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Add an event listener to the body element:

1. Access the body element on the document object.
2. Use the method on the body element in the useEffect hook addEventListener().
3. Removes the event listener when the component unmounts.

import {useEffect} from 'react';

export default function App() {
  useEffect(() => {
    function handleClick() {
      console.log('click event triggered');
    }

    // 👇️ optionally set body height to full screen
    document.body.style.minHeight = '100vh';

    document.body.addEventListener('click', handleClick);

    return () => {
      // 👇️ remove event listener when the component unmounts
      document.body.removeEventListener('click', handleClick);
    };
  }, []);

  return (
    <div>
      <h2>Hello jiyik.com</h2>
    </div>
  );
}

We can access the body element on the document object.

We pass an empty dependenciesarray to useEffectthe hook because we only want to add the event listener to the body element once - when the component mounts.

useEffect(() => {
  function handleClick() {
    console.log('click event triggered');
  }

  document.body.style.minHeight = '100vh';

  document.body.addEventListener('click', handleClick);

  return () => {
    document.body.removeEventListener('click', handleClick);
  };
}, []);

This example shows how to add a click event listener, but this approach works for any other event type.

addEventListenerThe first argument to the method is the type of event to listen for, and the second argument is a function to be called when an event of the specified type occurs.

In the example, we minHeightset the CSS property to 100vh to make the body element full height.

I usually do this in my index.css file.

body {
  min-height: 100vh;
}

Make sure you import the index.css file into your index.js file.

import './index.css'

The function we useEffectreturn from the hook is called when the component unmounts.

We use removeEventListenerthe method to remove the event listener we registered previously.

The cleanup step is important because we want to make sure that we don't have any memory leaks in our application.