Tabset overflow

application.controller.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName:'Ember Twiddle'
});

application.template.hbs

{{#tab-set class="some-tab-set"}}
	<button class="some-tab">Tab one</button>
  <button class="some-tab">Tab two</button>
  <button class="some-tab">Tab three</button>
  <button class="some-tab">Tab four</button>
  <button class="some-tab">Tab five</button>
  <button class="some-tab">Tab six</button>
  <button class="some-tab">Tab seven</button>
{{/tab-set}}

services.window-dimensions.js

import Ember from 'ember';

export default Ember.Service.extend({
  
  init() {
    this._super();
    this.updateDimensions();
  	window.onresize = () => {
      this.updateDimensions();
		};
  },
  
  updateDimensions() {
  	this.setProperties({
      width: window.innerWidth,
      height: window.innerHeight
    });
  }
  
});

styles.app.css

body {
  margin: 12px 16px;
  font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: 12pt;
}


.tab-set {
 	display: flex;
  white-space: nowrap;
}
.tab-set > * {
	flex: 1 1 auto;
  overflow: hidden;
  cursor: pointer;
}
.tab-set_overflow {
	flex: 0 0 3em;
  border: 0 none;
  background: transparent;
  color: inherit;
  cursor: pointer;
}


.some-tab-set {
	color: white;
  background: #777;
  border-bottom: 1px solid black;
}
.some-tab {
  background: #444;
  margin-right: 1px;
  padding: .5em 1em;
  border: 0 none;
  color: inherit;
  cursor: pointer;
  /*text-overflow:ellipsis;*/
  transition: flex-shrink 200ms;
}
.some-tab:hover {
  background: #555;
  flex-shrink: 0;
  text-overflow: clip;
}

tab-set.component.js

import Ember from 'ember';

export default Ember.Component.extend({
  classNames: ['tab-set'],
  
  windowDimensions: Ember.inject.service(),
  
  hasOverflowTabs: Ember.computed('windowDimensions.{width,height}', function() {
		// let { width, height } = this.get('windowDimensions').getProperties(['width', 'height']);
    // return width < 400;
    return false;
  })
});

tab-set.template.hbs

{{yield}}
{{#if hasOverflowTabs}}
	<button class="tab-set_overflow">...</button>
{{/if}}

twiddle.json

{
  "version": "0.5.3",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "https://cdnjs.cloudflare.com/ajax/libs/ember.js/2.3.1/ember.debug.js",
    "ember-data": "https://cdnjs.cloudflare.com/ajax/libs/ember-data.js/2.3.3/ember-data.js",
    "ember-template-compiler": "https://cdnjs.cloudflare.com/ajax/libs/ember.js/2.2.0/ember-template-compiler.js"
  }
}