Facebook OAuth Unsupported in Chrome on iOS
You can use the redirection method as follow for this case (by detecting the user agent being chrome ios):
https://www.facebook.com/dialog/oauth?client_id={app-id}&redirect_uri={redirect-uri}
See more info here https://developers.facebook.com/docs/facebook-login/login-flow-for-web-no-jssdk/
Remark: I personnaly use the server OAuth in that case but this should do the trick and is quite simple
Facebook Login Button: Workaround for bug of Chrome on iOS
Solved by using Facebook authentication redirect.
https://developers.facebook.com/docs/facebook-login/manually-build-a-login-flow/
facebook javascript sdk login not working on iOS / best practices for mobile
This is common issue among mobile browsers and you will find that it would also be in some android devices.
For precaution it is under best practice to build flow of login manually.
Go here as your link.
So yes, you will need to go with manual integration. But, it will be full-proof integration without doubts.
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