PoC js deobfuscator for custom obfuscator for this file. It's PoC so code is pretty messy and there is a lot of false positives but deobfuscated code is still readable.
To run deobfuscator, first use any JS beautifier on obfuscated code, save it to script.js and then run:
node deoubfuscator.js
It will deobfuscate script from script.js and store deobfuscated version in deob_script.js