<div>What is<strong> [e.target.id]</strong> called in the following code snippet?</div> <div> <pre class=language-javascript><code>handleChange(e) { this.setState({[e.target.id]: e.target.value }) }</code></pre> </div>

ReactJS - Quiz(MCQ)

What is [e.target.id] called in the following code snippet?

handleChange(e) {
	this.setState({[e.target.id]: e.target.value })
}

a computer property name

a JSX code string

a dynamic key

a set value

Correct Answer : a dynamic key

Recent Updates in React.JS

Q .

What do you need to change about this code to get it to run?

class clock extends React.Component {
  render() {
    return <h1>Look at the time: {this.props.time}</h1>;
  }
}

Remove this

Capitalize clock

Remove the render method

Add quotes around the return value

Correct Answer : Capitalize clock

Q .

Which Hook could be used to update the document's title?

useEffect(function updateTitle() { document.title = name + ' ' + lastname; });

useEffect(() => { title = name + ' ' + lastname; });

useEffect(function updateTitle() { name + ' ' + lastname; });

useEffect(function updateTitle() { title = name + ' ' + lastname; });

Correct Answer :

useEffect(function updateTitle() { document.title = name + ' ' + lastname; });