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πŸ‘©β€πŸ’» Technical question

Asked over 1 year ago in React by Esperanza 
useRef in react

πŸ€– SheCodes Athena says:

Answered in 3.18 seconds

useRef is a hook in React that allows you to create a mutable reference to an element, similar to the ref attribute in class components. It is commonly used to access or modify DOM elements or to store a value that persists across renders.

Here is an example of how to use useRef in React:

javascript
 
 
Copy code


import React, { useRef } from 'react';

function MyComponent() {
  const inputRef = useRef();

  const handleButtonClick = () => {
    inputRef.current.focus();
  };

  return (
    <div>
      <input ref={inputRef} type="text" />
      <button onClick={handleButtonClick}>Focus Input</button>
    </div>
  );
}

In this example, useRef is used to create a reference to the input element. We can then access and interact with the input element using the current property of the inputRef object. In the handleButtonClick function, we use inputRef.current.focus() to programmatically focus the input field when the button is clicked.

Note that useRef does not cause a re-render when the value of the reference changes, making it useful for storing mutable values that do not need to trigger a re-render. Also, unlike with useState, updating the value of a useRef reference will not cause a component to re-render.

useRef React Hooks DOM manipulation mutable reference component re-render
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