how to extract the html and css of installed app from mobile

Question

We can get the source HTML, JS and CSS for a website by right-click and getting the source code. Is there any way we can get the same for installed Mobile app?

It is for my app. I developed a UI and installed it in my mobile to test it. Later I made some changes to my UI and couldn't recover my old changes. So I'm trying to recover it from my mobile. Any help would be appreciated.

Answer 1

Change file extension from ipa or apk to zip .
Then extract it somewhere. By skimming through those files you could find those html, js and css files.