Q:

Rails: browser can't scroll

I use embedly card to display my content. After it call its javascript file, it will change link into a embedly card.
I have deployed into heroku
https://intelligent-madame-5204.herokuapp.com/
However, after it become a embedly card, I can't use mouse to scroll down. 
I put this javascript in application.js
(function(w, d){
   var id='embedly-platform', n = 'script';
   if (!d.getElementById(id)){
     w.embedly = w.embedly || function() {(w.embedly.q = w.embedly.q || []).push(arguments);};
     var e = d.createElement(n); e.id = id; e.async=1;
     e.src = ('https:' === document.location.protocol ? 'https' : 'http') + '://cdn.embedly.com/widgets/platform.js';
     var s = d.getElementsByTagName(n)[0];
     s.parentNode.insertBefore(e, s);
   }
  })(window, document);

And I put link like this way in index.html.erb
<%= link_to "Learn More",posts.content, class: "embedly-card" %>

A:

Scrollbars can be turned on and off using CSS and that seems to be the issue. 
Looking at the generated CSS it seems overflow: hidden; is being set in the body selector. If you can figure out a way to change this to overflow: auto; this would solve the issue. Unfortunately I have never used embedly and can't point you as to where the body {} might be generated from. 

