A '$' in a variable means nothing special to the interpreter, much like an underscore. From what I've seen, many people using jQuery (which is what your example code looks like to me) tend to prefix …

Dec 28, 2011 · The $ is an alias for jQuery which (jQuery) is a Javascript library. Plug-ins are usage of the library in a specific fashion which create specific use of the library and extend its functionality.

here is a code that is working: the jQuery will treat only the buttons that are of class .cls-hlpb, it will take the id of the button that was clicked and will change it according to the data that comes from the ajax.

Jan 21, 2021 · When inside a jQuery method’s anonymous callback function, this is a reference to the current DOM element. $ (this) turns this into a jQuery object and exposes jQuery’s methods. A …

Jun 26, 2009 · It is shorthand for jQuery (). Which you can use if you want. jQuery can be ran in compatibility mode if another library is using the $ already. Just use jQuery.noConflict (). $ is pretty …

$("div.id_100 > select > option[value=" + value + "]").prop("selected",true); Where value is the value you wish to select by. If you need to removed any prior selected values, as would be the case if this is …

Jul 10, 2009 · jquery (E) solution is quite-fast on big tables jquery (E) and querySelectorAll (H) solutions are slowest for small tables getElementByName (G) and querySelectorAll (H) solutions are quite …

Learn how to retrieve the selected option from a dropdown menu using jQuery in this Stack Overflow discussion.

Sep 9, 2013 · Jquery.ajax does not encode POST data for you automatically the way that it does for GET data. Jquery expects your data to be pre-formated to append to the request body to be sent …

Oct 15, 2010 · Advantages: Straight-forward, no dependency on jQuery, easy to understand, no issues with preserving the meaning of this within the body of the loop, no unnecessary overhead of function …