When, if ever, should you use `jQuery` over `$`?

I was looking through some code and noticed:

button: function(e) {
e.preventDefault();
var $target = jQuery(e.target);
var link = $target.attr('href');


I was just a little unclear about the line var $target = jQuery(e.target);.

var $target = jQuery(e.target);

Why use jQuery here?

jQuery

$target

$

jQuery

jQuery.noConflict()

$

1 Answer
1

Usually you would like to use jQuery instead of $, when the latter conflicts with a globar variable from another library.

jQuery

$

For instance, see this list: What JavaScript libraries are known to use the global dollar sign: window.$?

In that case, jQuery provides the noConflict() method, which:

noConflict()

Relinquish jQuery's control of the $ variable.

The documentation also states:

In jQuery's case, $ is just an alias for jQuery, so all functionality is available without using $. If you need to use another JavaScript library alongside jQuery, return control of $ back to the other library with a call to $.noConflict(). Old references of $ are saved during jQuery initialization; noConflict() simply restores them.

$

jQuery

$

$

$.noConflict()

$

noConflict()

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