Checkbox

<fieldset class="kodza-checkbox">
  <legend class="kodza-checkbox__legend">Email me about</legend>
  <label class="kodza-checkbox__item kodza-checkbox__item--all">
    <input class="kodza-checkbox__input" type="checkbox" data-all>
    <span class="kodza-checkbox__box" aria-hidden="true"><svg viewBox="0 0 16 16"><path class="kodza-checkbox__tick" d="M3.5 8.5l3 3 6-7" pathLength="1"/><path class="kodza-checkbox__dash" d="M4 8h8" pathLength="1"/></svg></span>
    <span class="kodza-checkbox__text">Everything</span>
  </label>
  <label class="kodza-checkbox__item">
    <input class="kodza-checkbox__input" type="checkbox" name="topics" value="components" checked>
    <span class="kodza-checkbox__box" aria-hidden="true"><svg viewBox="0 0 16 16"><path class="kodza-checkbox__tick" d="M3.5 8.5l3 3 6-7" pathLength="1"/><path class="kodza-checkbox__dash" d="M4 8h8" pathLength="1"/></svg></span>
    <span class="kodza-checkbox__text">New components<small>Every Tuesday, give or take a deploy.</small></span>
  </label>
  <label class="kodza-checkbox__item">
    <input class="kodza-checkbox__input" type="checkbox" name="topics" value="changelog">
    <span class="kodza-checkbox__box" aria-hidden="true"><svg viewBox="0 0 16 16"><path class="kodza-checkbox__tick" d="M3.5 8.5l3 3 6-7" pathLength="1"/><path class="kodza-checkbox__dash" d="M4 8h8" pathLength="1"/></svg></span>
    <span class="kodza-checkbox__text">The changelog<small>What broke, what we fixed, who to blame.</small></span>
  </label>
  <label class="kodza-checkbox__item">
    <input class="kodza-checkbox__input" type="checkbox" name="topics" value="memes" disabled>
    <span class="kodza-checkbox__box" aria-hidden="true"><svg viewBox="0 0 16 16"><path class="kodza-checkbox__tick" d="M3.5 8.5l3 3 6-7" pathLength="1"/><path class="kodza-checkbox__dash" d="M4 8h8" pathLength="1"/></svg></span>
    <span class="kodza-checkbox__text">Memes<small>Not available in your region. Or any region.</small></span>
  </label>
</fieldset>

<fieldset class="kodza-checkbox kodza-checkbox--cards">
  <legend class="kodza-checkbox__legend">Your stack</legend>
  <label class="kodza-checkbox__item">
    <input class="kodza-checkbox__input" type="checkbox" name="stack" value="html" checked>
    <span class="kodza-checkbox__box" aria-hidden="true"><svg viewBox="0 0 16 16"><path class="kodza-checkbox__tick" d="M3.5 8.5l3 3 6-7" pathLength="1"/><path class="kodza-checkbox__dash" d="M4 8h8" pathLength="1"/></svg></span>
    <span class="kodza-checkbox__text">HTML<small>The classic.</small></span>
  </label>
  <label class="kodza-checkbox__item">
    <input class="kodza-checkbox__input" type="checkbox" name="stack" value="css">
    <span class="kodza-checkbox__box" aria-hidden="true"><svg viewBox="0 0 16 16"><path class="kodza-checkbox__tick" d="M3.5 8.5l3 3 6-7" pathLength="1"/><path class="kodza-checkbox__dash" d="M4 8h8" pathLength="1"/></svg></span>
    <span class="kodza-checkbox__text">CSS<small>Cascading on purpose.</small></span>
  </label>
  <label class="kodza-checkbox__item">
    <input class="kodza-checkbox__input" type="checkbox" name="stack" value="js">
    <span class="kodza-checkbox__box" aria-hidden="true"><svg viewBox="0 0 16 16"><path class="kodza-checkbox__tick" d="M3.5 8.5l3 3 6-7" pathLength="1"/><path class="kodza-checkbox__dash" d="M4 8h8" pathLength="1"/></svg></span>
    <span class="kodza-checkbox__text">Vanilla JS<small>No flavour added.</small></span>
  </label>
</fieldset>

