Which Javascript library other than jQuery uses $?

Question

$ is not a function is a common error message newbies encounter when trying to use JQuery in Drupal 7.

The explanation is that the usage of $ is disabled in Drupal to avoid conflicts with other libraries. But which other library is using $?

dupe: [What JavaScript libraries are known to use the global dollar sign: window.$?](http://stackoverflow.com/questions/4632041/what-javascript-libraries-are-known-to-use-the-global-dollar-sign-window) — cliffs of insanity, May 13 '12 at 18:47

score 4 · Accepted Answer · edited May 23 '17 at 11:50

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At least two major ones:

PrototypeJS,
Mootools,

It is probably because using one char for most commonly used function saves a lot of time. And due to some restrictions for characters in variable name in JavaScript there are actually two candidates for such one-char names: $ and _ (_ is used often for eg. gettext functions or throw-away variables). Thus I would rather expect that if some framework has some shortcut function with one char name, it is probably $.

edited May 23 '17 at 11:50

Community

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answered May 13 '12 at 18:29

Tadeck

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Also, using one char for a global method makes your script more compact, it's not just a question of time. – Christophe May 13 '12 at 18:50

score 2 · Answer 2 · answered May 13 '12 at 18:29

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One of the common problems is several different versions of JQuery itself, though I'm not sure that is the reason in Drupal. Another possibility is Mootools

answered May 13 '12 at 18:29

Nanne

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Drupal says it is to avoid conflict between JS libraries themselves. – Jérôme Verstrynge May 13 '12 at 18:30
I meant that although it sounds like they mean different libraries, the same would be true for different versions of JQuery itself. So while a valid reason, I suspect that wasn't the primary goal in this case. – Nanne May 13 '12 at 18:32

score 1 · Answer 3 · answered May 13 '12 at 18:35

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zepto also uses $, and is a lightweight alternative to jQuery:

http://zeptojs.com/

In addition, it matches most of the jQuery API.

answered May 13 '12 at 18:35

Christophe

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Which Javascript library other than jQuery uses $?

3 Answers3