UserAgent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.132 Safari/537.36

Steps to reproduce the problem:
1. follow the steps on https://angular.io/ and create a new angular app.
2. run ng serve to build and serve the app.
3. open chrome (regular or canary), add the /src as a workspace directory
4. try to live debug and change src files - it's impossible. 

What is the expected behavior?
Using two of Google's flagships, the latest Chrome browsers and the latest Angular framework, I would expect being able to live debug, edit and persist src files for rapid and comfortable development.

What went wrong?
the files don't get automatically mapped and there's no way to manually map them.

Did this work before? No 

Chrome version: 65.0.3315.0 (Official Build) canary (64-bit)  Channel: canary
OS Version: 10.0
Flash Version: 

I'd appreciate your help