Manifest.json Unexpected Token

Question

Hello I pushed a react/express project up to heroku (https://polar-oasis-57801.herokuapp.com/) and received the following errors in the console: Chrome console error messages

Answer 1

I had a similar issue. I'll add it since this is the SO post I ended up at while trying to figure it out. I'd included some generated favicon markup to my "JS not allowed" file. My manifest.json is in my src/ directory, so the pasted in markup was referencing a manifest that wasn't in my public root. The boilerplate code then returned the "JS not allowed here" EJS HTML as the actual return value for the manifest.json, so the browser saw it as malformed JSON... Not ideal.

So, if your router is going to return this sort of thing for bad HTTP requests, like Ant Design Pro does, it could be your problem.