ReactJS unmountComponentAtNode() Method

React.js library is all about splitting the app into several components. Each Component has its own lifecycle. React provides us with some in-built methods that we can override at particular stages in the life-cycle of the component.

In class-based components, the unmountComponentAtNode() method Remove a mounted React component from the DOM.

Creating React Application:

• Step 1: Create a React application using the following command.

  npx create-react-app foldername

• Step 2: After creating your project folder i.e. foldername, move to it using the following command.

  cd foldername

Project Structure: It will look like the following.

Example: Now write down the following code in the App.js file. Here, App is our default component where we have written our code.

Step to Run Application: Run the application using the following command from the root directory of the project:

npm start

Output: Now open your browser and go to http://localhost:3000/, you will see the following output:

Reference: https://18.react.dev/reference/react-dom/unmountComponentAtNode