript del DOM sin tipos, el mismo de la pestaña JS.
import { useEffect, useRef, type CSSProperties } from "react";

const css = `
.uv-fsj {
  font-family: -apple-system,BlinkMacSystemFont,"SF Pro Text","Inter",system-ui,sans-serif;
  font-size: var(--s);
  color: var(--fg);
  -webkit-tap-highlight-color: transparent;
  position: relative;
  display: inline-flex;
  padding: .3em;
  border-radius: 999px;
  background: color-mix(in srgb,var(--fg) 8%,transparent);
}

.uv-fsj button {
  font-family: -apple-system,BlinkMacSystemFont,"SF Pro Text","Inter",system-ui,sans-serif;
  font-size: var(--s);
  font-weight: 550;
  line-height: 1;
  padding: .72em 1.25em;
  border: 0;
  border-radius: 999px;
  cursor: pointer;
  background: transparent;
  color: var(--fg);
  position: relative;
  transition: color calc(0.32s / var(--k)) cubic-bezier(.25,.1,.25,1),transform calc(0.32s / var(--k)) cubic-bezier(.34,1.56,.64,1);
  z-index: 1;
}

.uv-fsj button.on {
  color: #fff;
}

.uv-fsj .p {
  position: absolute;
  top: .3em;
  left: 0;
  height: calc(100% - .6em);
  border-radius: 999px;
  background: linear-gradient(135deg,var(--c1),var(--c2));
  box-shadow: 0 8px 20px color-mix(in srgb,var(--c1) 38%,transparent);
  transition: transform calc(0.45s / var(--k)) cubic-bezier(.34,1.56,.64,1),width calc(0.45s / var(--k)) cubic-bezier(.34,1.56,.64,1);
}

.uv-fsj .p.jp {
  animation: uv-fsj calc(0.45s / var(--k)) cubic-bezier(.34,1.56,.64,1);
}

@keyframes uv-fsj {
  0% {
    translate: 0 0;
    scale: 1 1;
  }
  40% {
    translate: 0 -.5em;
    scale: .92 1.1;
  }
  100% {
    translate: 0 0;
    scale: 1 1;
  }
}
`;

// Interacción en JavaScript del DOM: la misma que en la pestaña JS.
// eslint-disable-next-line @typescript-eslint/no-explicit-any
function setup(el: any) {
  const p=el.querySelector(".p"),bs=[...el.querySelectorAll("button")];const mv=b=>{p.style.width=b.offsetWidth+"px";p.style.transform="translateX("+b.offsetLeft+"px)"};bs.forEach(b=>b.addEventListener("click",()=>{bs.forEach(x=>x.classList.remove("on"));b.classList.add("on");mv(b);p.classList.remove("jp");void p.offsetWidth;p.classList.add("jp")}));requestAnimationFrame(()=>mv(el.querySelector("button.on")))
}

export default function FSegJump() {
  const ref = useRef<HTMLDivElement>(null);

  useEffect(() => {
    const el = ref.current?.firstElementChild;
    return el ? setup(el) : undefined;
  }, []);

  return (
    <>
      <style>{css}</style>
      <div
        ref={ref} style={{
          "--c1": "#0071e3",
          "--c2": "#8ec5ff",
          "--s": "16px",
          "--k": "1",
          "--fg": "#1d1d1f",
          "--bg": "#f5f5f7",
        } as CSSProperties}
      >
        <div className="uv-fsj"><span className="p"></span><button className="on">New</button><button>Top</button><button>Nearby</button></div>
      </div>
    </>
  );
}
```

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