Star Rating

<fieldset class="kodza-rating">
  <legend class="kodza-rating__legend">How was the copy-paste?</legend>
  <div class="kodza-rating__stars">
    <input class="kodza-rating__input" type="radio" name="rating" value="1" aria-label="1 star: Meh">
    <input class="kodza-rating__input" type="radio" name="rating" value="2" aria-label="2 stars: Fine">
    <input class="kodza-rating__input" type="radio" name="rating" value="3" aria-label="3 stars: Good">
    <input class="kodza-rating__input" type="radio" name="rating" value="4" aria-label="4 stars: Great">
    <input class="kodza-rating__input" type="radio" name="rating" value="5" aria-label="5 stars: Shipped it">
  </div>
  <p class="kodza-rating__word" aria-hidden="true"><span>Pick a star</span></p>
</fieldset>

<div class="kodza-rating kodza-rating--static" role="img" aria-label="Rated 4.6 out of 5 by 2,148 developers" style="--kz-score: 4.6">
  <span class="kodza-rating__score">4.6</span>
  <span class="kodza-rating__display" aria-hidden="true"></span>
  <span class="kodza-rating__count">2,148 devs, zero bug reports. Mostly.</span>
</div>

/* Kodza License: free to use, client work included. Not to resell or redistribute, ported or not: https://kodza.dev/docs/#print-license */
/* Kodza — Star Rating
   Real radio buttons drawn as stars. Hover lights the stars up to the pointer, one after the
   other, and the word rolls to match ("Meh" to "Shipped it"); picking makes them pop in a
   little wave. The static version (--static, with --kz-score) fills to the exact score, the
   fifth star cut where it should be, and counts up when it comes into view.
   Everything is tuned with the --kz-rating-* variables. */
.kodza-rating {
  --kz-rating-fg: #0a0a0a;
  --kz-rating-muted: rgba(10, 10, 10, 0.6);
  --kz-rating-rail: rgba(10, 10, 10, 0.14);
  --kz-rating-ink: #0a0a0a;
  --kz-rating-size: 30px;
  --kz-rating-gap: 6px;
  --kz-rating-ease: cubic-bezier(0.22, 1, 0.36, 1);
  --kz-rating-star: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M12 2.6l2.9 5.9 6.5.9-4.7 4.6 1.1 6.5L12 17.4l-5.8 3.1 1.1-6.5L2.6 9.4l6.5-.9z' stroke='black' stroke-width='1.2' stroke-linejoin='round'/%3E%3C/svg%3E");

  display: grid;
  justify-items: start;
  gap: 10px;
  margin: 0;
  padding: 0;
  border: 0;
  color: var(--kz-rating-fg);
}

.kodza-rating__legend {
  margin-bottom: 10px;
  padding: 0;
  font-size: 15px;
  font-weight: 500;
}

.kodza-rating__stars {
  display: flex;
  gap: var(--kz-rating-gap);
  border-radius: 8px;
}

.kodza-rating__stars:has(.kodza-rating__input:focus-visible) {
  outline: 2px solid var(--kz-rating-fg);
  outline-offset: 6px;
}

.kodza-rating__input {
  width: var(--kz-rating-size);
  height: var(--kz-rating-size);
  margin: 0;
  background: var(--kz-rating-rail);
  cursor: pointer;
  appearance: none;
  -webkit-mask: var(--kz-rating-star) center / contain no-repeat;
  mask: var(--kz-rating-star) center / contain no-repeat;
  transition: background-color 0.15s ease;
}

.kodza-rating__input:focus-visible {
  outline: none;
}

/* Lit: one after the other when lighting up, all together when going out */
.kodza-rating__input.is-lit {
  background: var(--kz-rating-ink);
  transition-delay: calc(var(--i, 0) * 40ms);
}

.kodza-rating__input.is-preview:not(.is-lit) {
  background: var(--kz-rating-muted);
  transition-delay: calc(var(--i, 0) * 40ms);
}

