Classic Ember

components.data-flow\.js

import Component from '@ember/component';

export default Component.extend({
  actions: {
    updateLastName(event) {
      this.set('lastName', event.target.value);
    }
  }
});

components.html-demo\.js

import Component from '@ember/component';

export default Component.extend({
  classNames: ["one", "two", "three"],
  
  //tagName: 'span',
  
  // Set some data attributes
  //'data-internal-attribute': true,
  //attributeBindings: ['data-internal-attribute'],
  
  // Event Handlers
  // mouseDown(event) {
  //   console.log('mouseDown');
  // },
  // click(event) {
  //   console.log('click', event.target.tagName);
  // },
  // mouseUp(event) {
  //   console.log('mouseUp');
  // },
  
  // in-built jquery
  // didInsertElement() {
  //   console.log(this.$().html());
  // },
});

components.lifecycle-hooks\.js

import Component from '@ember/component';

/*

LIFECYCLE HOOKS
* init
* didInsertElement
* willRender
* didRender
* didUpdateAttrs 
* didReceiveAttrs 
* willUpdate
* didUpdate
* willDestroyElement 
* willClearRender
* didDestroyElement

1. Initialising
2. Updating
3. Destroying

*/

export default Component.extend({
  init() {
    this._super(...arguments);
    console.log('init');
  },
  didInsertElement() {
    this._super(...arguments);
    this.$('input').focus();
    console.log('didInsertElement');
  },
  didRender() {
    this._super(...arguments);
    console.log('didRender');
  },
  didReceiveAttrs() {
    this._super(...arguments);
    console.log('didReceiveAttrs');
  },
  willUpdate() {
    this._super(...arguments);
    console.log('willUpdate');
  },
  didUpdate() {
    this._super(...arguments);
    console.log('didUpdate');
  },
  willClearRender() {
    this._super(...arguments);
    console.log('willClearRender');
  },
  willDestroyElement() {
    this._super(...arguments);
    console.log('willDestroyElement');
  },
  didDestroyElement() {
    this._super(...arguments);
    console.log('didDestroyElement');
  },
});

controllers.application\.js

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

/* ============================== */

export default Controller.extend({
  showLifecycleComponent: false,
  showHtmlDemoComponent: false,
  showDataFlowComponent: false,

	actions: {
    updateFirstName(event) {
      this.set('model.firstName', event.target.value);
  	}, 
  	updateLastName(event) {
      this.set('model.lastName', event.target.value);
  	},
    toggleComponent(property) {
      this.toggleProperty(property);
    }
  }
});

models.user\.js

import EmberObject, { computed } from '@ember/object';

export default EmberObject.extend({
  firstName: '',
  lastName: '',
  fullName: computed('firstName', 'lastName', function() {
    return `${this.firstName} ${this.get('lastName')}`;
  }),
}).reopenClass({
  someFunction() {
    console.log('Called from User');
  }
});

routes.application\.js

/**

EmberObject
* computed - push based reactivity. needs dependent keys vs getters
* Object.create() vs new Object()
* init vs constructor
* reopenClass vs static

**/

import Route from '@ember/routing/route';
import EmberObject, { computed } from '@ember/object';

const User = EmberObject.extend({
  init() {
    this._super(...arguments);
    console.log('USER INIT', ...arguments);
  },
  firstName: '',
  lastName: '',
  fullName: computed('firstName', function() {
    return `${this.firstName} ${this.get('lastName')}`;
  }),
}).reopenClass({
  someFunction() {
    console.log('Called from User');
  }
});

export default Route.extend({
  model() {
    // reopenClass function
    User.someFunction();
    return User.create({
      firstName: 'Travis',
      lastName: 'Bickle'
    });
  }
});

templates.application\.hbs

<h1>Classic Ember</h1>
<label>
  First name
  <input
   type="text"
   value={{this.model.firstName}}
   oninput={{action "updateFirstName"}}
  />
</label>
<label>
  Last name
  <input
  	type="text"
    value={{this.model.lastName}}
    oninput={{action "updateLastName"}}
  />
</label>
<hr>
User first name: {{this.model.firstName}}<br>
User last name: {{this.model.lastName}}<br>
User full name: {{this.model.fullName}}<br>

<hr>
<label>
  Show lifecycle component
  <input
  	type="checkbox"
    {{action "toggleComponent" "showLifecycleComponent"}}
    checked={{this.showLifecycleComponent}}
  />
</label>
<br>

{{#if this.showLifecycleComponent}}
  <LifecycleHooks
    @firstName={{this.model.firstName}}
    @lastName={{this.model.lastName}}
  />
{{/if}}

<hr>
<label>
  Show html component
  <input
  	type="checkbox"
    {{action "toggleComponent" "showHtmlDemoComponent"}}
    checked={{this.showHtmlDemoComponent}}
  />
</label>
<br>

{{#if this.showHtmlDemoComponent}}
  <hr>
  <HtmlDemo
    class="four"
    data-external-attribute
  />
{{/if}}

<hr>
<label>
  Show data flow component
  <input
  	type="checkbox"
    {{action "toggleComponent" "showDataFlowComponent"}}
    checked={{this.showDataFlowComponent}}
  />
</label>
<br>

{{#if this.showDataFlowComponent}}
  <hr>
  <DataFlow
    @lastName={{this.model.lastName}}
  />
{{/if}}

templates.components.data-flow\.hbs

{{!--
 * Non-Namespaced arguments
 * One way data-flow
   * local copy
--}}

<h2>Data flow component</h2>
First name: {{this.firstName}}<br>
First name dupe: {{firstName}}<br>
Last name: {{@lastName}}<br>
<br>

<label>
  Two-way binding data flow
  <input
  	type="text"
    value={{this.lastName}}
    oninput={{action "updateLastName"}}
  />
</label>

templates.components.html-demo\.hbs

<h2>Html demo</h2>

<button>Click me</button>

templates.components.lifecycle-hooks\.hbs

<h2>Lifecycle hooks</h2>
<input />

twiddle\.json

{
  "version": "0.17.1",
  "EmberENV": {
    "FEATURES": {},
    "_TEMPLATE_ONLY_GLIMMER_COMPONENTS": false,
    "_APPLICATION_TEMPLATE_WRAPPER": true,
    "_JQUERY_INTEGRATION": true
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/3.5.1/jquery.js",
    "ember": "3.18.1",
    "ember-template-compiler": "3.18.1",
    "ember-testing": "3.18.1"
  },
  "addons": {
    "@glimmer/component": "1.0.0"
  }
}