React Js Get Element by Ref
React Js Get Element by Ref:In Reactjs, you can access a DOM element using a ref. To do this, first, create a ref using the useRef hook or by creating a ref object. Then, attach the ref to the desired DOM element using the ref attribute in JSX. Once connected, you can access the DOM element and manipulate it directly in your React component's code. This is particularly useful for cases where you need to interact with the DOM imperatively, such as triggering animations, managing focus, or integrating with third-party libraries that require direct DOM access. However, it's essential to use refs sparingly, as React's declarative approach is usually more efficient and maintainable
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How can you get an element by its ref in a Reactjs?
In this React.js code snippet, we create a functional component App that utilizes the useRef hook to obtain a reference to a DOM element. We define a divRef which initially points to null.
Inside the component, a handleClick function is triggered when the div is clicked. It accesses the current background color of the referenced div using divRef.current.style.backgroundColor, then toggles it between 'white' and 'lightblue'. This allows us to change the div's background color on each click.
Finally, this component is rendered within a container div using ReactDOM. This technique demonstrates how to access and manipulate a DOM element in a React component using ref.
React Js Get Element by Ref Example
xxxxxxxxxx <script type="text/babel"> const { useRef } = React; const App = () => { const divRef = useRef(null); const handleClick = () => { // Get the current background color directly from the DOM element const currentColor = divRef.current.style.backgroundColor; const newColor = currentColor === 'white' ? 'lightblue' : 'white'; divRef.current.style.backgroundColor = newColor; }; return ( <div className='container'> <h3>React Js Get Element by Ref </h3> <div ref={divRef} onClick={handleClick} style={{ padding: '20px', cursor: 'pointer', backgroundColor: 'white' }} > Click me to change my background color </div> </div> ); } ReactDOM.render(<App />, document.getElementById('app')); </script>Output of React Js Get Element by Ref
