GULP assembly, how to disassemble for editing?

Question

gulp.js

Good afternoon! Faced such a question - you need to create (modify ajax request) in a project that is assembled by GULP. I can’t find the request I need in one final js file 'main.bundle.js', the file (content) will look like one line. Can I somehow unpack this 'main.bundle.js' to change what is needed, well, or what needs to be done to get the usual js and css to edit them.
Thanks in advance!