How to resolve Facebook Login is currently unavailable for this app ...
With the new Facebook changes on (I think) the Developer Dashboard > Facebook Login settings have been updated and now include a Allowed Domains for the JavaScript SDK section. The
Business Insider: How to log into Facebook on all your devices, even if you don't know your password
How to log into Facebook on all your devices, even if you don't know your password
2 Facebook does not allow you to change the "What's on your mind?" text box, unless of course you're developing an application for use on Facebook.
In the facebook developers console for your app, go to App Review-> Permissions and Features. Set the public_profile and email to have advanced access. This will allow all facebook users to have access and these two settings are auto granted. Ensure the Access Level indicates Advanced Access
Learn how to create a Facebook share link without using JavaScript, including tips and solutions for effective sharing.
Notice that you can play around with the fields you're querying for, the username and the objects you're requesting (in this case, videos). However, also notice that you must create your own access tokens and that queries you make will have your name on them, (so don't abuse this). You can play around (and create your own access token) with Facebook's API in their Graph Explorer Tool: https ...
I want to add facebook share button on my website, that should just post my website's content on the wall. Can anyone help me?
How to add facebook share button on my website? - Stack Overflow