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CODE EXAMPLE FOR JAVASCRIPT

Hello World in React

const root = ReactDOM.createRoot(
  document.getElementById('root')
);

function tick() {
  const element = (
    <div>
      <h1>Hello, world!</h1>
      <h2>It is {new Date().toLocaleTimeString()}.</h2>
    </div>
  );
  root.render(element);}

setInterval(tick, 1000);
Source by reactjs.org #
 
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Tagged: #Hello #World #React
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