/* Kodza License: free to use, client work included. Not to resell or redistribute, ported or not: https://kodza.dev/docs/#print-license */
/* Kodza — Checkbox
   Real checkboxes, redrawn: on check, ink grows from the centre of the box and the tick draws
   itself; on uncheck, the tick rubs out first. A "select all" box (data-all) shows a dash when
   only some are checked. With --cards, each option is a card that firms up when checked.
   Everything is tuned with the --kz-check-* variables. */
.kodza-checkbox {
  --kz-check-bg: #ffffff;
  --kz-check-fg: #0a0a0a;
  --kz-check-muted: rgba(10, 10, 10, 0.6);
  --kz-check-line: rgba(10, 10, 10, 0.2);
  --kz-check-soft: rgba(10, 10, 10, 0.06);
  --kz-check-ink: #0a0a0a;
  --kz-check-on-ink: #ffffff;
  --kz-check-size: 20px;
  --kz-check-ease: cubic-bezier(0.22, 1, 0.36, 1);
  --kz-check-spring: cubic-bezier(0.34, 1.56, 0.64, 1);

  display: grid;
  gap: 4px;
  margin: 0;
  padding: 0;
  border: 0;
  color: var(--kz-check-fg);
}

.kodza-checkbox__legend {
  margin-bottom: 10px;
  padding: 0;
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
  font-size: 12px;
  color: var(--kz-check-muted);
}

.kodza-checkbox__item {
  position: relative;
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 8px 10px;
  margin: 0 -10px;
  border-radius: 10px;
  cursor: pointer;
  transition: background-color 0.2s ease;
}

.kodza-checkbox__item:hover {
  background: var(--kz-check-soft);
}

/* The real checkbox stays, invisible, on top of the drawn one */
.kodza-checkbox__input {
  position: absolute;
  top: 8px;
  left: 10px;
  width: var(--kz-check-size);
  height: var(--kz-check-size);
  margin: 0;
  opacity: 0;
  cursor: inherit;
}

.kodza-checkbox__box {
  position: relative;
  display: grid;
  flex: none;
  place-items: center;
  width: var(--kz-check-size);
  height: var(--kz-check-size);
  border-radius: 6px;
  background: var(--kz-check-bg);
  box-shadow: inset 0 0 0 1.5px var(--kz-check-line);
  transition: box-shadow 0.2s ease, transform 0.25s var(--kz-check-ease);
}

.kodza-checkbox__item:hover .kodza-checkbox__box {
  box-shadow: inset 0 0 0 1.5px var(--kz-check-muted);
}

.kodza-checkbox__item:active .kodza-checkbox__box {
  transform: scale(0.88);
}

/* The ink: grows from the centre */
.kodza-checkbox__box::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: var(--kz-check-ink);
  transform: scale(0);
  transition: transform 0.2s ease-in 0.08s;
}

.kodza-checkbox__box svg {
  position: relative;
  width: 14px;
  height: 14px;
  fill: none;
  stroke: var(--kz-check-on-ink);
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.kodza-checkbox__tick,
.kodza-checkbox__dash {
  stroke-dasharray: 1;
  stroke-dashoffset: 1;
  transition: stroke-dashoffset 0.12s ease-in;
}

.kodza-checkbox__input:checked + .kodza-checkbox__box,
.kodza-checkbox__input:indeterminate + .kodza-checkbox__box {
  box-shadow: none;
}

.kodza-checkbox__input:checked + .kodza-checkbox__box::before,
.kodza-checkbox__input:indeterminate + .kodza-checkbox__box::before {
  transform: none;
  transition: transform 0.35s var(--kz-check-spring);
}

.kodza-checkbox__input:checked:not(:indeterminate) + .kodza-checkbox__box .kodza-checkbox__tick,
.kodza-checkbox__input:indeterminate + .kodza-checkbox__box .kodza-checkbox__dash {
  stroke-dashoffset: 0;
  transition: stroke-dashoffset 0.35s var(--kz-check-ease) 0.12s;
}

.kodza-checkbox__input:focus-visible + .kodza-checkbox__box {
  outline: 2px solid var(--kz-check-fg);
  outline-offset: 2px;
}

