jgwhite

import Ember from 'ember';
import { task, waitForProperty, timeout } from 'ember-concurrency';

const promptTask = task({
  answer: undefined,

  * perform() {
    yield waitForProperty(this, 'answer', a => a !== undefined);
    return this.answer;
  }

jgwhite

import Ember from 'ember';

export default Ember.Component.extend({
  tagName: '',
  
  willDestroyElement() {
    this.get('model').rollbackAttributes();
  }
});

jgwhite

IdP Config Flow
  SSO Not Installed
    Click begin setup -> SSO Not Configured
  SSO Not Configured
    Submit valid configuration -> SSO Disabled
    Submit valid configuration with enabled true -> SSO Enabled
  SSO Enabled
    Submit enabled false -> SSO Disabled
  SSO Disabled
    Submit enabled true -> SSO Enabled

jgwhite

import Ember from 'ember';

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

jgwhite

// mirage/scenarios/default.js

export default function(server) {

  function store() {
    let data = server.db.dump();
    let json = JSON.stringify(data);

    localStorage.mirage = json;
  }

jgwhite

import { focus, triggerKeyEvent } from '@ember/test-helpers';
import findButton from './find-button';
import { calculateTabsTo } from './tabbability';

const KEY_RETURN = 13;

export default async function keyboardClick(text) {
  let element = findButton(text);

  if (!element) {

jgwhite

import Ember from 'ember';

export default Ember.Controller.extend({
  items: ['one', 'two', 'three', 'four'],
  
  reorderItems(newOrder) {
    this.set('items', newOrder);
  },
  
  up(item) {

jgwhite

import Ember from 'ember';

export function add(numbers) {
  return numbers.reduce((sum, n) => sum + n);
}

export default Ember.Helper.helper(add);

jgwhite

import Ember from 'ember';

export default Ember.Component.extend({
  changeSomething() {
    this.set('data', Math.random());
  }
});

jgwhite

TL;DR Ember added contains before it was slated for ES7. When the contains (now includes) spec did arrive, it was a bit of a problem that Ember was “squatting” the method name with a slightly different implementation. Fortunately, Ember had been designed to “eventually align” with javascript as it becomes more capable. Thus, this was the moment prototype extensions were retired as a default.