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What is the sequence of jQuery events triggered?
The jQuery event handlers always execute in the order they were bound. With jQuery, you can also change the sequence. Let’s see how, for example, from
demo(1); demo(2);
We can change the sequence to −
demo(2); demo(1);
Example
You can try to run the following to learn and change the sequence of jQuery events −
<!DOCTYPE html>
<html>
<head>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<script>
$(document).ready(function(){
$.fn.bindFirst = function(name, fn) {
this.on(name, fn);
this.each(function() {
var handlers = $._data(this, 'events')[name.split('.')[0]];
var handler = handlers.pop();
handlers.splice(0, 0, handler);
});
};
$("div").click(function() { alert("1"); });
$("div").click(function() { alert("2"); });
$("div").click(function() { alert("3"); });
$("div").click(function() { alert("4"); });
$("div").bindFirst('click', function() { alert("5"); });
});
</script>
</head>
<style>
.demo {
cursor: pointer;
border: 3px solid #FF0000;
}
</style>
<body>
<h1>Heading 1</h1>
<div class="demo">
Click here for sequence.<br>
The sequence will be: 5, 1, 2, 3, 4
</div>
</body>
</html>
Updated on: 14-Feb-2020
597 Views
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