Another couple of tools that are useful for analysing apps/products that heavily utilise js.

- webpack bundle analyser

Use it to determine what’s in the bundle. Can give you insight into tools, APIs and other dependencies.

- shuji

Used to decompile minified js. Effectively you can read the bundle, see the directory structure. Perfect tool for learning.

[1] https://openbase.com/js/webpack-bundle-analyzer

[2] https://openbase.com/js/shuji