Access to XMLHttpRequest has been blocked by CORS policy

Question

I\'ve a problem when I try to do PATCH request in an angular 7 web application. In my backend I have:

app.use((re         


        

Answer 1

This problem is not on your frontend angular code it is related to backend,

Try below steps in your backend code :

1.npm install cors

2.put app.use(cors()) in main express route file.(enables all CORS requests)

may be it works for you.

reference link : https://expressjs.com/en/resources/middleware/cors.html