Prevent Postback using JavaScript

Question

I have the following code. When the user hits [ENTER] (keycode = 13), the form is being resubmitted. I'd like to prevent a postback in this condition. When I set the keycode equal to 0, it does nothing. The page postback is still occuring. How can I prevent the post postback?

    jQuery(this.Elements.TxtClientId).keypress(function(e) {
        if (e.keyCode == 13) {
            e.keyCode = 0;
            alert("keycode: " + e.keyCode);
            thisTemp._internalClientId = jQuery(thisTemp.Elements.TxtClientId).val();
            jQuery(thisTemp.Elements.DDLClientName).val(jQuery(thisTemp.Elements.TxtClientId).val());
            thisTemp.UpdateTestDropdown();             
        }
    });

Community · Accepted Answer · 2017-05-23 11:55:52Z

4

Try

 if(e.keyCode === 13){
       e.preventDefault();
       // remainder of your code
   }

per the question: Prevent a button to submit on enter key

edited May 23, 2017 at 11:55

CommunityBot

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answered Jun 27, 2011 at 18:49

Sean O

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2 Comments

JustBeingHelpful Over a year ago

What is the difference between 2 vs. 3 "=" signs?

Sean O Over a year ago

Checks for equality with / without type coercion, respectively. See this question: stackoverflow.com/questions/523643/… (In your case, either should work)

Ethan Cabiac · Accepted Answer · 2011-06-27 18:48:38Z

1

You need to prevent the default handler of the event. You are using jQuery so you can use the built in preventDefault in jQuery

answered Jun 27, 2011 at 18:48

Ethan Cabiac

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Comments

Patricia · Accepted Answer · 2011-06-27 18:48:44Z

0

i think you want preventDefault()!

http://api.jquery.com/event.preventDefault/

try putting this instead of setting it to 0

e.preventDefault();

answered Jun 27, 2011 at 18:48

Patricia

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