How to detect Alt/Option + another key in textarea ?
In this article, we need to Detect Alt/Option + another key in textarea by using the HTML and JavaScript. It detects both the keys i.e. Alt + h. The onkeydown Event occurs when someone presses a key (on the keyboard).
Syntax:
<textarea onkeydown="newScript" >
Example: The below code illustrates to detect that when the user pressed the Alt + h keys on the textarea. It will produce the alert message.
HTML
<!DOCTYPE html> <html> <body> <h2>GeeksForGeeks</h2> <h2> How to detect Alt/Option + another key in textarea? </h2> <textarea onkeydown="myFunction(event);"> </textarea> <script> function myFunction(e) { // It check both altKey + 'A' or 'a' if (e.altKey && e.key === "h") { alert( "GeeksforGeeks says Detection successfully "); } } </script> </body> </html> |
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Note: We can also use ASCII code for detecting the keys.
Output:
- Before pressing on Alt + h Keys:
- After pressing on Alt + h Keys
Supported Browsers are listed below:
- Google Chrome
- Internet Explorer
- Firefox
- Opera
- Safari
