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// Place following script in header or start of view
<script>
    window.fbAsyncInit = function() {
        FB.init({
            appId: '<fb-app-id>',
            channelUrl: '<channel-url> //optional',
            status: true,
            xfbml: true
        });
    };
    
    (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 = "//connect.facebook.net/en_US/all.js";
        fjs.parentNode.insertBefore(js, fjs);
    }(document, 'script', 'facebook-jssdk'));
</script>

// Use this link in your html section, to share current page
<a href="#" onClick="publishOnFacebook()">Share on Facebook</a>

// Put this function in footer or end of view
<script>
    function publishOnFacebook() {
      FB.ui(
            {
                method: 'feed',
                name: '<post-name>',
                link: '<current-url>',
                picture: '<picture-url>',
                caption: '<caption-text> //usually website name',
                description: '<post-description-text>'
            },
            function(response) {
                if (response && response.post_id) {
                    alert('Post was published.');
                } else {
                    alert('Post was not published.');
                }
            }
        );
    }
</script>