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 class-based components, the FindDOMNode() method is used to return DOM of the given element.
Creating React Application And Installing Module:
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Step 1: Create a React application using the following command.
npx create-react-app foldername
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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.
App.js
import React from 'react'; import ReactDOM from 'react-dom';   // Defining our App Component const App = () => {     // Function to get element from findDOMNode()   function find() {     var node = document.getElementById("node");     var a = ReactDOM.findDOMNode(node);     console.log(a);     a.style.color = 'green';     a.style.fontSize = "x-large";   }     // Returning our JSX code   return <>     <div>       <h1>neveropen</h1>       <div id='node'>DOM Node</div>       <button onClick={find}>Click to find</button>     </div>   </>; }   // Exporting your Default App Component export default App |
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://reactjs.org/docs/react-dom.html#finddomnode
