simple overflow table

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  
  rows: [
    'sdlkjghdflgfflgjhsdflgkjhdsflgflgjhsdflgkjhdsfjhsdflgkjhdsfjhsdflgkjhdsfsflflgjhsdflgkjhdsfgjhsdflgkjhdsflgkjhdsflgkjhsdfgh',
    'sdlkjghdsflgddlkjghdsflgjsdflgkjhdsflgkjhdsflgkjdlkjghdsflgjsdflgkjhdsflgkjhdsflgkjdlkjghdsflgjsdflgkjhdsflgkjhdsflgkjdlkjghdsflgjsdflgkjhdsflgkjhdsflgkjlkjghdsflgjsdflgkjhdsflgkjhdsflgkjjsdflgkjhdsflgkjhdsflgkjhsdfgh',
    'sdlkjghdsflgjhsdflgkjhdsflgkjhdsflgkjhsdfgh',
    'sdlkjghdsflgjhsdflgkjhdsfgkjdsflgkjhsdfgh',
    'sdlkjghdsflgjsdflgkjhdsflgjhsdflgkjhdsfflgkjhdsflgkjhgh',
    'sdlkjghdsflgjhsdflgkjhdsflgkjhdsfgkjhsdfgh',
    'sdlkjghdsflghsdflgkjflgjhsdflgkjhdsfhdsflgkjhdsflgkjhsdfgh',
    'sdlkjghdsflgflgjhsdflgkjhdsfjhsdflgkjhdsflgkjhdsflgkjhsdfgh',
    'sdkjghdsflgjhsdflflgjhsdflgjhsdflgkjhdsfflgkjhdsfgkjhdsflgkjhdsflgkjhsdfgh',
    'sdlkjghdsflgjhsdflgkjhdsflgkjhdsflgkjhsdfgh',
    'sdlkjghdsflgjhsdflgkjhdsfflgjhsdflgkjdsflgkjhdsflgkjhsdfgh',
    'sdlkjghdsflgjhsflgjhsdflgkjhdsfdflgkjhdsflgkjhdsflgkjhsdfgh',
    'sdkjghdsflgjhsdflgjhsdflgkjhdsfflgkjhdsflgkjhdsflgkjhsdfgh',
    'sdlkjghdsflgjhsdflflgflgjhsdflgkjhdsfjhsdflgkjhdsfgkjhdsflgkjhdsflgkjhsdfgh',
    'sdlkjghdsflgjhsdflgflgjhflflgjhsdflgkjhdsfgjhsdflgkjhdsfsdflgkjhdsfkjhdsflgkjhdsflgkjhsdfgh',
    'sdlkjghdsflghflgjhsdflgkjhdsfdflgkjhdsflgkjhdsflgkjhsdfgh',
    'sdlkjghdsflgjhsdfflgjhsdflgkjhdsflgkjhdsflgkjhdsflgkjhsdfgh',
    'sdlkjghdsflgjhsdflflgjhsdflgkjhdsfgkjflflgjhsdflgkjhdsfgjhsdflgkjhdsfhdsflgkjhdsflgkjhsdfgh',
    'sdlkjghdsflgjhsdflgkjhdsflgkjdsflgkjhsdfgh',
    'sdlkjghdsflgjhflgflgjhsdflgkjhdsfflgjhsdflgkjhdsfjhsdflgkjhdsfflgflgjhsdflgkjhdsfjhsdflgkjhdsfsdflgjhsdflgkjhdsfflgkjhflgjhsdflgkjhdsfdsflgkjhdsflgkjhsdfgh',
    'sdlkjghdsflgjhsdflgkjhdsflgkhdsflgkjhsdfgh',
    'sdlkjhdsflgjhsdflgjhsdflgkjhdsfflgkjhsfgkjhdsflgkjhsdfgh',
    'sdlkjghdflgjhsdflgkjhdsflgkjhdsflgkjdfgh',
    'sdlkjghdsflgjhsdflgkflgflgjhsdflgkjhdsfjhsdflgkjhdsfjhdsflgkjhdsflgkjhsdfgh',
    'sdlkjghdsflgjhsflgkflgjflgjhsdflgkjhdsfhsdflgkjhdsfjhdsflgkjhdsflgkjsdfgh',
    'sdlkjghdsflgjhsdflgkjhdsflgkjhdsflgkjhsdfgh',
    'sdlkjghdsfgjhsdflgkflgjhsdflgkjhdsfjhdsflgkjhdsflgkjhsdfgh',
    'sdlkjghdsflgjhsdflgkjhdflgjhsdflgkjhdsfflgkjhdsflgkhsdfgh',
    'sdlkjghdsflgjhsdflgkhdsflgkjhdsflgkjhsdfgh',
    'sdlkjhdsflgjhsdflgkjhdsflgkjhsflgkjhsdfgh',
    'sdlkjghdsflghsdflgflgjhsdflgkjhdsfkjhdsflgkjhdsflgkjhsfgh',
    'sdlkjghdsflgjhsdflflgjhsdflgkjhdsfgkjhdsflgkjhdsflgkjhsdfgh',
    'sdlkjghdsflgjhsdflgkjhdsflgkhdsflgkjhsdfgh',
    'sdkjghdsflgjhsdflgkjhdsflgkjhdsflgkjhsdfgh',
    'sdlkjghdsflgjhsdflgkjhdsflgkjhsflgkjhsdfgh'
  ]
});

styles.app.css

body {
  margin: 0;
  font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: 12pt;
}

table {
  border: 1px solid lightgrey;
}

tbody {
  display: block;
  height: 300px;
  width: 400px;
  overflow: auto;
}

td {
  padding: 10px;
  border: 1px solid steelblue;
}

templates.application.hbs

<div class="container">
  <table>
    <tbody>
    {{#each rows as |row|}}
      <tr>
        <td>{{row}}</td>
      </tr>
    {{/each}}
    </tbody>
  </table>
</div>

twiddle.json

{
  "version": "0.12.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.12.0",
    "ember-template-compiler": "2.12.0",
    "ember-testing": "2.12.0"
  },
  "addons": {
    "ember-data": "2.12.1"
  }
}