jQuery error on null selector

Question

How can I get jQuery to throw an error when one of my selectors selects nothing?

deceze · Accepted Answer · 2011-03-25 03:51:47Z

2

if(!$('selector').length)
    throw error

edited Mar 25, 2011 at 3:51

deceze♦

525k89 gold badges806 silver badges954 bronze badges

answered Mar 25, 2011 at 3:50

Pramendra Gupta

14.9k4 gold badges35 silver badges35 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

Dov Kaufmann Over a year ago

I already have a selector (many of them, actually) but some of them do not work. I want to know when they are not selecting anything. Thanks!

Dov Kaufmann · Accepted Answer · 2011-03-29 02:07:26Z

0

I've created an example with Wikipedia: http://jsfiddle.net/Lctjs/. I want the first line to throw an error because it selects nothing. The other two lines actually do something (there is actually an element with class id "content") but the first line doesn't select anything to operate and I'd like to know. Thanks!

answered Mar 29, 2011 at 2:07

Dov Kaufmann

1

Comments

Community · Accepted Answer · 2017-05-23 09:59:41Z

0

I added an example on how to debug this here: jquery hides simple javascript errors

And here is a fiddle: http://jsfiddle.net/B4XQx/

edited May 23, 2017 at 9:59

CommunityBot

11 silver badge

answered Oct 7, 2011 at 14:44

David Hellsing

109k44 gold badges181 silver badges214 bronze badges

Collectives™ on Stack Overflow

jQuery error on null selector

3 Answers 3

1 Comment

Comments

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

3 Answers 3

1 Comment

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related