CODEWITHSUNDEEP
c#asp.net
Caffeinated
Caffeinated

Reputation: 12484

What is the dollar symbol used for in ASP.net?

I know this might be a newbie question, but every-time i see code like this:

var table = $("table[title='Refresh']");

And also code like this:

 $(function () {
        $("#datepicker").datepicker();
    });

i always sort of glaze over the $ symbol . It's a type of placeholder? or does it signify that its dynamic?

Upvotes: 0

Views: 2352

Answers (6)

Icarus
Icarus

Reputation: 63970

The $ is not related to ASP.NET in particular, but rather to the possible use of jQuery or Prototype which both use the $ as an alias for a function. In the case of jQuery, $ is just a shortcut for not having to write jQuery as in the following example:

jQuery('selector').datepicker()

Is the same as writing 

$('selector').datepicker()

jQuery provides the noConflict() method precisely to avoid conflicts with any other Javascript framework that may use the same $ alias.

Upvotes: 3

Servy
Servy

Reputation: 203841

That is JavaScript code. In JavaScript, $ is a legal name for a function or variable. It just means that someone defined a function with that name. You could define one yourself simply enough:

function $(){return "hello world";}

Then $() would print "hello world".

Most famously, JQuery uses it as their selector function, in which it is used to query the page's DOM in a more powerful syntax than JavaScript's built in DOM querying methods, but there's nothing that guarantees that $ is JQuery's usage, it could be anything. (Note that I highly discourage you from actually defining $ yourself and using it as a function, as virtually all JS developers have learned to read it as the JQuery's implementation.)

Upvotes: 1

DevelopmentIsMyPassion
DevelopmentIsMyPassion

Reputation: 3591

This is jquery syntax of using $ symbol. Read more here http://www.learningjquery.com/2006/09/introducing-document-ready

Upvotes: 1

JudgeProphet
JudgeProphet

Reputation: 1729

It's the Shortcut / Alias to use in jQuery. Can be replaced with "jQuery " keyword."

Upvotes: 1

System Down
System Down

Reputation: 6270

This isn't part of ASP.NET, it's actually part of the JQuery library, which is a JavaScript library used for client side processing.

http://jquery.com/

Upvotes: 1

driis
driis

Reputation: 164341

It is a JavaScript function, most likely jQuery. Many JS frameworks define $ as a root selector function, jQuery being the most famous/used of those.

It has nothing to do with ASP.NET.

Upvotes: 10

Related Questions