I know there are about a hundred questions of this on SO, but none of them are maybe up-to-date with what seems to be happening on facebook platform right now. It seems the swit
You will still be able to use HTTP with “localhost” addresses, but only while your app is still in development mode.
You can change the App mode to Development Mode from App Dashboard:
In this mode you can only test your application with Facebook test user accounts. You can obtain the test accounts login credentials from your app dashboard.
Please note, http://localhost redirects are automatically allowed while in development mode only and do NOT need to be added in Valid OAuth Redirect URIs section.
Read more about it in this Facebook Blog.
paste this in your client json
"start": "set HTTPS=true&&react-scripts start",
next copy and enter this in your url bar .
chrome://flags/#allow-insecure-localhost,
and set Allow invalid certificates for resources loaded from localhost to enabled
This setting requires HTTPS for OAuth Redirects, and it requires and Facebook JavaScript SDK calls that return or require an access token are only from HTTPS pages. All new apps created as of March 2018 have this setting on by default, and you should plan to migrate any existing apps to use only HTTPS URLs by October 6, 2018.
Most major cloud application hosts provide free and automatic configuration of TLS certificates for your applications. If you self-host your app or your hosting service doesn't offer HTTPS by default, you can obtain a free certificate for your domain(s) from Let's Encrypt.
https://developers.facebook.com/docs/facebook-login/security
The most simple way to test your facebook login, since you cannot dissable anymore "Enforce HTTPS" option, is to use ngrok:
ngrok.com
Im linux user. After installing it just type at your terminal:
ngrok http 80
and automaticly will be created a new https domain just for your local project. You will see an ui interface in your terminal and your secure domain will be that who starts with https://
Copy the domain and use it in developers.facebook.com in your app to see if you code is good or not.
If is good its ok keep going until you will host your project on a secure domain.
For more info and docs about ngrok.com see: ngrok docs