IE error .JavaScript runtime error: Object doesn't support property or method 'preventDefault'

Question

I have the following code inside my asp.net mvc web application:-

<script>
function validateForm(e) {
    if ($("[name=ip]").val() == "" && $("[name=mac]").val() == "") jAlert('Please enter atleast one search value.', 'Message');
    e.preventDefault();
}
 </script>

but when accessing this Script on IE i will get the following error:-

0x800a01b6 - JavaScript runtime error: Object doesn't support property or method 'preventDefault'

while when accessing the web page that uses this script using Firefox, chrome it will work fine, can anyone advice please ?

see [this other stackoverflow question](http://stackoverflow.com/questions/1000597/event-preventdefault-function-not-working-in-ie) — Josiah Ruddell, Oct 30 '13 at 15:39
Internet Explorer's event object doesn't have a `preventDefault()` function, you'll need to set its `returnValue` property to `false` instead. http://www.javascripter.net/faq/eventpreventdefault.htm — Anthony Grist, Oct 30 '13 at 15:40
@RocketHazmat Or that! I didn't notice the jQuery tag on the question. — Anthony Grist, Oct 30 '13 at 15:42
How are you binding this event? You should use jQuery to do that, that will fix this problem. — gen_Eric, Oct 30 '13 at 15:59

score 3 · Answer 1 · answered Oct 30 '13 at 15:41

3

//for IE
e.returnValue = false;

//for browsers supporting preventDefault()
if(e.preventDefault) e.preventDefault();

or short record:

(e.preventDefault) ? e.preventDefault() : e.returnValue = false;

answered Oct 30 '13 at 15:41

Vitalii Del Vorobioff

530
1
5
17

2

Right, but as the OP is using jQuery, this sort of thing shouldn't be necessary. – T.J. Crowder Oct 30 '13 at 15:44

score 1 · Answer 2 · answered Oct 30 '13 at 15:44

1

IE doesn't always like preventDefault

Check to make sure the broswer like preventDefault, if it doesnt, use returnValue.

if(e.preventDefault) {
   e.preventDefault();
} else {
   e.returnValue = false;
}

answered Oct 30 '13 at 15:44

mrwjr2003

13
3

but this will not work on any browser,, and the form will be submitted – john Gu Oct 30 '13 at 16:13

IE error .JavaScript runtime error: Object doesn't support property or method 'preventDefault'

2 Answers2