Uncaught (in promise) TypeError: Failed to fetch and Cors error

Question

having a problem with getting data back from database. I am trying my best to explain the problem.

1.If I leave \"mode\":\"no-cors\" inside the code below, then I ca

Answer 1

See mozilla.org's write-up on how CORS works.

You'll need your server to send back the proper response headers, something like:

Access-Control-Allow-Origin: http://foo.example
Access-Control-Allow-Methods: POST, PUT, GET, OPTIONS
Access-Control-Allow-Headers: Origin, X-Requested-With, Content-Type, Accept, Authorization

Bear in mind you can use "*" for Access-Control-Allow-Origin that will only work if you're trying to pass Authentication data. In that case, you need to explicitly list the origin domains you want to allow. To allow multiple domains, see this post