.kodza-rating__word {
  display: inline-grid;
  margin: 0;
  overflow: hidden;
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
  font-size: 12px;
  color: var(--kz-rating-muted);
}

.kodza-rating__word > span {
  grid-area: 1 / 1;
}

.kodza-rating__word .is-chosen {
  color: var(--kz-rating-fg);
}

/* --static: a score, filled to the exact value */
.kodza-rating--static {
  grid-template-columns: auto auto;
  align-items: center;
  column-gap: 14px;
  row-gap: 4px;
}

.kodza-rating__score {
  grid-row: span 2;
  font-size: 44px;
  font-weight: 600;
  line-height: 1;
  letter-spacing: -0.04em;
  font-variant-numeric: tabular-nums;
}

.kodza-rating__display {
  display: block;
  width: calc(var(--kz-rating-size) * 5 * 0.6 + var(--kz-rating-gap) * 4 * 0.6);
  height: calc(var(--kz-rating-size) * 0.6);
  background:
    linear-gradient(var(--kz-rating-ink), var(--kz-rating-ink)) 0 0 / calc(var(--kz-score, 0) / 5 * 100%) 100% no-repeat,
    var(--kz-rating-rail);
  -webkit-mask: var(--kz-rating-star) 0 0 / calc(var(--kz-rating-size) * 0.6 + var(--kz-rating-gap) * 0.6) 100% repeat-x;
  mask: var(--kz-rating-star) 0 0 / calc(var(--kz-rating-size) * 0.6 + var(--kz-rating-gap) * 0.6) 100% repeat-x;
}

/* With the script, it fills when it comes into view */
.kodza-rating--static.is-armed .kodza-rating__display {
  background-size: 0% 100%, auto;
  transition: background-size 1.1s var(--kz-rating-ease);
}

.kodza-rating--static.is-armed.is-in .kodza-rating__display {
  background-size: calc(var(--kz-score, 0) / 5 * 100%) 100%, auto;
}

.kodza-rating__count {
  font-size: 13px;
  color: var(--kz-rating-muted);
}

@media (prefers-reduced-motion: reduce) {
  .kodza-rating__input,
  .kodza-rating--static.is-armed .kodza-rating__display {
    transition-duration: 0.01ms !important;
    transition-delay: 0s !important;
  }
}

/* Theming example — on a dark background:
.dark-section .kodza-rating {
  --kz-rating-fg: #f2f2f0;
  --kz-rating-muted: rgba(242, 242, 240, 0.62);
  --kz-rating-rail: rgba(255, 255, 255, 0.16);
  --kz-rating-ink: #f2f2f0;
}
*/

/* kodza-guard 97c0f2a3f4d9 — 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-rating__input):not(#_) {
  outline: revert;
}

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

.kodza-rating: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-rating__legend:not(#_) {
  border: revert;
  border-radius: revert;
  outline: revert;
  text-decoration: revert;
  transition: revert;
  list-style: revert;
  box-sizing: revert;
  float: 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;
  color: revert;
  font-family: 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-rating__stars:not(#_),
.kodza-rating__score:not(#_),
.kodza-rating__display:not(#_),
.kodza-rating__count:not(#_),
.kodza-rating__word span:where(:not([class*="kodza-"])):not(#_) {
  box-sizing: revert;
}

.kodza-rating__input:not(#_) {
  border: revert;
  padding: revert;
  border-radius: revert;
  text-decoration: revert;
  list-style: revert;
  box-sizing: revert;
  float: revert;
  position: revert;
  box-shadow: revert;
  outline-offset: 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-rating__word:not(#_) {
  border: 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-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-rating__legend:not(#_):where(:not([hidden])),
.kodza-rating__input:not(#_):where(:not([hidden])) {
  display: revert;
}

.kodza-rating__legend:not(#_):where([hidden]),
.kodza-rating__input:not(#_):where([hidden]) {
  display: none;
}

/* 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-rating:where(fieldset):not(#_) {
  display: grid;
  padding: 0;
  border: 0;
  color: var(--kz-rating-fg);
}

