Counter

<div class="kodza-counter">
  <p class="kodza-counter__value">12,480</p>
  <p class="kodza-counter__label">components copied this month</p>
</div>

<div class="kodza-counter">
  <p class="kodza-counter__value">99.9%</p>
  <p class="kodza-counter__label">uptime, on a good day</p>
</div>

<div class="kodza-counter">
  <p class="kodza-counter__value">0</p>
  <p class="kodza-counter__label">dependencies. Still.</p>
</div>

/* Kodza License: free to use, client work included. Not to resell or redistribute, ported or not: https://kodza.dev/docs/#print-license */
/* Kodza — Counter
   A figure that rolls into place like an odometer when it comes into view: every digit spins
   from 0, the ones on the right spin more and land last; a zero takes one full turn for the
   fun of it. Write the final figure in the HTML (it stays readable without the script, and
   for search engines); separators, decimals and signs stay put.
   Everything is tuned with the --kz-counter-* variables. */
.kodza-counter {
  --kz-counter-fg: #0a0a0a;
  --kz-counter-muted: rgba(10, 10, 10, 0.62);
  --kz-counter-size: clamp(44px, 6vw, 72px);

  display: grid;
  gap: 8px;
  color: var(--kz-counter-fg);
}

.kodza-counter__value {
  display: flex;
  margin: 0;
  font-size: var(--kz-counter-size);
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  line-height: 1.1;
  letter-spacing: -0.045em;
}

/* Each digit spins in its own window */
.kodza-counter__digit {
  display: inline-block;
  height: 1.1em;
  overflow: hidden;
}

.kodza-counter__digit > span {
  display: block;
}

.kodza-counter__digit > span > span {
  display: block;
  height: 1.1em;
}

.kodza-counter__char {
  white-space: pre;
}

.kodza-counter__sr {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

.kodza-counter__label {
  margin: 0;
  color: var(--kz-counter-muted);
  font-size: 15px;
  line-height: 1.5;
}

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

/* kodza-guard 894660ff6016 — 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, on everything the component leaves to it */

.kodza-counter:not(#_),
.kodza-counter__digit:not(#_),
.kodza-counter__char:not(#_),
.kodza-counter__sr:not(#_),
.kodza-counter__digit span:where(:not([class*="kodza-"])):not(#_) {
  box-sizing: revert;
}

.kodza-counter__value: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;
  color: revert;
  font-family: revert;
  font-style: revert;
  text-transform: revert;
  text-underline-offset: revert;
  text-align: revert;
  text-indent: revert;
  text-shadow: revert;
  vertical-align: revert;
}

.kodza-counter__label: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-family: revert;
  font-weight: 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-counter__label:not(#_):where(:not([hidden])) {
  display: revert;
}

.kodza-counter__label: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-counter__value:not(#_) {
  display: flex;
  margin: 0;
  font-size: var(--kz-counter-size);
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: -0.045em;
}

.kodza-counter__label:not(#_) {
  margin: 0;
  color: var(--kz-counter-muted);
  font-size: 15px;
  line-height: 1.5;
}

// Kodza License: free to use, client work included. Not to resell or redistribute, ported or not: https://kodza.dev/docs/#print-license
// Kodza — Counter
// Turns the figure into windows of spinning digits (screen readers keep the plain text), then
// rolls them when the counter comes into view: more turns and a later landing for the digits
// on the right. "kodza:replay" on the element rolls it again.
(() => {
  const SELECTOR = '.kodza-counter';
  const reduceMotion = window.matchMedia('(prefers-reduced-motion: reduce)').matches;

  // One instance. Everything it starts is tied to `signal`, so kodza:destroy stops it all
  function mount(root, signal) {
    const value = root.querySelector('.kodza-counter__value');
    if (!value) return;
    const text = value.textContent.trim();
    const count = (text.match(/\d/g) || []).length;
    let rank = 0;
    const strips = [];

    value.setAttribute('aria-hidden', 'true');
    value.after(Object.assign(document.createElement('span'), { className: 'kodza-counter__sr', textContent: text }));
    value.replaceChildren(...[...text].map((char) => {
      if (!/\d/.test(char)) return Object.assign(document.createElement('span'), { className: 'kodza-counter__char', textContent: char });
      // The digits on the right spin more: one turn on the left, up to three on the right
      const turns = 1 + Math.round((rank / Math.max(1, count - 1)) * 2);
      const column = Object.assign(document.createElement('span'), { className: 'kodza-counter__digit' });
      const strip = document.createElement('span');
      for (let i = 0; i < (turns + 1) * 10; i++) strip.append(Object.assign(document.createElement('span'), { textContent: i % 10 }));
      column.append(strip);
      strips.push({ strip, stop: turns * 10 + Number(char), rank: rank++ });
      return column;
    }));

    const land = () => strips.forEach(({ strip, stop }) => (strip.style.transform = `translateY(${-stop * 1.1}em)`));
    const roll = () => {
      if (reduceMotion) return land();
      strips.forEach(({ strip, stop, rank: r }) => {
        strip.getAnimations().forEach((animation) => animation.cancel());
        strip.style.transform = '';
        strip.animate([{ transform: 'translateY(0)' }, { transform: `translateY(${-stop * 1.1}em)` }], {
          duration: 1500 + r * 160,
          easing: 'cubic-bezier(0.16, 1, 0.3, 1)',
          fill: 'forwards',
        });
      });
    };

    if (reduceMotion || !('IntersectionObserver' in window)) land();
    else {
      const io = new IntersectionObserver((entries) => {
        if (!entries.some((entry) => entry.isIntersecting)) return;
        io.disconnect();
        roll();
      }, { threshold: 0.6 });
      io.observe(root);
      signal.addEventListener('abort', () => io.disconnect());
    }
    root.addEventListener('kodza:replay', roll, { 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 — Counter, for React. From https://kodza.dev/components/counter-animation/
// 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: counter-animation.css and counter-animation.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 './counter-animation.css';

export type CounterProps = Omit<ComponentPropsWithoutRef<'div'>, "children" | "vars"> & {
  /** Settings, as CSS variables on the root */
  vars?: {
    /** default: #0a0a0a */
    "--kz-counter-fg"?: string | number;
    /** default: rgba(10, 10, 10, 0.62) */
    "--kz-counter-muted"?: string | number;
    /** default: clamp(44px, 6vw, 72px) */
    "--kz-counter-size"?: string | number;
  };
  className?: string;
};

export function Counter({ vars, className, style, ...rest }: CounterProps) {
  const ref = useRef<ComponentRef<'div'>>(null);
  const classes = ["kodza-counter", 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('./counter-animation.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 (
    <div key={key} {...rest} className={classes} style={{ ...vars, ...style } as CSSProperties} ref={ref}>
      <p className="kodza-counter__value">12,480</p>
      <p className="kodza-counter__label">components copied this month</p>
    </div>
  );
}