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.
For reprinting, please send an email to 1244347461@qq.com for approval. After obtaining the author's consent, kindly include the source as a link.
Related Articles
How to avoid cross-origin (CORS) issues in React/Next.js
Publish Date：2025/03/17 Views：166 Category：NETWORK
-
In this article, we will introduce how to avoid cross-origin (CORS) issues in React/Next.js. Cross-origin resource sharing (CORS) is a protocol that defines how web requests should be handled when crossing different URLs.
React Tutorial - Transferring Props
Publish Date：2025/03/16 Views：185 Category：React
-
React transfers Props. Props are generated when components are encapsulated. Components expose some properties (Props) to the outside world to complete some functions.
React Tutorial: Props Anti-Pattern
Publish Date：2025/03/16 Views：183 Category：React
-
React's Props anti-pattern, using Props to generate state in getInitialState is an anti-pattern - Anti-Pattern.
React Tutorial - Props Validation
Publish Date：2025/03/16 Views：99 Category：React
-
Props validation is a very useful way to use components correctly. It can avoid many bugs and problems as your application becomes more and more complex. In addition, it can make your program more readable.
React tutorial: Types of Props for child components
Publish Date：2025/03/16 Views：170 Category：React
-
Usually, the child components of a React component are a group, that is, the child components are an array. Introduction to Type of the Children Props.
How to solve the error Uncaught TypeError: Cannot read properties of undefined in
Publish Date：2025/03/16 Views：150 Category：React
-
In the process of React development, we often encounter some errors. Here we look at an error reported in App.js. The error is as follows: App.js:69 Uncaught TypeError: Cannot read properties of undefined (reading 'setState') at onInput
Why do you need to bind event handlers in React Class Components?
Publish Date：2025/03/16 Views：58 Category：React
-
When using React, we must have come across control components and event handlers. We need to use `.bind()` in the constructor of the custom component to bind these methods to the component instance. As shown in the following code:
Solution to the error ＂does not contain a default export＂ in React
Publish Date：2025/03/16 Views：187 Category：React
-
When we try to use `default import` to import from a module that does not have a `default export`, we get a "does not contain a default export" error. To fix the error, make sure the module has named exports and wrap the import in curly braces, e.g.
Error in React: Attempted import error 'X' is not exported from Solution
Publish Date：2025/03/16 Views：76 Category：React
-
In React, the error “Attempted import error 'X' is not exported from” in React.js occurs when we try to import a named import that does not exist in the specified file. To fix the error, make sure the module has named exports and you have not obfu
