# Checkbox with particle burst

> Eight little sparks fly out from the box the moment you tick it, like a tiny celebration.

- Category: [Checkboxes](https://library.aimran.es/components/checkboxes)
- Built with: HTML + CSS
- Live editor: https://library.aimran.es/blocks/uv-ck2-burst
- Library: AIMRAN Library (https://library.aimran.es), free, no sign-up, by Aimran Oukham

## Where to use it

Sparks make sense when ticking something is a small win or a sign of affection: the “Like” on a recipe, adding a product to a wishlist or marking today’s habit as done in a tracker app. The burst rewards the click and invites people to do it again. A checkbox with a particle animation, written in HTML and CSS.

Keep it away from serious forms. Nobody wants confetti when agreeing to a privacy policy or choosing an insurance option. The sparks take the accent colour, so they also read well on dark backgrounds.

## Code

### HTML

```html
<label class="uv-ck2b"><input type="checkbox"><span class="bx"><svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round"><path d="M5 12.5l4.5 4.5L19 7.5" pathLength="1"/></svg><em><b style="--a:0deg"></b><b style="--a:45deg"></b><b style="--a:90deg"></b><b style="--a:135deg"></b><b style="--a:180deg"></b><b style="--a:225deg"></b><b style="--a:270deg"></b><b style="--a:315deg"></b></em></span>Like</label>
```

### CSS

```css
.uv-ck2b {
  --c1: #0071e3;
  --c2: #8ec5ff;
  --s: 16px;
  /* tamaño */
  --k: 1;
  /* velocidad */
  --fg: #1d1d1f;
  /* texto */
  --bg: #f5f5f7;
  /* fondo */
}

.uv-ck2b {
  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;
  display: inline-flex;
  align-items: center;
  gap: .7em;
  cursor: pointer;
  user-select: none;
  font-weight: 500;
}

.uv-ck2b input {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
  pointer-events: none;
}

.uv-ck2b .bx {
  position: relative;
  display: grid;
  place-items: center;
  width: 1.5em;
  height: 1.5em;
  border-radius: .45em;
  box-shadow: inset 0 0 0 2px color-mix(in srgb,var(--fg) 22%,transparent);
  transition: background calc(0.25s / var(--k)) cubic-bezier(.25,.1,.25,1),box-shadow calc(0.25s / var(--k)) cubic-bezier(.25,.1,.25,1);
}

.uv-ck2b svg {
  width: 1em;
  height: 1em;
  color: #fff;
}

.uv-ck2b svg path {
  stroke-dasharray: 1;
  stroke-dashoffset: 1;
  transition: stroke-dashoffset calc(0.3s / var(--k)) cubic-bezier(.25,.1,.25,1);
}

.uv-ck2b em {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.uv-ck2b em b {
  position: absolute;
  left: 50%;
  top: 50%;
  width: .22em;
  height: .22em;
  margin: -.11em;
  border-radius: 50%;
  background: var(--c1);
  opacity: 0;
}

.uv-ck2b:hover .bx {
  box-shadow: inset 0 0 0 2px var(--c1);
}

.uv-ck2b input:checked + .bx {
  background: var(--c1);
  box-shadow: inset 0 0 0 2px var(--c1);
  animation: uv-ck2b-p calc(0.45s / var(--k)) cubic-bezier(.34,1.56,.64,1);
}

.uv-ck2b input:checked + .bx svg path {
  stroke-dashoffset: 0;
}

.uv-ck2b input:checked + .bx em b {
  animation: uv-ck2b calc(0.6s / var(--k)) cubic-bezier(.25,.1,.25,1) forwards;
}

@keyframes uv-ck2b {
  0% {
    opacity: 1;
    transform: rotate(var(--a)) translateY(0) scale(1);
  }
  100% {
    opacity: 0;
    transform: rotate(var(--a)) translateY(-1.5em) scale(.3);
  }
}

@keyframes uv-ck2b-p {
  0% {
    scale: 1;
  }
  40% {
    scale: 1.2;
  }
  100% {
    scale: 1;
  }
}
```

### React

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

const css = `
.uv-ck2b {
  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;
  display: inline-flex;
  align-items: center;
  gap: .7em;
  cursor: pointer;
  user-select: none;
  font-weight: 500;
}

.uv-ck2b input {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
  pointer-events: none;
}

.uv-ck2b .bx {
  position: relative;
  display: grid;
  place-items: center;
  width: 1.5em;
  height: 1.5em;
  border-radius: .45em;
  box-shadow: inset 0 0 0 2px color-mix(in srgb,var(--fg) 22%,transparent);
  transition: background calc(0.25s / var(--k)) cubic-bezier(.25,.1,.25,1),box-shadow calc(0.25s / var(--k)) cubic-bezier(.25,.1,.25,1);
}

.uv-ck2b svg {
  width: 1em;
  height: 1em;
  color: #fff;
}

.uv-ck2b svg path {
  stroke-dasharray: 1;
  stroke-dashoffset: 1;
  transition: stroke-dashoffset calc(0.3s / var(--k)) cubic-bezier(.25,.1,.25,1);
}

.uv-ck2b em {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.uv-ck2b em b {
  position: absolute;
  left: 50%;
  top: 50%;
  width: .22em;
  height: .22em;
  margin: -.11em;
  border-radius: 50%;
  background: var(--c1);
  opacity: 0;
}

.uv-ck2b:hover .bx {
  box-shadow: inset 0 0 0 2px var(--c1);
}

.uv-ck2b input:checked + .bx {
  background: var(--c1);
  box-shadow: inset 0 0 0 2px var(--c1);
  animation: uv-ck2b-p calc(0.45s / var(--k)) cubic-bezier(.34,1.56,.64,1);
}