.kodza-checkbox__text {
  display: grid;
  gap: 2px;
  padding-top: 1px;
  font-size: 15px;
  font-weight: 500;
  line-height: 1.25;
}

.kodza-checkbox__text small {
  font-size: 13px;
  font-weight: 400;
  line-height: 1.45;
  color: var(--kz-check-muted);
}

.kodza-checkbox__item--all {
  margin-bottom: 4px;
  padding-bottom: 12px;
  border-radius: 10px 10px 0 0;
  box-shadow: inset 0 -1px 0 var(--kz-check-soft);
}

/* Disabled */
.kodza-checkbox__item:has(.kodza-checkbox__input:disabled) {
  cursor: not-allowed;
  opacity: 0.45;
}

.kodza-checkbox__item:has(.kodza-checkbox__input:disabled):hover {
  background: none;
}

/* --cards: each option is a card */
.kodza-checkbox--cards {
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 10px;
}

.kodza-checkbox--cards .kodza-checkbox__legend {
  float: left;
  width: 100%;
}

.kodza-checkbox--cards .kodza-checkbox__item {
  flex-direction: column;
  gap: 14px;
  margin: 0;
  padding: 16px;
  border-radius: 14px;
  background: var(--kz-check-bg);
  box-shadow: inset 0 0 0 1px var(--kz-check-line);
  transition: box-shadow 0.25s ease, transform 0.25s var(--kz-check-ease);
}

.kodza-checkbox--cards .kodza-checkbox__item:hover {
  box-shadow: inset 0 0 0 1px var(--kz-check-muted);
}

.kodza-checkbox--cards .kodza-checkbox__item:has(.kodza-checkbox__input:checked) {
  box-shadow: inset 0 0 0 1.5px var(--kz-check-ink);
}

.kodza-checkbox--cards .kodza-checkbox__item:active {
  transform: scale(0.98);
}

.kodza-checkbox--cards .kodza-checkbox__input {
  top: 16px;
  left: 16px;
}

@media (prefers-reduced-motion: reduce) {
  .kodza-checkbox__item,
  .kodza-checkbox__box,
  .kodza-checkbox__box::before,
  .kodza-checkbox__tick,
  .kodza-checkbox__dash {
    transition-duration: 0.01ms !important;
    transition-delay: 0s !important;
  }
}

/* Theming example — on a dark background:
.dark-section .kodza-checkbox {
  --kz-check-bg: #161616;
  --kz-check-fg: #f2f2f0;
  --kz-check-muted: rgba(242, 242, 240, 0.62);
  --kz-check-line: rgba(255, 255, 255, 0.24);
  --kz-check-soft: rgba(255, 255, 255, 0.07);
  --kz-check-ink: #f2f2f0;
  --kz-check-on-ink: #0a0a0a;
}
*/

/* kodza-guard 6454995a21f0 — generated by Kodza, do not edit.
   Theme guard: keeps a site's own CSS (WordPress themes, Bootstrap, CSS resets…) off this
   component. :not(#_) is always true and weighs as much as an id, so these lines win over
   theme rules made of classes and tags. Customise the component through its --kz-* variables. */

/* What the browser gives, where the component sets it only in some states: at the lowest weight, so its own rules below put it back */

:where(.kodza-checkbox__legend):not(#_) {
  float: revert;
}

:where(.kodza-checkbox__item):not(#_) {
  background-color: revert;
  background-image: revert;
  box-shadow: revert;
}

/* What the browser gives, on everything the component leaves to it */

.kodza-checkbox:not(#_) {
  border-radius: revert;
  outline: revert;
  text-decoration: revert;
  transition: revert;
  list-style: revert;
  box-sizing: revert;
  position: revert;
  background-color: revert;
  background-image: revert;
  box-shadow: revert;
  outline-offset: revert;
  appearance: revert;
  max-height: revert;
  font-family: revert;
  font-size: revert;
  font-weight: revert;
  font-style: revert;
  line-height: revert;
  letter-spacing: revert;
  text-transform: revert;
  text-underline-offset: revert;
  text-align: revert;
  text-indent: revert;
  text-shadow: revert;
  vertical-align: revert;
}

