# Neon glow toggle

> A dim outlined switch that lights up with a colored glow around the track and the knob when turned on.

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

## Where to use it

This neon toggle switch looks like a light being turned on, which makes it a natural fit for a smart home dashboard (“Living room lights”), the RGB settings of a gaming keyboard app or the “Night mode” of a music player. Off, it is a quiet grey outline. On, both the track and the knob glow in your colors.

The difference between off and on is very clear, so nobody misreads the state. It really needs a dark background to shine; on white the glow looks washed out. Use the second color for the halo around the knob.

## Code

### HTML

```html
<label class="uv-tn"><input type="checkbox" checked><span></span></label>
```

### CSS

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

.uv-tn {
  display: inline-block;
  font-size: var(--s);
  cursor: pointer;
}

.uv-tn input {
  display: none;
}

.uv-tn span {
  position: relative;
  display: block;
  width: 3.6em;
  height: 1.8em;
  border-radius: 999px;
  box-shadow: inset 0 0 0 2px color-mix(in srgb,var(--fg) 25%,transparent);
  transition: all calc(0.4s / var(--k)) cubic-bezier(.25,.1,.25,1);
}

.uv-tn span::after {
  content: "";
  position: absolute;
  left: .3em;
  top: .3em;
  width: 1.2em;
  height: 1.2em;
  border-radius: 50%;
  background: color-mix(in srgb,var(--fg) 35%,transparent);
  transition: all calc(0.4s / var(--k)) cubic-bezier(.34,1.56,.64,1);
}

.uv-tn input:checked+span {
  box-shadow: inset 0 0 0 2px var(--c1),0 0 .6em var(--c1),inset 0 0 .6em color-mix(in srgb,var(--c1) 50%,transparent);
}

.uv-tn input:checked+span::after {
  left: calc(100% - 1.5em);
  background: var(--c1);
  box-shadow: 0 0 .5em var(--c1),0 0 1.2em var(--c2);
}
```

### React

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

const css = `
.uv-tn {
  display: inline-block;
  font-size: var(--s);
  cursor: pointer;
}

.uv-tn input {
  display: none;
}

.uv-tn span {
  position: relative;
  display: block;
  width: 3.6em;
  height: 1.8em;
  border-radius: 999px;
  box-shadow: inset 0 0 0 2px color-mix(in srgb,var(--fg) 25%,transparent);
  transition: all calc(0.4s / var(--k)) cubic-bezier(.25,.1,.25,1);
}

.uv-tn span::after {
  content: "";
  position: absolute;
  left: .3em;
  top: .3em;
  width: 1.2em;
  height: 1.2em;
  border-radius: 50%;
  background: color-mix(in srgb,var(--fg) 35%,transparent);
  transition: all calc(0.4s / var(--k)) cubic-bezier(.34,1.56,.64,1);
}

.uv-tn input:checked+span {
  box-shadow: inset 0 0 0 2px var(--c1),0 0 .6em var(--c1),inset 0 0 .6em color-mix(in srgb,var(--c1) 50%,transparent);
}

.uv-tn input:checked+span::after {
  left: calc(100% - 1.5em);
  background: var(--c1);
  box-shadow: 0 0 .5em var(--c1),0 0 1.2em var(--c2);
}
`;

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

## What it is
A dim outlined switch that lights up with a colored glow around the track and the knob when turned on.

## 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-tn {
  display: inline-block;
  font-size: var(--s);
  cursor: pointer;
}

.uv-tn input {
  display: none;
}

.uv-tn span {
  position: relative;
  display: block;
  width: 3.6em;
  height: 1.8em;
  border-radius: 999px;
  box-shadow: inset 0 0 0 2px color-mix(in srgb,var(--fg) 25%,transparent);
  transition: all calc(0.4s / var(--k)) cubic-bezier(.25,.1,.25,1);
}

.uv-tn span::after {
  content: "";
  position: absolute;
  left: .3em;
  top: .3em;
  width: 1.2em;
  height: 1.2em;
  border-radius: 50%;
  background: color-mix(in srgb,var(--fg) 35%,transparent);
  transition: all calc(0.4s / var(--k)) cubic-bezier(.34,1.56,.64,1);
}

.uv-tn input:checked+span {
  box-shadow: inset 0 0 0 2px var(--c1),0 0 .6em var(--c1),inset 0 0 .6em color-mix(in srgb,var(--c1) 50%,transparent);
}

.uv-tn input:checked+span::after {
  left: calc(100% - 1.5em);
  background: var(--c1);
  box-shadow: 0 0 .5em var(--c1),0 0 1.2em var(--c2);
}
`;

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