Remove event by event handler function - Javascript jQuery Method and Property

Javascript examples for jQuery Method and Property:undelegate

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Description

Remove event by event handler function

Demo Code

ResultView the demo in separate window 

<!DOCTYPE html>
<html>
<head>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<script>
function changeSize() {/*  w w w  .j  av  a  2 s  .co m*/
    $(this).animate({fontSize: "+=3px"});
}

function changeSpacing() {
    $(this).animate({letterSpacing: "+=2px"});
}

$(document).ready(function(){
    $("body").delegate("p", "click", changeSize);
    $("body").delegate("p", "click", changeSpacing);
    $("button").click(function(){
        $("body").undelegate("p", "click", changeSize);
    });
});
</script>
</head>
<body>

<p>This is a paragraph.</p>
<p>This is another paragraph.</p>
<p>Click any p element to increase size and letterspacing.</p>

<button>Remove the event handler changeSize() for all p elements</button>

</body>
</html>

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