What is slim in file.slim.js

Excuse my ignorance but I just installed jQuery using npm and between the jQuery files there's a file called `jquery.slim.js`, what is `slim`? I know the `min` stands for minified but slim is new to me!.

btw I'm pretty sure `slim` is not like `min` because there's another file called `jquery.slim.min.js` and obviously it's lighter than the normal slim file.

Also the `slim` file contains the jQuery 3 beta. (That's what the comments in the code say)

Again sorry for the stupid question but I got no clue.

**UPDATE**

I'm using `require` to include the files, would the require include this file without my knowledge? or not?

I don't know if `.slim.js` is a standard name extension for javascript library, but for jQuery, it is a build without some extensions, just check the beginning of the file:

> -ajax,-ajax/jsonp,-ajax/load,-ajax/parseJSON,-ajax/parseXML,-ajax/script,-ajax/var/location,-ajax/var/nonce,-ajax/var/rquery,-ajax/xhr,-manipulation/_evalUrl,-event/ajax,-effects,-effects/Tween,-effects/animatedSelector,-deprecated

Typically you have no `ajax` support (`jQuery.ajax` is not defined), no effects, and the deprecated method are removed.

Concerning requireJS, as far as I know if you require `jquery`, the only file "included" will be `jquery.js`, so you would have to explicitely require `jquery.slim` in order to get `jquery.slim.js` file included, which is not what you want.

THE SLIM VERSION – CONS
Possible compatibility issues
Even though jQuery Slim 3.0 is an ‘official’ release, its relative newness ensures that plugin and framework vendors have not had particularly much time to adapt their products to the feature set. If your company is currently going through a rocky transition adapting its products to jQuery 3.0, adding the extra grief caused by a deployment of the slim version is unlikely to be worth it. Problems caused by missing or incomplete implementations of support libraries tend to be among the most difficult to debug. Avoiding them is recommended to experienced and novice developers.

Deploying jQuery Slim saves you the princely sum of 6KB: many applications waste more than that on in-line comments in the markup. Of course, compile and parse time is also reduced – but does that really matter in a time when an octacore smartphone can be bought for fewer than 200 euros?


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it is a jquery with less features,
features that i needed so i gave up.
your mileage may vary, but fairly,
.slim.min was only 6kB less than just .min.