.kodza-rating__legend:not(#_) {
  margin-bottom: 10px;
  padding: 0;
  font-size: 15px;
  font-weight: 500;
}

.kodza-rating__input:not(#_) {
  width: var(--kz-rating-size);
  height: var(--kz-rating-size);
  margin: 0;
  background: var(--kz-rating-rail);
  cursor: pointer;
  appearance: none;
  -webkit-mask: var(--kz-rating-star) center / contain no-repeat;
  mask: var(--kz-rating-star) center / contain no-repeat;
  transition: background-color 0.15s ease;
}

.kodza-rating__input:focus-visible:not(#_) {
  outline: none;
}

.kodza-rating__input.is-lit:not(#_) {
  background: var(--kz-rating-ink);
  transition-delay: calc(var(--i, 0) * 40ms);
}

.kodza-rating__input.is-preview:not(.is-lit):not(#_) {
  background: var(--kz-rating-muted);
  transition-delay: calc(var(--i, 0) * 40ms);
}

.kodza-rating__word:not(#_) {
  display: inline-grid;
  margin: 0;
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
  font-size: 12px;
  color: var(--kz-rating-muted);
}

@media (prefers-reduced-motion: reduce) {
  .kodza-rating__input: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 — Star Rating
// Lights the stars up to the one under the pointer (or the checked one), rolls the word, and
// makes the stars pop in a wave when you pick. The static version fills and counts up to its
// score the first time it comes into view.
(() => {
  const SELECTOR = '.kodza-rating';
  const reduceMotion = window.matchMedia('(prefers-reduced-motion: reduce)').matches;
  const ease = 'cubic-bezier(0.22, 1, 0.36, 1)';

  const roll = (box, text, chosen, dir = 1) => {
    const prev = box.lastElementChild;
    if (prev && prev.textContent === text && prev.classList.contains('is-chosen') === chosen) return;
    const span = Object.assign(document.createElement('span'), { textContent: text });
    span.classList.toggle('is-chosen', chosen);
    box.append(span);
    if (!prev) return;
    if (reduceMotion || prev.textContent === text) return prev.remove();
    const timing = { duration: 320, easing: ease };
    prev.animate([{ transform: 'none' }, { transform: `translateY(${dir * -110}%)` }], { ...timing, fill: 'forwards' }).finished.then(() => prev.remove());
    span.animate([{ transform: `translateY(${dir * 110}%)` }, { transform: 'none' }], timing);
  };

  // The interactive stars
  function mountStars(root, signal) {
    const stars = [...root.querySelectorAll('.kodza-rating__input')];
    const word = root.querySelector('.kodza-rating__word');
    if (!stars.length) return;
    const words = stars.map((star) => (star.getAttribute('aria-label') || '').split(':').pop().trim());
    const idle = word?.textContent.trim() || '';
    stars.forEach((star, i) => star.style.setProperty('--i', i));
    let shown = 0;

    const light = (count, preview) => {
      const chosen = stars.findIndex((star) => star.checked) + 1;
      stars.forEach((star, i) => {
        star.classList.toggle('is-lit', i < (preview ? Math.min(count, chosen) : count));
        star.classList.toggle('is-preview', preview && i < count);
      });
      if (word) roll(word, count ? words[count - 1] : idle, !preview && count > 0, count >= shown ? 1 : -1);
      shown = count;
    };
    const rest = () => light(stars.findIndex((star) => star.checked) + 1, false);

    stars.forEach((star, i) => {
      star.addEventListener('pointerenter', () => light(i + 1, true), { signal });
      star.addEventListener('change', () => {
        light(i + 1, false);
        if (reduceMotion) return;
        stars.slice(0, i + 1).forEach((s, k) => s.animate([{ transform: 'scale(1)' }, { transform: 'scale(1.28)' }, { transform: 'scale(1)' }], { duration: 380, delay: k * 45, easing: ease }));
      }, { signal });
    });
    root.querySelector('.kodza-rating__stars')?.addEventListener('pointerleave', rest, { signal });
    rest();
  }

