ReactJS TestRenderer.root Property

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

In this article, we will see how to use TestRenderer.root property. The TestRenderer.root property is used to return the root “test instance” object.

Creating React Application And Installing Module:

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

  
  
  

  npx create-react-app foldername

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

  cd foldername

• Step 3: After creating the ReactJS application, Install the required module using the following command:

  npm i react-test-renderer

Project Structure: It will look like the following.

Example 1:

App.js

import React from 'react';
import TestRenderer from 'react-test-renderer';

// Defining our App Component
const App = () => {

// Function to demonstrate TestRenderer.root property
function func(){
    const renderer = TestRenderer.create(
        <div>
            GeeksforGeeks
            <div>
                TestRenderer.root property
            </div>
        </div>
      );
      console.log(renderer.root);
}
func();

// Returning our JSX code
return <>

</>;
}

// Exporting your Default App Component
export default App

Output: 

Reference: https://reactjs.org/docs/test-renderer.html#testrendererroot