HTML | onkeydown Event Attribute

Difficulty Level : Basic
Last Updated : 03 Aug, 2021

This onkeydown event attribute works when user presses any key from the keyboard.
Supported Tags: It supports all HTML elements EXCEPT-

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

Syntax:

<element onkeydown = "script">

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

html

<!DOCTYPE html>
<html>
    <head>
        <title> HTML | onkeydown Event Attribute </title>
        <style>
            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;
            }
        </style>
    </head>
    <body>
        <h1>GeeksforGeeks<h1>
        <h2>onkeyup Event Attribute</h2>
         
<p>Release the key to set a green background color.</p>
 
        <input type="text" id="demo" onkeydown="keydownFunction()"
                onkeyup="keyupFunction()">
        <script>
            function keyupFunction() {
              document.getElementById("demo").style.backgroundColor = "blue";
            }
 
            function keydownFunction() {
              document.getElementById("demo").style.backgroundColor = "green";
            }
        </script>
    </body>
</html>