The css class is simple enough. It just hides the label when we don’t want to see it.
Now, we can run some simple jQuery when the event occurs where we want to show the loading label (in this case, a button click) to remove the css class from the element that is causing it to be hidden:
All we have to do now is hide the loading label by adding the appropriate css class after our work is finished on the server-side:
Easy, right? I love easy!