boom

components.my-component.js

import Ember from 'ember';

export default Ember.Component.extend({
  options: [{value: 'A', show: true},
            {value: 'B', show: true},
            {value: 'C', show: true}
           ],
  
  listItems: [],
  
  didRender() {
		Ember.$(window).on('resize', Ember.run.bind(this, this.handleResize));
    this.set('listItems', this.$('.list-item'));
  },
  
  handleResize() {
	  Ember.run.debounce(this, this.doMyMagic, 500);
  },
  
  shouldRerender: true,
  
  doMyMagic() {
    const bodyRect = document.body.getBoundingClientRect();
    
    if (bodyRect.width < 700) {
    
      const $items = this.get('listItems');
      let options = this.get('options');

      for (let i = 0; i < $items.length; i++) {
        let $item = $items[i];
        let itemRect = $item.getBoundingClientRect();

        let hideOrNot = (itemRect.right + itemRect.width + 50);

        if (hideOrNot > bodyRect.width) {
          Ember.set(options[i], 'show', false);    

        } else {
          Ember.set(options[i], 'show', true);    
      }
        
      this.set('options', options);
	    this.set('shouldRerender', new Date());
			}
    }  
  }
});

controllers.application.js

import Ember from 'ember';

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

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<br>
{{my-component}}
<br>
<br>

templates.components.my-component.hbs

  <div class='first-list'>Main list
    {{#each options as |option index|}}
      {{#if option.show}}
          <span class='list-item' style='display: inline-block; width: 100px; border: 1px solid red;'>{{option.value}}!</span>
      {{/if}}
    {{/each}}
  </div>

  <div class='second-list'>More list
		{{#each options as |option index|}}
      {{#unless option.show}}
       <span class='list-item' style='display: inline-block; width: 100px; border: 1px solid green;'>{{option.value}}!</span>
      {{/unless}}
    {{/each}}
  </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"
  }
}