jquery / jquery ui : $ is undefined

Question

I have a file that i think is jQuery UI. It mentions jQuery in the code but it is condensed, so it's hard to tell.

I included both jquery1.6.2.js and custom.js. (confirmed that they are both loading properly)

There is a sliding image panel that works fine when both are included, although I do get the message: $ is undefined from my own code (not the custom.js)

I read somewhere that the problem might be that I need to not include jQuery, but that seems to disable the image slider. The $ function seems to work fine if I remove the custom.js, but then of course the slide doesn't work.

Any ideas?

maybe this is an old build of jquery UI and i need to update it? but i can't see how to tell which features i should add — dan
– dan, Commented Jul 20, 2011 at 21:24
My ESP is on the fritz today, so I'm going to have to ask you to present a testcase. — Lightness Races in Orbit
– Lightness Races in Orbit, Commented Jul 20, 2011 at 21:25

RandomWebGuy · Accepted Answer · 2011-07-20 21:26:07Z

4

Make sure that your loading the jQuery library before you load any other JavaScript that relies on the jQuery library.

answered Jul 20, 2011 at 21:26

RandomWebGuy

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Naftali · Accepted Answer · 2011-07-20 21:25:44Z

3

Make sure to include jQuery then jQueryUI before any plugins.

answered Jul 20, 2011 at 21:25

Naftali

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user166390 · Accepted Answer · 2011-07-20 21:30:26Z

0

Load jQuery before things that depend upon it
Make sure jQuery is bound to window.$ (might not be with noConflict)

From the statement:

the $ function seems to work fine if i remove the custom.js

Then I believe that either custom.js is loaded before jQuery or the problem lies in custom.js: in particular, it is likely muddling with window.$ -- through jQuery.noConflict or otherwise. However, a test-case is required to say more with confidence.

Happy coding.

answered Jul 20, 2011 at 21:30

user166390

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