React add event listener to ref
React add event listener to ref: In React, you can add an event listener to a ref by using the useEffect
hook. First, create a ref using the useRef
hook. Then, in the useEffect
hook, add the event listener to the ref using the addEventListener
method. Finally, return a function from the useEffect
hook to remove the event listener when the component unmounts.
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How do you add an event listener to a ref in React?
This is a block of code written in JSX, a syntax extension for JavaScript that allows for easy creation of React components.
The code defines a functional component called App
that renders a button with the text "Click me". The button element is assigned to the buttonRef
constant using the useRef
hook.
The useEffect
hook is used to add an event listener to the button when the component is mounted. The event listener function, handleClick
, simply displays an alert with the message "Button clicked". The useEffect
hook also returns a cleanup function that removes the event listener when the component is unmounted.
The empty array passed as the second argument to useEffect
ensures that the effect only runs once, when the component is first mounted.
Output of React Js add event listener to ref