ttmt ttmt - 7 months ago 9
Javascript Question

Dynamically created select menu on change not working

I have a jsfiddle here - http://jsfiddle.net/FTHVJ/

And demo here - http://ttmt.org.uk/select

I know this looks a little crazy but it's cloest I could get to the actual code.

I have an on 'change' event handler on a select menu #menu_One

This then adds a new select menu #menu_Two that is saved in jquery as a variable.

I'm then trying to add an on 'change' event handler to this added select menu.

The on 'change' event doesn't work on thw added select menu.

<!DOCTYPE html>
<html lang="en">
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1" />

<!--jQuery-->
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.9.0/jquery.min.js"></script>


<!--css-->

<style type="text/css">
*{
margin:0;
padding:0;
}
body{
background:#eee;
}
#wrap{
max-width:800px;
margin:0 auto;
background:#fff;
height:1000px;
padding:50px;
}
#new_select{
height:50px;
margin:20px 0 0 0;
padding:10px 0 0 0;
background:red;
}
</style>

<title>Title of the document</title>
</head>

<body>

<div id="wrap">

<select id="menu_One">
<option>Menu One 1</option>
<option>Menu One 2</option>
<option>Menu One 3</option>
<option>Menu One 4</option>
<option>Menu One 5</option>
</select>

<div id="new_select">
</div>
</div>

</body>


<script>

$(function(){

var select_two = "<select id='menu_Two'>";
select_two += "<option>Menu Two 1</option>";
select_two += "<option>Menu Two 2</option>";
select_two += "<option>Menu Two 3</option>";
select_two += "<option>Menu Two 4</option>";
select_two += "</select>";


$('#menu_One').on('change', function(){
$('#new_select').append(select_two);
});


$('#menu_Two').on('change', function(){
alert('here');
})

});

</script>



</html>

Answer

For dynamically created elements, you need to use the .on function:

$('#new_select').on('change', '#menu_Two', function(){
    alert('here');
});

Event listeners can only be attached to elements that are in the DOM, not elements that don't exist at the time.

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