JavaScript file not updating no matter what I do

Question

I have an external JavaScript file and whether in FireFox or Chrome, whether all browsing data is cleared, it will NOT update no matter what. I believe something happen

Answer 1

I was going insane trying to get my js files to refresh and I tried everything. Then I did a header check and remembered I was using Cloudflare!

In Cloudflare you can use dev mode to disable proxy.