How to deobfuscate Javascript in Google Chrome?

Question

JavaScript

There is a site that uses javascript code (by clicking on a button), the principle of which needs to be studied.
The code is heavily obfuscated and is one long line.
On this there are two questions:
- Are there any special tools that can help in this matter?
- How to properly set up the Chrome console so that I can edit the file under study (adding line breaks, renaming variables) and my changes are not lost when the page is reloaded. I tried to map a remote file to a local one - but it didn't work.

Answer 1

in sources, open the desired file and click on the mustache in the lower left corner