.kodza-checkbox__legend:not(#_) {
  border: revert;
  border-radius: revert;
  outline: revert;
  text-decoration: revert;
  transition: revert;
  list-style: revert;
  box-sizing: revert;
  position: revert;
  margin-top: revert;
  margin-right: revert;
  margin-left: revert;
  background-color: revert;
  background-image: revert;
  box-shadow: revert;
  outline-offset: revert;
  appearance: revert;
  max-width: revert;
  max-height: revert;
  font-weight: revert;
  font-style: revert;
  line-height: revert;
  letter-spacing: revert;
  text-transform: revert;
  text-underline-offset: revert;
  text-align: revert;
  text-indent: revert;
  text-shadow: revert;
  vertical-align: revert;
  white-space: revert;
}

.kodza-checkbox__item:not(#_) {
  border: revert;
  outline: revert;
  text-decoration: revert;
  list-style: revert;
  box-sizing: revert;
  float: revert;
  outline-offset: revert;
  appearance: revert;
  max-width: revert;
  max-height: revert;
  color: revert;
  font-family: revert;
  font-size: revert;
  font-weight: revert;
  font-style: revert;
  line-height: revert;
  letter-spacing: revert;
  text-transform: revert;
  text-underline-offset: revert;
  text-align: revert;
  text-indent: revert;
  text-shadow: revert;
  vertical-align: revert;
}

.kodza-checkbox__input:not(#_) {
  border: revert;
  padding: revert;
  border-radius: revert;
  outline: revert;
  text-decoration: revert;
  transition: revert;
  list-style: revert;
  box-sizing: revert;
  float: revert;
  background-color: revert;
  background-image: revert;
  box-shadow: revert;
  outline-offset: revert;
  appearance: revert;
  max-width: revert;
  max-height: revert;
  color: revert;
  font-family: revert;
  font-size: revert;
  font-weight: revert;
  font-style: revert;
  line-height: revert;
  letter-spacing: revert;
  text-transform: revert;
  text-underline-offset: revert;
  text-align: revert;
  text-indent: revert;
  text-shadow: revert;
  vertical-align: revert;
  white-space: revert;
  min-height: revert;
}

.kodza-checkbox__box:not(#_),
.kodza-checkbox__tick:not(#_),
.kodza-checkbox__dash:not(#_),
.kodza-checkbox__text:not(#_) {
  box-sizing: revert;
}

.kodza-checkbox__box svg:where(:not([class*="kodza-"])):not(#_) {
  border: revert;
  margin: revert;
  padding: revert;
  border-radius: revert;
  outline: revert;
  text-decoration: revert;
  transition: revert;
  list-style: revert;
  box-sizing: revert;
  float: revert;
  background-color: revert;
  background-image: revert;
  box-shadow: revert;
  outline-offset: revert;
  appearance: revert;
  max-width: revert;
  max-height: revert;
  color: revert;
  font-family: revert;
  font-size: revert;
  font-weight: revert;
  font-style: revert;
  line-height: revert;
  letter-spacing: revert;
  text-transform: revert;
  text-underline-offset: revert;
  text-align: revert;
  text-indent: revert;
  text-shadow: revert;
  vertical-align: revert;
}

.kodza-checkbox__text small:where(:not([class*="kodza-"])):not(#_) {
  border: revert;
  margin: revert;
  padding: revert;
  border-radius: revert;
  outline: revert;
  text-decoration: revert;
  transition: revert;
  list-style: revert;
  box-sizing: revert;
  float: revert;
  position: revert;
  background-color: revert;
  background-image: revert;
  box-shadow: revert;
  outline-offset: revert;
  appearance: revert;
  max-width: revert;
  max-height: revert;
  font-family: revert;
  font-style: revert;
  letter-spacing: revert;
  text-transform: revert;
  text-underline-offset: revert;
  text-align: revert;
  text-indent: revert;
  text-shadow: revert;
  vertical-align: revert;
}

.kodza-checkbox__legend:not(#_):where(:not([hidden])),
.kodza-checkbox__input:not(#_):where(:not([hidden])),
.kodza-checkbox__box svg:where(:not([class*="kodza-"])):not(#_):where(:not([hidden])),
.kodza-checkbox__text small:where(:not([class*="kodza-"])):not(#_):where(:not([hidden])) {
  display: revert;
}

