Angular Javascript Framework

Building web-applications is hard! Even the simplest hello world application will take you hours to set up and you have to know a lot about how many different pieces of technologies work together. Here is a quick inventory from the browser to the back end of what a typical web-application developer needs to know about: HTML, CSS, JavaScript, cookies, HTTP, URL encodings, Servlets, web-framework (i.e. web-work), authentication, threading, SQL, ObjectRelational mappers, DB Schema, RDMS, DB indexing. If you know all of that, than you have a good chance that after week of work, you can have a hello world application written which will allow the user to authenticate, and persist some data.