In this article, we need to Detect Alt/Option + another key in textarea by using 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 an alert message.
HTML
<body> <h1 style="color:green"> GeeksForGeeks </h1> <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( "neveropen says Detection successfully "); } } </script> </body> |
Note: We can also use ASCII code for detecting the keys.
Output:
Supported Browsers are listed below:
- Google Chrome
- Internet Explorer
- Firefox
- Opera
- Safari
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