.kodza-checkbox__legend:not(#_):where([hidden]),
.kodza-checkbox__input:not(#_):where([hidden]),
.kodza-checkbox__box svg:where(:not([class*="kodza-"])):not(#_):where([hidden]),
.kodza-checkbox__text small:where(:not([class*="kodza-"])):not(#_):where([hidden]) {
  display: none;
}

.kodza-checkbox__box:not(#_)::before {
  box-sizing: revert;
}

/* The component's own rules, one step stronger: real buttons and fields, what it sets on tags themes style (links, lists, headings, images…), and the root width (a theme may narrow it, never widen it) */

.kodza-checkbox:not(#_) {
  display: grid;
  padding: 0;
  border: 0;
  color: var(--kz-check-fg);
}

.kodza-checkbox__legend:not(#_) {
  margin-bottom: 10px;
  padding: 0;
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
  font-size: 12px;
  color: var(--kz-check-muted);
}

.kodza-checkbox__item:not(#_) {
  position: relative;
  display: flex;
  padding: 8px 10px;
  margin: 0 -10px;
  border-radius: 10px;
  transition: background-color 0.2s ease;
}

.kodza-checkbox__item:hover:not(#_) {
  background: var(--kz-check-soft);
}

.kodza-checkbox__input:not(#_) {
  position: absolute;
  top: 8px;
  left: 10px;
  width: var(--kz-check-size);
  height: var(--kz-check-size);
  margin: 0;
  opacity: 0;
  cursor: inherit;
}

.kodza-checkbox__box svg:not(#_) {
  position: relative;
}

.kodza-checkbox__text small:not(#_) {
  font-size: 13px;
  font-weight: 400;
  line-height: 1.45;
  color: var(--kz-check-muted);
}

.kodza-checkbox__item--all:not(#_) {
  margin-bottom: 4px;
  padding-bottom: 12px;
  border-radius: 10px 10px 0 0;
  box-shadow: inset 0 -1px 0 var(--kz-check-soft);
}

.kodza-checkbox__item:has(.kodza-checkbox__input:disabled):hover:not(#_) {
  background: none;
}

.kodza-checkbox--cards .kodza-checkbox__legend:not(#_) {
  float: left;
}

.kodza-checkbox--cards .kodza-checkbox__item:not(#_) {
  margin: 0;
  padding: 16px;
  border-radius: 14px;
  background: var(--kz-check-bg);
  box-shadow: inset 0 0 0 1px var(--kz-check-line);
  transition: box-shadow 0.25s ease, transform 0.25s var(--kz-check-ease);
}

.kodza-checkbox--cards .kodza-checkbox__item:hover:not(#_) {
  box-shadow: inset 0 0 0 1px var(--kz-check-muted);
}

.kodza-checkbox--cards .kodza-checkbox__item:has(.kodza-checkbox__input:checked):not(#_) {
  box-shadow: inset 0 0 0 1.5px var(--kz-check-ink);
}

.kodza-checkbox--cards .kodza-checkbox__input:not(#_) {
  top: 16px;
  left: 16px;
}

@media (prefers-reduced-motion: reduce) {
  .kodza-checkbox__item:not(#_) {
    transition-duration: 0.01ms !important;
    transition-delay: 0s !important;
  }
}

// Kodza License: free to use, client work included. Not to resell or redistribute, ported or not: https://kodza.dev/docs/#print-license
// Kodza — Checkbox
// Keeps a "select all" box (data-all) in step with the others in its group: checked when all
// are, a dash when only some are, and a click on it checks or clears them all (skipping the
// disabled ones). The drawing is CSS.
(() => {
  const SELECTOR = '.kodza-checkbox';
  // One instance. Everything it starts is tied to `signal`, so kodza:destroy stops it all
  function mount(root, signal) {
    const all = root.querySelector('.kodza-checkbox__input[data-all]');
    root.classList.add('is-ready');
    if (!all) return;
    const boxes = [...root.querySelectorAll('.kodza-checkbox__input:not([data-all])')].filter((box) => !box.disabled);

