Is “Page Source” BEFORE or AFTER JavaScript has been rendered?

Question

In Firefox there is a menu item that displays \"Page Source\": View | Page Source (Ctrl+U). In Internet Explorer there is a similar function.

When you invoke it, it

Answer 1

The "View Source" code is the code before any JavaScript is applied.

Firefox's Web Dev toolbar will allow you to view the resulting post-JavaScript source code from the View Source > View Generated Source menu option.