React

by asdf

HTML

<script src="https://cdnjs.cloudflare.com/ajax/libs/react/18.2.0/umd/react.production.min.js"></script>
<div id="app"></div>

CSS

body {
  background: #20262E;
  padding: 20px;
  font-family: Helvetica;
}

#app {
  background: #fff;
  border-radius: 4px;
  padding: 20px;
  transition: all 0.2s;
}

li {
  margin: 8px 0;
}

h2 {
  font-weight: bold;
  margin-bottom: 15px;
}

.done {
  color: rgba(0, 0, 0, 0.3);
  text-decoration: line-through;
}

input {
  margin-right: 5px;
}

React

function Button({ handleClick, count }) {
  return <button onClick={handleClick}>You pressed me {count} times</button>;
}

function Counter() {
  const [count, setCount] = useState(0);

  function handleClick() {
    setCount(count + 1);
    setTimeout(() => {
      console.log("Print after 5 sec", count);
    }, 5000);
  }

  return <Button onClick={handleClick} count={count} />;
}

const render = () => ReactDOM.render(
  <Counter/>,
  document.getElementById('app')
);

render();