How to visually highlight / catch unnecessary DOM changes in Angular2 app

Question

I recently saw the video from Google I/O'17 https://www.youtube.com/watch?v=aCMbSyngXB4 and at 11:30 - 11:40 presenter make some click and after each of them automatically highlights dom elements that are changed with a nice green border and background.

Does some body know some chrome plugin, tool or code snippet that can help me do the same for my Angular2 app? Desirable for the whole app at once (not by adding something to each component)

I want this for performance optimization purpose to easily catch unnecessary DOM changes with my eye. That could happen because of some forgotten impure pipe for example.

Answer 1

I know one chrome feature which looks like: