HTML onkeyup Attribute: The HTML onkeyup attribute is defined as it fires when the user releases a key. This attribute contains a single value script which works when the keyboard key is released. And the order of events related to the onkeyup event:
- onkeydown
- onkeypress
- onkeyup
HTML onkeyup Attribute
This attribute can be applied to all the HTML elements.
Supported Tags: It is supported by all HTML elements except <base>, <bdo>, <br>, <head>, <html>, <iframe>, <meta>, <param>, <script>, <style>, and <title>.
Syntax: <element onkeyup = “script”>
Browser Support
This attribute is supported by the following browsers:
- Chrome
- Firefox
- Safari
- Opera
- Internet Explorer
Example: for the input element
<!DOCTYPE html>
<html>
<body>
<p>A function is triggered when the user releases a key and it transforms the character to upper case.</p>
Enter your name: <input type="text" id="fname" onkeyup="myFunction()">
<script>
function myFunction() {
var x = document.getElementById("fname");
x.value = x.value.toUpperCase();
}
</script>
</body>
</html>
Output:
