HTML | DOM cancelable Event Property

Last Updated : 18 Jan, 2019

The cancelable Event property is used to indicate whether or not an event can have its default actions prevented. If the default actions can be prevented the value is true, else the value is false. It is a read-only property.
Syntax:

event.cancelable

Return Value: It returns a Boolean which indicates whether the event is cancelable or not.

It returns true indicating the event is cancelable.
It returns false indicating the event is not cancelable.

Example:

<!DOCTYPE html> 
<html> 
      
<head> 
    <title>DOM cancelable Event Property</title> 
</head> 
  
<body style="text-align:center"> 
  
    <h1 style="color: green;"> 
        GeeksforGeeks 
    </h1> 
      
    <h2> 
        DOM cancelable Event Property 
    </h2> 
  
    <button onclick="Geeks(event)">Click Here!</button> 
      
    <p id="p"></p> 
      
    <script> 
        function Geeks(event) {  
            var x = event.cancelable; 
            document.getElementById("p").innerHTML =  
                                    "Cancelable: " + x; 
        } 
    </script> 
</body> 
</html>                     

Output:
Before clicking on the button:

After clicking on the button:

Supported Browsers: The browser supported by cancelable Event property are listed below: