ReactJS findDOMNode() Method

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:

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.

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>GeeksforGeeks</h1> 

      <div id='node'>DOM Node</div> 

      <button onClick={find}>Click to find</button> 

    </div> 

  </>; 
} 

// Exporting your Default App Component 

export default App