Looking for Tips for Debugging and Developing web pages

Looking for Tips for Debugging and Developing web pages

I have a a couple of tasks. Both are web based projects. One has to be attached to a running browser running a local host based app. The other one I have found I can run directly through the browser.

The first thing I would like to discuss is what would make these two projets different so that they can only be tested and debugged differently.

The next thing I would like tips on is this. How does one debug actual html code in visual studio? Is this even possible?