How to access a DOM element in React? What is the equilvalent of document.getElementById() in React

Question

How do I select certain bars in react.js?

This is my code:

var Progressbar = React.createClass({
    getInitialState: function () {
        return {          


        

Answer 1

Since React uses JSX code to create an HTML we cannot refer dom using regulation methods like documment.querySelector or getElementById.

Instead we can use React ref system to access and manipulate Dom as shown in below example:

constructor(props){

    super(props);
    this.imageRef = React.createRef(); // create react ref
}

componentDidMount(){

    **console.log(this.imageRef)** // acessing the attributes of img tag when dom loads
}


render = (props) => {

const {urls,description} = this.props.image;
    return (

            

        );

}

}