dfreeman

import Controller from '@ember/controller';
import { action } from '@ember/object';
import { tracked } from '@glimmer/tracking';

export default class ApplicationController extends Controller {
	@tracked events = [];

  @action clicked(kind) {
    this.events = [...this.events, kind];
  }

dfreeman

import Controller from '@ember/controller';

export default class ApplicationController extends Controller {
  clicked(message, stopPropagation, event) {
    alert(message);
    
    if (stopPropagation) {
      event.stopPropagation();
    }
  }

dfreeman

import Component from '@ember/component';

export default class extends Component {
  classNames = ['my-component'];
}

dfreeman

import Controller from '@ember/controller';

export default class ApplicationController extends Controller {
  appName = 'Ember Twiddle';
}

dfreeman

import Controller from '@ember/controller';

export default class ApplicationController extends Controller {}

customElements.define('test-element', class extends HTMLElement {
  set known(value) {
    this.innerText +=
      `el.known = ${JSON.stringify(value)}`;
  } 
  

dfreeman

import Controller from '@ember/controller';

export default class ApplicationController extends Controller {
  queryParams = ['foo'];
  foo = 'hello';
}

dfreeman

import Component from '@ember/component';
import { action } from '@ember/object';

export default class extends Component {
  init() {
    super.init();
    this.setShowYield(this.showYield);
  }
 
  @action

dfreeman

import Ember from 'ember';

export default Ember.Component.extend({
});

dfreeman

import Ember from 'ember';

export default Ember.Controller.extend({
  created: 76,
  completed: 45,
  failed: 21
});

dfreeman

import Ember from 'ember';

const items = Array.from(Array(250000), () => ({
  foo: 'hello',
  bar: 'goodbye'
}));

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',