React JS Knowledge Quiz

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To help React keep track of items in a list and improve performance.

<p>declarative</p> Signup and view all the answers

<p><code>componentDidMount</code> = Called when the component is mounted to the DOM <code>componentWillUnmount</code> = Called when the component is about to be unmounted from the DOM <code>render</code> = Called when the component is rendered to the DOM <code>shouldComponentUpdate</code> = Called when the component's props or state change</p> Signup and view all the answers

<p>A controlled component's value is managed by the state, whereas an uncontrolled component's value is managed by the DOM.</p> Signup and view all the answers

<p>React's Virtual DOM improves performance by only re-rendering the components that have changed, reducing the number of DOM mutations and resulting in faster rendering.</p> Signup and view all the answers

<p>The <code>shouldComponentUpdate</code> method determines whether a component should re-render when its props or state change.</p> Signup and view all the answers

<p>A functional component is a pure function that takes in props and returns JSX, whereas a class component is a class that extends the React Component class and has its own lifecycle methods.</p> Signup and view all the answers

<p>React's context API helps in sharing data between components by providing a way to share data between components without having to pass props down manually.</p> Signup and view all the answers