How JavaScript treats lines starting with a dot?

Question

I try to understand the examples on angularjs.org. For example the following code snippet. How does this .value and .factory and .config work?

angular.module('project', ['ngRoute', 'firebase'])

.value('fbURL', 'https://angularjs-projects.firebaseio.com/')

.factory('Projects', function($firebase, fbURL) {
  return $firebase(new Firebase(fbURL)).$asArray();
})

.config(function($routeProvider) {
  ...

EDIT:

My point of not understanding the code above is the blank line after the first line and the line starting with a dot.

Answer 1

As standard dictates, unless there's a reason for ASI (like using postfix op, return, continue, throw or break statements), line terminators that separate language tokens are treated by JS as any other whitespace - that is, ignored. So these lines...

angular.module(arg1, arg2)
.value(arg3)
.controller(arg4)
.filter(arg5)

... are treated essentially the same as ...

angular.module(arg1, arg2).value(arg3).controller(arg4).filter(arg5)

So it's all about readability.