Detecting when the backspace key is pressed in React.js
In React.jsdetect when the user presses the backspace key:
-
Adds
onKeyDownprops to the input element. - Each time the user presses a key in the input field, check if the key pressed was the backspace key.
- Call a function or run some logic if yes.
import {useState} from 'react';
const App = () => {
const [message, setMessage] = useState('');
const handleKeyDown = event => {
console.log('User pressed: ', event.key);
// console.log(message);
if (event.key === 'Backspace') {
// 👇️ your logic here
console.log('Backspace key pressed ✅');
}
};
return (
<div>
<input
value={message}
onChange={event => setMessage(event.target.value)}
onKeyDown={handleKeyDown}
id="message"
name="message"
autoComplete="off"
/>
</div>
);
};
export default App;
When onKeyDownthe attribute is added to the input field, we only listen for keys pressed by the user while the input field has focus.
KeyboardEventThe key property of the object returns the value of the key pressed by the user.
The event is fired whenever the user presses a key on the keyboard
keydown.
Every time the event is triggered we check if the key pressed is the backspace key and run some logic if so.
We can see the keys the user might have pressed by visiting this MDN page .
Conditions if (event.key === 'Backspace') {}All operating systems are covered - Windows, Mac, Linux, Android, etc.
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