CORS Issue

[Nineswiss]

I am running a React frontend an when I try to post I get:
Access to XMLHttpRequest at 'http://localhost:8000/ask' from origin 'http://localhost:3000' has been blocked by CORS policy: Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource.
I am new (very) to python so any help would be appreciated!

[caw083]

its the trouble of cors you need make the cors white list in django

may be try this

INSTALLED_APPS = [
# ...
'corsheaders',
# ...
]

MIDDLEWARE = [
# ...
'corsheaders.middleware.CorsMiddleware',
'django.middleware.common.CommonMiddleware',
# ...
]

CORS_ORIGIN_ALLOW_ALL = False
CORS_ORIGIN_WHITELIST = [
'http://localhost:3000',
# Add any other allowed origins here
]
After making these changes, restart your backend server.