    let settling = 0;
    const sync = () => {
      clearTimeout(settling);
      // Wait for a cascade from the "all" box to finish before judging
      settling = setTimeout(judge, 80);
    };
    const judge = () => {
      const on = boxes.filter((box) => box.checked).length;
      all.checked = on === boxes.length;
      all.indeterminate = on > 0 && on < boxes.length;
    };

    all.addEventListener('change', () => {
      // One after the other, for the eye; the target is read once, before the boxes move
      const value = all.checked;
      boxes.forEach((box, i) => setTimeout(() => {
        if (box.checked === value) return;
        box.checked = value;
        box.dispatchEvent(new Event('change', { bubbles: true }));
      }, i * 60));
      // Meanwhile the "all" box already shows where it is going
      all.indeterminate = false;
      all.checked = value;
    }, { signal });
    boxes.forEach((box) => box.addEventListener('change', sync, { signal }));
    judge();
  }

  // Kodza lifecycle, the same in every component: `kodza:init` starts the instances inside
  // event.detail.root (the whole page by default), `kodza:destroy` stops them and puts their
  // markup back. For themes and apps that swap content without a page load.
  const instances = new WeakMap();
  const find = (scope = document) => [scope, ...scope.querySelectorAll(SELECTOR)].filter((el) => el.matches?.(SELECTOR));
  const init = (scope) => find(scope).forEach((root) => {
    if (root.classList.contains('is-ready')) return; // already running, maybe from another copy of this script
    const controller = new AbortController();
    instances.set(root, { controller, html: root.innerHTML, attrs: [...root.attributes].map((a) => [a.name, a.value]) });
    mount(root, controller.signal);
    root.classList.add('is-ready');
  });
  const destroy = (scope) => find(scope).forEach((root) => {
    const instance = instances.get(root);
    if (!instance) return;
    instances.delete(root);
    instance.controller.abort();
    [...root.attributes].forEach((a) => root.removeAttribute(a.name));
    instance.attrs.forEach(([name, value]) => root.setAttribute(name, value));
    root.innerHTML = instance.html;
  });
  document.addEventListener('kodza:init', (event) => init(event.detail?.root));
  document.addEventListener('kodza:destroy', (event) => destroy(event.detail?.root));
  init();
  // Loaded in <head>, the script runs before the markup exists: once more when it is parsed
  if (document.readyState === 'loading') document.addEventListener('DOMContentLoaded', () => init(), { once: true });
})();

'use client';
// Kodza — Checkbox, for React. From https://kodza.dev/components/checkbox-component/
// Kodza License: free to use, client work included. Not to resell or redistribute, ported or not: https://kodza.dev/docs/#print-license
// Next to this file: checkbox-component.css and checkbox-component.js, the component's CSS and JS from Kodza, as they are.
// Yours to edit: the markup is plain JSX below.
// The script changes this markup once React has rendered it (it adds layers, splits text, moves
// nodes), so React must not patch it afterwards. When a prop changes, the key gives React a fresh
// element: kodza:destroy stops the script on the old one, kodza:init starts it on the new one.
import { useRef, useEffect, type ComponentPropsWithoutRef, type ComponentRef, type CSSProperties } from 'react';
import './checkbox-component.css';

type Variant = "cards";

export type CheckboxProps = Omit<ComponentPropsWithoutRef<'fieldset'>, "children" | "variant" | "vars"> & {
  /** Modifier class(es): .kodza-checkbox--cards */
  variant?: Variant | Variant[];
  /** Settings, as CSS variables on the root */
  vars?: {
    /** default: #ffffff */
    "--kz-check-bg"?: string | number;
    /** default: #0a0a0a */
    "--kz-check-fg"?: string | number;
    /** default: rgba(10, 10, 10, 0.6) */
    "--kz-check-muted"?: string | number;
    /** default: rgba(10, 10, 10, 0.2) */
    "--kz-check-line"?: string | number;
    /** default: rgba(10, 10, 10, 0.06) */
    "--kz-check-soft"?: string | number;
    /** default: #0a0a0a */
    "--kz-check-ink"?: string | number;
    /** default: #ffffff */
    "--kz-check-on-ink"?: string | number;
    /** default: 20px */
    "--kz-check-size"?: string | number;
    /** default: cubic-bezier(0.22, 1, 0.36, 1) */
    "--kz-check-ease"?: string | number;
    /** default: cubic-bezier(0.34, 1.56, 0.64, 1) */
    "--kz-check-spring"?: string | number;
  };
  className?: string;
};

