Sharing Facebook API

Question

I have a responsive system, where I created a webview for android and Ios with this system to use it as an application. So far ok. So I implemented a Facebook share button as per Facebook documentation (https://developers.facebook.com/docs/sharing/web). I made the implementation by Javascript code.

I implemented for the web because the app is all on the web. In the app is only webview.

It even works, both on the desktop and in the app. However, after I share the app turns the screen all white, it doesn’t go back to my website url.

I believe this happens because when I share on the desktop, opens a facebook pop-up for me to share, and after I share this pop-up closes alone.

So I think this white screen in the app is because this pop-up has closed.

I think it would solve if I pass a redirect url to the Facebook API after sharing it, so I share it and then get redirected to some url.

But searching about it I found nothing in the Facebook documentation or on the Internet.

Could someone help me with some solution?

Thanks in advance!

================================

Follow button code for sharing on Facebook:

<!-- FACEBOOK -->
<div align="center" class="col-xs-8 col-md-8">
    <div align="center" class="fb-share-button" data-href="https://www.site.com<?php echo $_SERVER['PHP_SELF']; ?>" data-layout="button" data-size="small" data-mobile-iframe="false">
        <a target="_blank" href="https://www.facebook.com/sharer/sharer.php?u=https%3A%2F%2Fdevelopers.facebook.com%2Fdocs%2Fplugins%2F&amp;src=sdkpreparse" class="fb-xfbml-parse-ignore"></a>
    </div>
</div>
<!-- /FACEBOOK -->

And the Facebook Javascript SDK:

$(document).ready(function() {
    window.fbAsyncInit = function() {
        FB.init({
        appId            : 'APP_ID',
        autoLogAppEvents : true,
        xfbml            : true,
        version          : 'v2.12'
        });
    };

    (function(d, s, id){
        var js, fjs = d.getElementsByTagName(s)[0];
        if (d.getElementById(id)) {return;}
        js = d.createElement(s); js.id = id;
        js.src = "https://connect.facebook.net/en_US/sdk.js";
        fjs.parentNode.insertBefore(js, fjs);
    }(document, 'script', 'facebook-jssdk'));
});