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HTML | onkeydown Event Attribute

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  • Difficulty Level : Basic
  • Last Updated : 16 Aug, 2022
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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>


<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>.


<!DOCTYPE html>
        <title> HTML | onkeydown 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 keyupFunction() {
              document.getElementById("demo").style.backgroundColor = "blue";
            function keydownFunction() {
              document.getElementById("demo").style.backgroundColor = "green";

Press the key: 


Release the key: 


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

  • Chrome 1
  • Edge 12
  • Internet Explorer 9
  • Firefox 6
  • Safari 1.2
  • Opera 12.1


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