Express or react is removing headers

Question

I have a simple react and express setup. I\'m adding headers to a response but not all of them are available in the react app.

In Express...

app.post(\'/         


        

Answer 1

The Access-Control-Expose-Headers response header indicates which headers can be exposed as part of the response by listing their names.

By default, only the 6 simple response headers are exposed:

• Cache-Control
• Content-Language
• Content-Type
• Expires
• Last-Modified
• Pragma

If you want clients to be able to access other headers, you have to list them using the Access-Control-Expose-Headers header.

Access-Control-Expose-Headers