# ON / OFF toggle

> A switch that spells out its state, with ON and OFF sliding in and out beside the knob.

- Category: [Toggles](https://library.aimran.es/components/toggles)
- Built with: HTML + CSS
- Live editor: https://library.aimran.es/blocks/uv-tg-text
- Library: AIMRAN Library (https://library.aimran.es), free, no sign-up, by Aimran Oukham

## Where to use it

Some switches need to say what they are doing, not just show a color. This ON/OFF toggle fits admin panels and billing screens: “Maintenance mode” in a CMS, “Auto-renew” on a subscription page or “Two-factor login” in security settings. The words slide in with the knob, so nobody has to guess whether blue means on.

It also helps people who don't tell colors apart easily. Keep the labels to two or three letters, like ON and OFF or YES and NO; longer words won't fit inside the track. You can translate them straight in the HTML.

## Code

### HTML

```html
<label class="uv-tt"><input type="checkbox" checked><span><em>ON</em><em>OFF</em></span></label>
```

### CSS

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

.uv-tt {
  font-family: -apple-system,BlinkMacSystemFont,"SF Pro Text","Inter",system-ui,sans-serif;
  display: inline-block;
  font-size: var(--s);
  cursor: pointer;
}

.uv-tt input {
  display: none;
}

.uv-tt span {
  position: relative;
  display: block;
  width: 4.2em;
  height: 2em;
  overflow: hidden;
  border-radius: 999px;
  background: color-mix(in srgb,var(--fg) 18%,transparent);
  transition: background calc(0.35s / var(--k)) cubic-bezier(.25,.1,.25,1);
}

.uv-tt span::after {
  content: "";
  position: absolute;
  left: .2em;
  top: .2em;
  width: 1.6em;
  height: 1.6em;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 2px 6px rgba(0,0,0,.25);
  transition: transform calc(0.4s / var(--k)) cubic-bezier(.34,1.56,.64,1);
}

.uv-tt em {
  position: absolute;
  top: 50%;
  font-style: normal;
  font-size: .55em;
  font-weight: 700;
  letter-spacing: .05em;
  color: #fff;
  translate: 0 -50%;
  transition: transform calc(0.4s / var(--k)) cubic-bezier(.34,1.56,.64,1),opacity calc(0.3s / var(--k));
}

.uv-tt em:first-child {
  left: 1em;
  transform: translateX(-2em);
  opacity: 0;
}

.uv-tt em:last-child {
  right: 1em;
  color: var(--fg);
  opacity: .6;
}

.uv-tt input:checked+span {
  background: var(--c1);
}

.uv-tt input:checked+span::after {
  transform: translateX(2.2em);
}

.uv-tt input:checked+span em:first-child {
  transform: none;
  opacity: 1;
}

.uv-tt input:checked+span em:last-child {
  transform: translateX(2em);
  opacity: 0;
}
```

### React

```tsx
import type { CSSProperties } from "react";

const css = `
.uv-tt {
  font-family: -apple-system,BlinkMacSystemFont,"SF Pro Text","Inter",system-ui,sans-serif;
  display: inline-block;
  font-size: var(--s);
  cursor: pointer;
}

.uv-tt input {
  display: none;
}

.uv-tt span {
  position: relative;
  display: block;
  width: 4.2em;
  height: 2em;
  overflow: hidden;
  border-radius: 999px;
  background: color-mix(in srgb,var(--fg) 18%,transparent);
  transition: background calc(0.35s / var(--k)) cubic-bezier(.25,.1,.25,1);
}

.uv-tt span::after {
  content: "";
  position: absolute;
  left: .2em;
  top: .2em;
  width: 1.6em;
  height: 1.6em;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 2px 6px rgba(0,0,0,.25);
  transition: transform calc(0.4s / var(--k)) cubic-bezier(.34,1.56,.64,1);
}

