CODEWITHSUNDEEP
javascriptjquery
codeGEN
codeGEN

Reputation: 714

Caching jQuery variables

I just read that if you are referring to the same DOM element over and over in a function it is better to cache them in a local variable like :

var btn = $('#clearBtn');

I have followed this where necessary but when accessing back this object I have always used $(btn).somemethod(); although we can access this directly like btn.somemethod();

I just need to know whether this will have a negative impact ?

Upvotes: 1

Views: 1071

Answers (2)

Yossi Shasho
Yossi Shasho

Reputation: 3640

btn.somemethod(); will work, and is the correct way, since btn is already a jQuery object.

Besides, unless you call $('#clearBtn'); a lot of times in a short period of time, I wouldn't bother caching it.

Upvotes: 0

Blender
Blender

Reputation: 298106

There's no point in passing the jQuery object through the jQuery constructor. It's just wasteful. If the dollar sign looks nice to you, just prepend it to the variable name and use $btn in place of $(btn):

var $btn = $('#clearBtn');

Upvotes: 2

Related Questions