How to use PropTypes for type checking in React?

To use PropTypes for type checking in React, you need to import the PropTypes library from the 'prop-types' package.

Here is an example of how to use PropTypes for type checking in a functional component:

First, install the 'prop-types' package by running the following command:

npm install prop-types

Import PropTypes in your component file:

import React from 'react';
import PropTypes from 'prop-types';

Define the PropTypes for your component by creating a propTypes object:

function MyComponent(props) {
  // Component code here

}

MyComponent.propTypes = {
  name: PropTypes.string,
  age: PropTypes.number,
  isStudent: PropTypes.bool
};

Use the PropTypes in your component to validate the types of the props passed to it:

function MyComponent(props) {
  // Component code here
}

MyComponent.propTypes = {
  name: PropTypes.string.isRequired,
  age: PropTypes.number.isRequired,
  isStudent: PropTypes.bool.isRequired
};

If the prop passed to the component does not match the specified type, a warning will be displayed in the console.

By using PropTypes for type checking, you can ensure that the data passed to your components is of the correct type, which helps prevent bugs and errors in your application.