  // The static score fills and counts up once, when it comes into view
  function mountScore(root, signal) {
    const score = parseFloat(getComputedStyle(root).getPropertyValue('--kz-score')) || 0;
    const number = root.querySelector('.kodza-rating__score');
    if (reduceMotion || !('IntersectionObserver' in window)) return;
    root.classList.add('is-armed');
    if (number) number.textContent = '0.0';
    const io = new IntersectionObserver(([entry]) => {
      if (!entry.isIntersecting) return;
      io.disconnect();
      root.classList.add('is-in');
      const start = performance.now();
      const step = (now) => {
        const t = Math.min(1, (now - start) / 1100);
        if (number) number.textContent = (score * (1 - Math.pow(1 - t, 3))).toFixed(1);
        if (t < 1 && !signal.aborted) requestAnimationFrame(step);
      };
      requestAnimationFrame(step);
    }, { threshold: 0.6 });
    io.observe(root);
    signal.addEventListener('abort', () => io.disconnect());
  }

  // One instance. Everything it starts is tied to `signal`, so kodza:destroy stops it all
  function mount(root, signal) {
    if (root.classList.contains('kodza-rating--static')) mountScore(root, signal);
    else mountStars(root, signal);
  }

  // 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 — Star Rating, for React. From https://kodza.dev/components/rating-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: rating-component.css and rating-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 './rating-component.css';

type Variant = "static";

export type StarRatingProps = Omit<ComponentPropsWithoutRef<'fieldset'>, "children" | "variant" | "vars"> & {
  /** Modifier class(es): .kodza-rating--static */
  variant?: Variant | Variant[];
  /** Settings, as CSS variables on the root */
  vars?: {
    /** default: #0a0a0a */
    "--kz-rating-fg"?: string | number;
    /** default: rgba(10, 10, 10, 0.6) */
    "--kz-rating-muted"?: string | number;
    /** default: rgba(10, 10, 10, 0.14) */
    "--kz-rating-rail"?: string | number;
    /** default: #0a0a0a */
    "--kz-rating-ink"?: string | number;
    /** default: 30px */
    "--kz-rating-size"?: string | number;
    /** default: 6px */
    "--kz-rating-gap"?: string | number;
    /** default: cubic-bezier(0.22, 1, 0.36, 1) */
    "--kz-rating-ease"?: string | number;
    /** default: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M12 2.6l2.9 5.9 6.5.9-4.7 4.6 1.1 6.5L12 17.4l-5.8 3.1 1.1-6.5L2.6 9.4l6.5-.9z' stroke='black' stroke-width='1.2' stroke-linejoin='round'/%3E%3C/svg%3E") */
    "--kz-rating-star"?: string | number;
  };
  className?: string;
};

export function StarRating({ variant, vars, className, style, ...rest }: StarRatingProps) {
  const ref = useRef<ComponentRef<'fieldset'>>(null);
  const classes = ["kodza-rating", ...([] as string[]).concat(variant ?? []).map((v) => `kodza-rating--${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('./rating-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-rating__legend">How was the copy-paste?</legend>
      <div className="kodza-rating__stars">
        <input className="kodza-rating__input" type="radio" name="rating" defaultValue="1" aria-label="1 star: Meh" />
        {' '}
        <input className="kodza-rating__input" type="radio" name="rating" defaultValue="2" aria-label="2 stars: Fine" />
        {' '}
        <input className="kodza-rating__input" type="radio" name="rating" defaultValue="3" aria-label="3 stars: Good" />
        {' '}
        <input className="kodza-rating__input" type="radio" name="rating" defaultValue="4" aria-label="4 stars: Great" />
        {' '}
        <input className="kodza-rating__input" type="radio" name="rating" defaultValue="5" aria-label="5 stars: Shipped it" />
      </div>
      <p className="kodza-rating__word" aria-hidden="true">
        <span>Pick a star</span>
      </p>
    </fieldset>
  );
}