multiple-3rd-party-widgets.js

(function(d, script) {
    
    var js,
        fjs = d.getElementsByTagName(script)[0];
        
    function load(url, id) {
      if(d.getElementById(id)) {return;}
      js = d.createElement(script);
      js.async = true;
      js.src = url;
      id && (js.id = id);
      fjs.parentNode.insertBefore(js, fjs);
    }
    
    load('//apis.google.com/js/plusone.js');
    load('//platform.twitter.com/widgets.js');
    load('//s.widgetsite.com/widget.js');
    
}(document, 'script'));