.uv-tt em {
  position: absolute;
  top: 50%;
  font-style: normal;
  font-size: .55em;
  font-weight: 700;
  letter-spacing: .05em;
  color: #fff;
  translate: 0 -50%;
  transition: transform calc(0.4s / var(--k)) cubic-bezier(.34,1.56,.64,1),opacity calc(0.3s / var(--k));
}

.uv-tt em:first-child {
  left: 1em;
  transform: translateX(-2em);
  opacity: 0;
}

.uv-tt em:last-child {
  right: 1em;
  color: var(--fg);
  opacity: .6;
}

.uv-tt input:checked+span {
  background: var(--c1);
}

.uv-tt input:checked+span::after {
  transform: translateX(2.2em);
}

.uv-tt input:checked+span em:first-child {
  transform: none;
  opacity: 1;
}

.uv-tt input:checked+span em:last-child {
  transform: translateX(2em);
  opacity: 0;
}
`;

export default function TgText() {
  return (
    <>
      <style>{css}</style>
      <div
        style={{
          "--c1": "#0071e3",
          "--c2": "#8ec5ff",
          "--s": "16px",
          "--k": "1",
          "--fg": "#1d1d1f",
          "--bg": "#f5f5f7",
        } as CSSProperties}
      >
        <label className="uv-tt"><input type="checkbox" checked={true} /><span><em>ON</em><em>OFF</em></span></label>
      </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 “ON / OFF toggle” block (Toggles) from AIMRAN Library to my project.

## What it is
A switch that spells out its state, with ON and OFF sliding in and out beside the knob.

## 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
import type { CSSProperties } from "react";

const css = `
.uv-tt {
  font-family: -apple-system,BlinkMacSystemFont,"SF Pro Text","Inter",system-ui,sans-serif;
  display: inline-block;
  font-size: var(--s);
  cursor: pointer;
}

.uv-tt input {
  display: none;
}

.uv-tt span {
  position: relative;
  display: block;
  width: 4.2em;
  height: 2em;
  overflow: hidden;
  border-radius: 999px;
  background: color-mix(in srgb,var(--fg) 18%,transparent);
  transition: background calc(0.35s / var(--k)) cubic-bezier(.25,.1,.25,1);
}

.uv-tt span::after {
  content: "";
  position: absolute;
  left: .2em;
  top: .2em;
  width: 1.6em;
  height: 1.6em;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 2px 6px rgba(0,0,0,.25);
  transition: transform calc(0.4s / var(--k)) cubic-bezier(.34,1.56,.64,1);
}

.uv-tt em {
  position: absolute;
  top: 50%;
  font-style: normal;
  font-size: .55em;
  font-weight: 700;
  letter-spacing: .05em;
  color: #fff;
  translate: 0 -50%;
  transition: transform calc(0.4s / var(--k)) cubic-bezier(.34,1.56,.64,1),opacity calc(0.3s / var(--k));
}

.uv-tt em:first-child {
  left: 1em;
  transform: translateX(-2em);
  opacity: 0;
}

.uv-tt em:last-child {
  right: 1em;
  color: var(--fg);
  opacity: .6;
}

.uv-tt input:checked+span {
  background: var(--c1);
}

.uv-tt input:checked+span::after {
  transform: translateX(2.2em);
}

.uv-tt input:checked+span em:first-child {
  transform: none;
  opacity: 1;
}

.uv-tt input:checked+span em:last-child {
  transform: translateX(2em);
  opacity: 0;
}
`;

export default function TgText() {
  return (
    <>
      <style>{css}</style>
      <div
        style={{
          "--c1": "#0071e3",
          "--c2": "#8ec5ff",
          "--s": "16px",
          "--k": "1",
          "--fg": "#1d1d1f",
          "--bg": "#f5f5f7",
        } as CSSProperties}
      >
        <label className="uv-tt"><input type="checkbox" checked={true} /><span><em>ON</em><em>OFF</em></span></label>
      </div>
    </>
  );
}
```

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