export function Checkbox({ variant, vars, className, style, ...rest }: CheckboxProps) {
  const ref = useRef<ComponentRef<'fieldset'>>(null);
  const classes = ["kodza-checkbox", ...([] as string[]).concat(variant ?? []).map((v) => `kodza-checkbox--${v}`), className].filter(Boolean).join(' ');
  // Everything the markup is made of: when it changes, React gets a fresh element (see the top)
  const key = JSON.stringify([classes, vars, style, rest]);

  // Starts the script on this element once React has rendered it, stops it when it goes
  useEffect(() => {
    const root = ref.current;
    let live = true;
    // @ts-ignore: a plain script, no types to find
    import('./checkbox-component.js').then(() => {
      if (live) document.dispatchEvent(new CustomEvent('kodza:init', { detail: { root } }));
    });
    return () => {
      live = false;
      document.dispatchEvent(new CustomEvent('kodza:destroy', { detail: { root } }));
    };
  }, [key]);

  return (
    <fieldset key={key} {...rest} className={classes} style={{ ...vars, ...style } as CSSProperties} ref={ref}>
      <legend className="kodza-checkbox__legend">Email me about</legend>
      {' '}
      <label className="kodza-checkbox__item kodza-checkbox__item--all">
        <input className="kodza-checkbox__input" type="checkbox" data-all="" />
        {' '}
        <span className="kodza-checkbox__box" aria-hidden="true">
          <svg viewBox="0 0 16 16">
            <path className="kodza-checkbox__tick" d="M3.5 8.5l3 3 6-7" pathLength="1" />
            <path className="kodza-checkbox__dash" d="M4 8h8" pathLength="1" />
          </svg>
        </span>
        {' '}
        <span className="kodza-checkbox__text">Everything</span>
      </label>
      {' '}
      <label className="kodza-checkbox__item">
        <input className="kodza-checkbox__input" type="checkbox" name="topics" defaultValue="components" defaultChecked />
        {' '}
        <span className="kodza-checkbox__box" aria-hidden="true">
          <svg viewBox="0 0 16 16">
            <path className="kodza-checkbox__tick" d="M3.5 8.5l3 3 6-7" pathLength="1" />
            <path className="kodza-checkbox__dash" d="M4 8h8" pathLength="1" />
          </svg>
        </span>
        {' '}
        <span className="kodza-checkbox__text">New components<small>Every Tuesday, give or take a deploy.</small></span>
      </label>
      {' '}
      <label className="kodza-checkbox__item">
        <input className="kodza-checkbox__input" type="checkbox" name="topics" defaultValue="changelog" />
        {' '}
        <span className="kodza-checkbox__box" aria-hidden="true">
          <svg viewBox="0 0 16 16">
            <path className="kodza-checkbox__tick" d="M3.5 8.5l3 3 6-7" pathLength="1" />
            <path className="kodza-checkbox__dash" d="M4 8h8" pathLength="1" />
          </svg>
        </span>
        {' '}
        <span className="kodza-checkbox__text">The changelog<small>What broke, what we fixed, who to blame.</small></span>
      </label>
      {' '}
      <label className="kodza-checkbox__item">
        <input className="kodza-checkbox__input" type="checkbox" name="topics" defaultValue="memes" disabled />
        {' '}
        <span className="kodza-checkbox__box" aria-hidden="true">
          <svg viewBox="0 0 16 16">
            <path className="kodza-checkbox__tick" d="M3.5 8.5l3 3 6-7" pathLength="1" />
            <path className="kodza-checkbox__dash" d="M4 8h8" pathLength="1" />
          </svg>
        </span>
        {' '}
        <span className="kodza-checkbox__text">Memes<small>Not available in your region. Or any region.</small></span>
      </label>
    </fieldset>
  );
}