I can hit this endpoint, http://catfacts-api.appspot.com/api/facts?number=99 via Postman and it returns JSON Additionally I am using create-react-app and would like to avoid setting up any server config. In my client code I am trying to use fetch to do the same thing, but I get the error: No ‘Access-Control-Allow-Origin’ header is present on the requested … Read more
The issue could be with the response you are receiving from back-end. If it was working fine on the server then the problem could be with the response headers. Check the Access-Control-Allow-Origin (ACAO) in the response headers. Usually react’s fetch API will throw fail to fetch even after receiving response when the response headers’ ACAO and the … Read more
With ES2017 async/await support, this is how to POST a JSON payload: Expand snippet Can’t use ES2017? See @vp_art’s answer using promises The question however is asking for an issue caused by a long since fixed chrome bug.Original answer follows. chrome devtools doesn’t even show the JSON as part of the request This is the … Read more
This answer covers a lot of ground, so it’s divided into three parts: How to use a CORS proxy to get around “No Access-Control-Allow-Origin header” problems How to avoid the CORS preflight How to fix “Access-Control-Allow-Origin header must not be the wildcard” problems How to use a CORS proxy to avoid “No Access-Control-Allow-Origin header” problems … Read more