What the $(“#?

Here’s a great question from the web board. What is it with the $(“# you will sometimes see in the code?

It’s a jQuery thing. Valid function names can start with a letter or certain special characters. “$” is a valid character to use in a function name. In this case, it’s the entire function name: $().

(jQuery is a utility library which is included in AppStudio apps)

jQuery’s $() function is a selector. It looks for elements in your app. It has a lot of different ways to select them:

You may see something like


The # means to look for an element with the id of “Button1”. What follows is the function to perform on the selected elements. There are a lot of functions that can be called:

By the way, you can also do the above as follows:


Rather than using a selector, we reference the control directly.