Sol 1:-  /* jshint esnext : true */ https://community.servicenow.com/community?id=community_question&sys_id=7f290fe1db5cdbc01dcaf3231f961990 Sol 2:- I was able to resolve this issue by adding this block of code at the top of each file.js that accused the error /*jshint esversion: 6 */ https://stackoverflow.com/questions/42866159/arrow-function-syntax-is-only-available-in-es6-use-esversion-6