How to Get a React Component’s Element

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JSX is an amazing pseudo-language for React, and if I'm honest, it's what brought me to love React so much.  Using React without JSX is cumbersome and frustrating, while using JSX is such an easier way to express your code.  One drawback of JSX, however, is that it makes accessing component elements indirect, if not difficult.

The truth is that accessing a component's own elements is actually much easier than most think.  Let's look at how a component method can access its own DOM node with JavaScript:

Method 1:  react-dom

react-dom provides a findDomNode method for finding the component's node:

// Get ReactDOM
import ReactDOM from "react-dom";

// In your component method
class MyComponent extends Component {

    myMethod() {
        const node = ReactDOM.findDOMNode(this);


With ReactDOM.findDOMNode(this), you can get the widget's main node, and from there you can use typical DOM methods:

const node = ReactDOM.findDOMNode(this);

// Get child nodes
if (node instanceof HTMLElement) {
    const child = node.querySelector('.someClass');

This mixes a bit of React and basic JavaScript DOM manipulation.

Method 2:  ref

Another method of getting DOM nodes is by using refs; an example usage is detailed in my React and autofocus post:

class MyComponent extends Component {

  // The element we want to retrieve
  _input: ?HTMLInputElement;

  // ....

  componentDidUpdate() {

  render() {
      return (
              ref={c => (this._input = c)}

Adding a ref attribute to the element you want a handle on is a more React-centric approach to getting a handle on an element.  Both strategies work well so choose whichever you prefer!

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    i have a parent component in which two other components are defined .What i want is to access on component element in the second component to change it behavior.Help could be appreciated….

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