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HTML | onkeyup Event Attribute

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  • Difficulty Level : Basic
  • Last Updated : 02 Aug, 2021

This onkeyup event attribute works when the user releases the key from the keyboard.
Supported Tags:  It supports all HTML elements Except- 

  • <base>
  •  <bdo>
  • <br>
  • <head>
  • <html>
  • <iframe>
  • <meta>
  • <param>
  • <script>
  • <style> 
  • <title>


<element onkeyup = "script">

Attribute Value: This attribute contains single value script which works when the keyboard key is released. 
Supported Tags: It is supported by all HTML elements except <base>, <bdo>, <br>, <head>, <html>, <iframe>, <meta>, <param>, <script>, <style>, and <title>.


<!DOCTYPE html>
        <title>onkeyup Event Attribute </title>
            h1 {
                text-align: center;
                color: green;
            h2 {
                text-align: center;
            input[type=text] {
                width: 100%;
                padding: 12px 20px;
                margin: 8px 0;
                box-sizing: border-box;
                font-size: 24px;
                color: white;
            p {
                font-size: 20px;
        <h2>onkeyup Event Attribute</h2>
<p>Release the key to set a green background color.</p>
        <input type="text" id="demo" onkeydown="keydownFunction()"
            function keydownFunction() {
                document.getElementById("demo").style.backgroundColor = "blue";
            function keyupFunction() {
                document.getElementById("demo").style.backgroundColor = "green";

Press the key: 


Release the key: 


Supported Browser: The browser supported by onkeyup event attribute are listed below: 

  • Chrome
  • Internet Explorer
  • Firefox
  • Safari
  • Opera


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