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HTML | DOM TouchEvent ctrlKey Property
  • Last Updated : 31 Jan, 2019
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The TouchEvent ctrlKey property is a read-only property and used for returning a Boolean value which indicates whether or not the “CTRL” key was pressed when a touch event was triggered. It mostly returns false because generally, touch devices do not have a ctrl key.

Syntax :

event.ctrlKey

Return Value: It returns true if the ctrl key is pressed, else it returns false.

Below program illustrates the TouchEvent ctrlKey property :
Example: Finding out whether the “CTRL” key was pressed on the touch screen or not.




<!DOCTYPE html>
<html>
<meta name="viewport" 
      content="width=device-width,
               initial-scale=1">
  
<head>
    <title>TouchEvent ctrlKey property in HTML
    </title>
    
    <style>
        h1 {
            color: green;
        }
          
        h2 {
            font-family: Impact;
        }
          
        body {
            text-align: center;
        }
    </style>
</head>
  
<body ontouchstart="isKeyPressed(event)">
  
    <h1>GeeksforGeeks</h1>
    <h2>TouchEvent ctrlKey property</h2>
    <br>
  
    <p>Touch somewhere in the document and wait 
      for an alert to tell if the CTRL key was 
      pressed or not.</p>
  
    <script>
        function count(event) {
            
            //  Check ctrl key has been pressed or not.
            if (event.ctrlKey) {
                alert("CTRL key has been pressed!");
            } else {
                alert("CTRL key has not been pressed!");
            }
        }
    </script>
  
</body>
  
</html>

Output:

  • Before clicking the button:
  • After clicking the button:

Supported Browsers:

  • Internet Explorer
  • Google Chrome
  • Firefox

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