HTML | isTrusted Event Property

Last Updated : 22 Jan, 2019

The isTrusted event property is used for checking whether an event is trusted or not.

Return Value: It returns True if an event is trusted else it returns false.

Syntax :

event.isTrusted

Below program illustrates the isTrusted event property :

Example: To find out if a specific event is trusted or not.

<!DOCTYPE html> 
<html> 
  
<head> 
    <title>isTrusted Event Property in HTML</title> 
    <style> 
        h1 { 
            color: green; 
        } 
          
        h2 { 
            font-family: Impact; 
        } 
          
        body { 
            text-align: center; 
        } 
    </style> 
</head> 
  
<body onclick="MyEvent(event)"> 
  
    <h1>GeeksforGeeks</h1> 
    <h2>isTrusted Event Property</h2> 
  
    <p>Double Click the "Check Event" 
       button to check whether the event  
       is trusted or not.</p> 
  
    <button ondblclick="MyEvent(event)"> 
      Try it 
    </button> 
  
    <script> 
        // Check whether the event is trusted or not. 
        function MyEvent(event) { 
            if ("isTrusted" in event) { 
                if (event.isTrusted) { 
                    alert("The " + event.type +  
                    " is a trusted event."); 
                } else { 
                    alert("The " + event.type +  
                    " is not a trusted event."); 
                } 
            } else { 
                alert("Your browser does not support " 
                       +"the isTrusted property"); 
            } 
        } 
    </script> 
  
</body> 
  
</html> 