Where do I learn about scope?

You can use the scope in ThingWorx Studio to modify the properties of a widget or the parameters of an application.

For example, to modify the value of a variable called value through js:
$ scope.app.params.value = "";
For a widget it looks like this:
  $ scope.app.fn.triggerWidgetService ('popup-1', 'showpopup');
  $ scope.view.wdg ['model-1'] ['sequence'] = "";

Where do I check for the app that I call after scope, or something like view, fn, wdg?

If you have a tutorial on which class or function should appear when using scope, please share it.

thankㄴ