How do you update rendered elements?
You can update UI(represented by rendered element) by passing the newly created element to ReactDOM's render method.
For example, lets take a ticking clock example, where it updates the time by calling render method multiple times,
function tick() {const element = (<div><h1>Hello, world!</h1><h2>It is {new Date().toLocaleTimeString()}.</h2></div>);ReactDOM.render(element, document.getElementById('root'));}setInterval(tick, 1000);