.uv-ck2b input:checked + .bx svg path {
  stroke-dashoffset: 0;
}

.uv-ck2b input:checked + .bx em b {
  animation: uv-ck2b calc(0.6s / var(--k)) cubic-bezier(.25,.1,.25,1) forwards;
}

@keyframes uv-ck2b {
  0% {
    opacity: 1;
    transform: rotate(var(--a)) translateY(0) scale(1);
  }
  100% {
    opacity: 0;
    transform: rotate(var(--a)) translateY(-1.5em) scale(.3);
  }
}

@keyframes uv-ck2b-p {
  0% {
    scale: 1;
  }
  40% {
    scale: 1.2;
  }
  100% {
    scale: 1;
  }
}
`;

export default function Ck2Burst() {
  return (
    <>
      <style>{css}</style>
      <div
        style={{
          "--c1": "#0071e3",
          "--c2": "#8ec5ff",
          "--s": "16px",
          "--k": "1",
          "--fg": "#1d1d1f",
          "--bg": "#f5f5f7",
        } as CSSProperties}
      >
        <label className="uv-ck2b"><input type="checkbox" /><span className="bx"><svg viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="3" strokeLinecap="round" strokeLinejoin="round"><path d="M5 12.5l4.5 4.5L19 7.5" pathLength="1" /></svg><em><b style={{ "--a": "0deg" } as CSSProperties}></b><b style={{ "--a": "45deg" } as CSSProperties}></b><b style={{ "--a": "90deg" } as CSSProperties}></b><b style={{ "--a": "135deg" } as CSSProperties}></b><b style={{ "--a": "180deg" } as CSSProperties}></b><b style={{ "--a": "225deg" } as CSSProperties}></b><b style={{ "--a": "270deg" } as CSSProperties}></b><b style={{ "--a": "315deg" } as CSSProperties}></b></em></span>Like</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 “Checkbox with particle burst” block (Checkboxes) from AIMRAN Library to my project.

## What it is
Eight little sparks fly out from the box the moment you tick it, like a tiny celebration.

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

## 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-ck2b {
  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;
  display: inline-flex;
  align-items: center;
  gap: .7em;
  cursor: pointer;
  user-select: none;
  font-weight: 500;
}

.uv-ck2b input {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
  pointer-events: none;
}

.uv-ck2b .bx {
  position: relative;
  display: grid;
  place-items: center;
  width: 1.5em;
  height: 1.5em;
  border-radius: .45em;
  box-shadow: inset 0 0 0 2px color-mix(in srgb,var(--fg) 22%,transparent);
  transition: background calc(0.25s / var(--k)) cubic-bezier(.25,.1,.25,1),box-shadow calc(0.25s / var(--k)) cubic-bezier(.25,.1,.25,1);
}

.uv-ck2b svg {
  width: 1em;
  height: 1em;
  color: #fff;
}

.uv-ck2b svg path {
  stroke-dasharray: 1;
  stroke-dashoffset: 1;
  transition: stroke-dashoffset calc(0.3s / var(--k)) cubic-bezier(.25,.1,.25,1);
}

.uv-ck2b em {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.uv-ck2b em b {
  position: absolute;
  left: 50%;
  top: 50%;
  width: .22em;
  height: .22em;
  margin: -.11em;
  border-radius: 50%;
  background: var(--c1);
  opacity: 0;
}

.uv-ck2b:hover .bx {
  box-shadow: inset 0 0 0 2px var(--c1);
}

.uv-ck2b input:checked + .bx {
  background: var(--c1);
  box-shadow: inset 0 0 0 2px var(--c1);
  animation: uv-ck2b-p calc(0.45s / var(--k)) cubic-bezier(.34,1.56,.64,1);
}

.uv-ck2b input:checked + .bx svg path {
  stroke-dashoffset: 0;
}

.uv-ck2b input:checked + .bx em b {
  animation: uv-ck2b calc(0.6s / var(--k)) cubic-bezier(.25,.1,.25,1) forwards;
}

@keyframes uv-ck2b {
  0% {
    opacity: 1;
    transform: rotate(var(--a)) translateY(0) scale(1);
  }
  100% {
    opacity: 0;
    transform: rotate(var(--a)) translateY(-1.5em) scale(.3);
  }
}

@keyframes uv-ck2b-p {
  0% {
    scale: 1;
  }
  40% {
    scale: 1.2;
  }
  100% {
    scale: 1;
  }
}
`;

export default function Ck2Burst() {
  return (
    <>
      <style>{css}</style>
      <div
        style={{
          "--c1": "#0071e3",
          "--c2": "#8ec5ff",
          "--s": "16px",
          "--k": "1",
          "--fg": "#1d1d1f",
          "--bg": "#f5f5f7",
        } as CSSProperties}
      >
        <label className="uv-ck2b"><input type="checkbox" /><span className="bx"><svg viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="3" strokeLinecap="round" strokeLinejoin="round"><path d="M5 12.5l4.5 4.5L19 7.5" pathLength="1" /></svg><em><b style={{ "--a": "0deg" } as CSSProperties}></b><b style={{ "--a": "45deg" } as CSSProperties}></b><b style={{ "--a": "90deg" } as CSSProperties}></b><b style={{ "--a": "135deg" } as CSSProperties}></b><b style={{ "--a": "180deg" } as CSSProperties}></b><b style={{ "--a": "225deg" } as CSSProperties}></b><b style={{ "--a": "270deg" } as CSSProperties}></b><b style={{ "--a": "315deg" } as CSSProperties}></b></em></span>Like</label>
      </div>
    </>
  );
}
```

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