Add Facebook share button on Angular website

I have been asked to place a button to share company information on facebook.

I have found examples, although most of them only serve to share URLs, however when I try to integrate Facebook's api to share information with certain parameters, I am shown the one that FB is not defined.

then the code

  postStory(){
          FB.ui({
            method: 'feed',
            link: 'https://www.empresa.com',
            caption: 'Primer Demo',
            description:'Esto es una prueba',
            picture:'https://www.google.co.jp/logos/doodles/2014/doodle-4-google-2014-japan-winner-5109465267306496.2-hp.png',
          }, function(response){
              if(response && !response.error_message){
                $('#lb_msj').text('link posteado'+response.post_id);
              }
              else{
                $('#lb_msj').text('error ...');
              }
          });
      }

Someone knows how to correct the FB Error message is not defined