What is the meaning of symbol $ in jQuery?

What does '$' - sign in JQuery stand for?

UserMay 19, 2012 at 2:35 AM
It is syntactic sugar. It is not specific only to jQuery, other libraries use it as well.
You can look for a full details article about the use of dollar sign in Javascript here.
ReplyDelete
Replies
UserMay 19, 2012 at 2:35 AM
The JQuery object :)

From the JQuery doc:

By default, jQuery uses "$" as a shortcut for "jQuery"

So, using $("#id") or jQuery("#id") is the same
ReplyDelete
Replies
UserMay 19, 2012 at 2:35 AM
As said in other answers $ is a shortcut to the jQuery function.

Some JavaScript libraries uses $ too (example: prototype). To avoid conflict with those other libraries jQuery provides jQuery.noConflict() function. Calling this function the control of the $ variable goes back to the other library that first implemented it. Doing this to use jQuery you can't do this $('div.someClass') anymore, instead jQuery('div.someClass').

Alternatively can do this:

jQuery.noConflict();

jQuery.ready(function($) {
// use $ for jQuery
}

//use $ for the other library

When writing plugins to avoid problems with the usage of noConflict you can pass 'jQuery' to a function:

function($) {

//use $ writing your plugin

}(jQuery)
ReplyDelete
Replies

CCNA, CCNP, MCSA, CCNA Final Exam, All Answer Test Module With 100/100