jQuery event.isDefaultPrevented() Method

The jQuery isDefaultPrevented() Method is an inbuilt method that checks whether the preventDefault() method was called for the event. This method returns a boolean value. It returns True if preventDefault() is called on the event, False otherwise.

Syntax:

event.isDefaultPrevented()

Parameters: It accepts a single parameter event that comes from the event binding function.

Example 1: This example checks isPreventDefault() Method called on the event or not.

HTML

<!doctype html>
<html>
 
<head>
    <title>
        isPreventDefault() Method
    </title>
 
    <script src=
"https://code.jquery.com/jquery-3.3.1.min.js">
    </script>
</head>
 
<body>
    <a href="https://www.geeksforgeeks.org">
        Go to Homepage
    </a>
 
    <div id="initial"></div>
    <div id="prevented"></div>
    <div id="response"></div>
 
    <!-- Script to check preventDefault() Method called or not -->
    <script>
        $("a").click(function (event) {
 
            $("#initial").html("Before: isDefaultPrevented? <strong>"
                + event.isDefaultPrevented() + "</strong>");
 
            event.preventDefault();
 
            $("#prevented").html("preventDefault() is called now.");
 
            $("#response").html("So, you are not going anywhere."
                + " isDefaultPrevented? <strong>"
                + event.isDefaultPrevented() + "</strong>");
        });
    </script>
</body>
 
</html>

Output:

Note: The bold text (true/false) is the value of isDefaultPrevented() method.

Example 2: This example check isDefaultPrevented() method prevent default action or not.

HTML

<!doctype html>
<html>
 
<head>
    <title>
        isPreventDefault() Method
    </title>
 
    <script src="https://code.jquery.com/jquery-3.3.1.min.js">
    </script>
</head>
 
<body>
    <a href="https://www.geeksforgeeks.org">
        Go to Homepage
    </a>
 
    <div id="initial"></div>
    <div id="prevented"></div>
    <div id="response"></div>
 
    <!-- Script to check preventDefault() Method called or not -->
    <script>
        $("a").click(function (event) {
 
            $("#initial").html("Before: isDefaultPrevented? <strong>"
                + event.isDefaultPrevented() + "</strong>");
 
            event.preventDefault();
 
            $("#prevented").html("preventDefault() is called now.");
 
            $("#response").html("So, you are not going anywhere."
                + " isDefaultPrevented? <strong>"
                + event.isDefaultPrevented() + "</strong>");
        });
    </script>
</body>
 
</html>
<!doctype html>
<html>
 
<head>
    <title>
        isPreventDefault() Method
    </title>
    <script src=
"https://code.jquery.com/jquery-3.3.1.min.js">
    </script>
</head>
 
<body>
 
    <form action="action.php">
        Input:<br>
        <input type="text" name="input_1">
        <button type="submit">Submit</button>
    </form>
 
    <!-- Script to describe isDefaultPrevented() Method -->
    <script>
        $("button").click(function (event) {
            if (event.isDefaultPrevented())
                alert('Default action was prevented');
            else
                alert('Click Ok');
 
            event.preventDefault();
 
            if (event.isDefaultPrevented())
                alert('Default action was prevented');
            else
                alert('Click Ok');
        });
    </script>
</body>
 
</html>