onchange event of text box not working if i change text value dynamically
Question
Onchange Event Fired when i change on textbox but when i am trying to change textbox value dynamically it doesnot fired why?
here is my simple demo when i click on button i changed textbox value dynamically but still textbox onchange event doesnot fired.
<!DOCTYPE html>
<html>
<head>
<title>Page Title</title>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script>
</head>
<body>
<h1>My First Heading</h1>
<p>My first paragraph.</p>
<input type="text" id="txtno" value="" onchange="javascript:alert('Hi');">
<input type="button" id="btnadd" value="ClickMe">
<script>
$(document).ready(function(){
$("#btnadd").click(function(){
$("#txtno").val('Hello');
});
});
</script>
</body>
</html>
2 answers
solution1
2 ACCPTED 2016-10-21 08:04:16
Changing value of input via JS will not trigger .onChange events. You must trigger it manually
$('#room_1').trigger('change');
I don't see where you change input field value in your code.
solution2
1 2016-10-21 12:23:01
The 'change' event is only fired on controls when the user commits a value change. If you make changes to a field programatically then you need to trigger the 'change' event.
In this case:
<script>
$(document).ready(function(){
$("#btnadd").click(function(){
$("#txtno").val('Hello').trigger('change');
});
});
</script>
The technical post webpages of this site follow the CC BY-SA 4.0 protocol. If you need to reprint, please indicate the site URL or the original address.Any question please contact:yoyou2525@163.com.