Twitter API authorization fails CORS preflight in browser

Question

I\'m trying to do the 3-legged authorization necessary to call the Twitter APIs in a browser. The process starts with getting a request token by POSTing a signed request to

Answer 1

A workaround and it is a long way around is to build a proxy server that you run with node or something else, I've done this a few times now, this is a good starter repo for someone running into this issue. It has the downside of being React specific, but you could always rip out the react ui and just setup with whatever you need: hcra twitter build.

Its forked from a Create React App/Node Express boilerplate by Mars Hall

You will need to clone it and run git fetch and then checkout twitter-req branch.