cache « selector « jQuery Q&A

1. Does jQuery do any kind of caching of "selectors"?    stackoverflow.com

For example, will the first piece of code perform a full search twice, or is it smart enough to cache results if no DOM changes have occurred?

if ($("#navbar .heading").text() > "") ...

2. Reuse cached selector inside a child selector    stackoverflow.com

var $container = $('div#myContainer');
var $panels = $('div#myContainer > div');

3. Cached Jquery selector behavior that I do not understand    stackoverflow.com

Given the following code why am I getting different values for a and b? I would have thought they would return the same thing:

(function() {
    var a = ...

4. How do I cache jQuery selections?    stackoverflow.com

I need to cache about 100 different selections for animating. The following is sample code. Is there a syntax problem in the second sample? If this isn't the way to cache ...

5. Caching of jQuery references    stackoverflow.com

Is it always best practice to use:

var $this = $(this);

6. Can you use a nth-child selector on a previously cached jQuery selector?    stackoverflow.com

When working with the DOM, I tend cache an item, detect if it is present, then perform some work. Like so:

var $fooModules = $j('.foo-modules');

if ($fooModules .length > 0) {
   ...

7. Is ID selector faster than class selector when it is cached in jquery    stackoverflow.com

I know that ID is a faster selector than class in Javascript. But what if I cache the selector? When the selector is cached, would it differ in speed if it’s ...

8. jQuery caching selectors    stackoverflow.com

I have div with id #wrapper and all element are inside it. I'm caching wrapper by doing

var $wrapper = $('#wrapper');

9. jQuery global selection "cache"    stackoverflow.com

I don't think I'm the first one to run into this issue but I haven't find a way to search for this without getting results that have nothing to do with ...

10. Caching JQuery Selectors inside JS object    forum.jquery.com

I have a complex JS object. It manipulates the page DOM. Inside it I have many repetitive selections spread across functions. I would like to cache the selectors to enhance performance. How do other people do this? I can cache on the function level but not the object. When I try to cache on the object level ...

11. [jQuery] caching result of selector in object, reusing    forum.jquery.com

[jQuery] caching result of selector in object, reusing in Using jQuery 2 years ago Hi,I have some selectors - an example would be $("#LinkToPreviousHit")all of which work fine when used directly.If I use it to toggle the class, which also works, I might do -$("#LinkToPreviousHit").attr({"class": "activeNavButton"});since I am using my selectors in multiple places I figured ...

12. [jQuery] does selectors $ cache?    forum.jquery.com

No, it does not cache. Each time you make a page query, a new call is made.For better performance, always cache commonly used selectors:$myID = $('#myID'); // $ used for initial var to indicate a jQuery objectvar text = $myID.text();var color = $myID.css('color');Also, you should always use the raw ID reference where possible as it's farmore performant than tacking on a ...