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Code of Conduct

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A framework for creating ambitious web applications.

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Climb the Mountain Together

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Climb the Mountain Together

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The Celery Test

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• Ember CLI • Six-Week Release Cycle • RFC Process • Code Mods • Templates • Engage with Standards • Invest in Community • Addons What We Did

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• tag • Web Components • Framework reboot • Ember Native What We Didn’t Do

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Progress Stability

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Aggressive Changes Cautious Changes Aggressive Changes

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Falling Behind Community Fragmenting Aggressive Changes Cautious Changes Aggressive Changes

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Falling Behind Community Fragmenting Em ber 1.13 Improvements • New rendering engine • Eliminate metamorph tags • Closure actions • Helper API • hasBlock Deprecations • Ember.View • {{view}} helper • Ember.Select • itemController • bind-attr

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Falling Behind Community Fragmenting Em ber 1.13 Em ber 2.0

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Falling Behind Community Fragmenting Em ber 2.0

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Ember 3.0

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Co

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Co

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this.get('firstName') this.set('lastName') this.firstName this.set('firstName') Co

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{{user-avatar user=this.currentUser}} Co

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{{input value="hello"}} Co

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Pit of Incoherence Incremental Change Where We Are Where We Want to Be

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Pit of Incoherence Incremental Change Where We Are Where We Want to Be

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Where We Are Where We Want to Be

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Where We Are Where We Want to Be

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Ready for Everyone Where We Are Where We Want to Be

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OCTANE

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OCTANE

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• No jQuery Required • JavaScript Classes • Angle Bracket Invocation • Glimmer Components • Tracked Properties Ember Octane A better component system

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• Off by default for new apps • Documentation, tests, addons updated to not need jQuery No jQuery Required

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No jQuery Required

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• Standard JavaScript syntax • Knowledge portability • Integration with IDEs, linters • Works well with TypeScript JavaScript Classes

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Classic Class import { computed } from '@ember/object'; import { inject as service } from '@ember/service'; import AjaxService from 'ember-ajax/services/ajax'; export default AjaxService.extend({ session: service(), namespace: '/api/v2', headers: computed('session.{isAuthenticated,header}', function() { if (this.get('session.isAuthenticated')) { return this.get('session.header'); } }) }); Source: Ember Observer

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JavaScript Class import { computed } from '@ember/object'; import { inject as service } from '@ember/service'; import AjaxService from 'ember-ajax/services/ajax'; export default class extends AjaxService { @service session; namespace = '/api/v2'; @computed('session.{isAuthenticated,header}') get headers() { if (this.session.isAuthenticated) { return this.session.header; } } }

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import { computed } from '@ember/object'; import { inject as service } from '@ember/service'; import AjaxService from 'ember-ajax/services/ajax'; export default class extends AjaxService { @service session; namespace = '/api/v2'; @computed('session.{isAuthenticated,header}') get headers() { if (this.session.isAuthenticated) { return this.session.header; } } } import { computed } from '@ember/object'; import { inject as service } from '@ember/service'; import AjaxService from 'ember-ajax/services/ajax'; export default AjaxService.extend({ session: service(), namespace: '/api/v2', headers: computed('session.{isAuthenticated,header}', function() { if (this.get('session.isAuthenticated')) { return this.get('session.header'); } }) }); Classic Class JavaScript Class

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import { computed } from '@ember/object'; import { inject as service } from '@ember/service'; import AjaxService from 'ember-ajax/services/ajax'; export default class extends AjaxService { @service session; namespace = '/api/v2'; @computed('session.{isAuthenticated,header}') get headers() { if (this.session.isAuthenticated) { return this.session.header; } } } import { computed } from '@ember/object'; import { inject as service } from '@ember/service'; import AjaxService from 'ember-ajax/services/ajax'; export default AjaxService.extend({ session: service(), namespace: '/api/v2', headers: computed('session.{isAuthenticated,header}', function() { if (this.get('session.isAuthenticated')) { return this.get('session.header'); } }) }); Classic Class JavaScript Class

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import { computed } from '@ember/object'; import { inject as service } from '@ember/service'; import AjaxService from 'ember-ajax/services/ajax'; export default class extends AjaxService { @service session; namespace = '/api/v2'; @computed('session.{isAuthenticated,header}') get headers() { if (this.session.isAuthenticated) { return this.session.header; } } } import { computed } from '@ember/object'; import { inject as service } from '@ember/service'; import AjaxService from 'ember-ajax/services/ajax'; export default AjaxService.extend({ session: service(), namespace: '/api/v2', headers: computed('session.{isAuthenticated,header}', function() { if (this.get('session.isAuthenticated')) { return this.get('session.header'); } }) }); Classic Class JavaScript Class

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import { computed } from '@ember/object'; import { inject as service } from '@ember/service'; import AjaxService from 'ember-ajax/services/ajax'; export default class extends AjaxService { @service session; namespace = '/api/v2'; @computed('session.{isAuthenticated,header}') get headers() { if (this.session.isAuthenticated) { return this.session.header; } } } import { computed } from '@ember/object'; import { inject as service } from '@ember/service'; import AjaxService from 'ember-ajax/services/ajax'; export default AjaxService.extend({ session: service(), namespace: '/api/v2', headers: computed('session.{isAuthenticated,header}', function() { if (this.get('session.isAuthenticated')) { return this.get('session.header'); } }) }); Classic Class JavaScript Class

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import { computed } from '@ember/object'; import { inject as service } from '@ember/service'; import AjaxService from 'ember-ajax/services/ajax'; export default AjaxService.extend({ session: service(), namespace: '/api/v2', headers: computed('session.{isAuthenticated,header}', function() { if (this.get('session.isAuthenticated')) { return this.get('session.header'); } }) }); Classic Class JavaScript Class import { computed } from '@ember/object'; import { inject as service } from '@ember/service'; import AjaxService from 'ember-ajax/services/ajax'; export default class extends AjaxService { @service session; namespace = '/api/v2'; @computed('session.{isAuthenticated,header}') get headers() { if (this.session.isAuthenticated) { return this.session.header; } } }

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import { computed } from '@ember/object'; import { inject as service } from '@ember/service'; import AjaxService from 'ember-ajax/services/ajax'; export default class extends AjaxService { @service session; namespace = '/api/v2'; @computed('session.{isAuthenticated,header}') get headers() { if (this.session.isAuthenticated) { return this.session.header; } } } import { computed } from '@ember/object'; import { inject as service } from '@ember/service'; import AjaxService from 'ember-ajax/services/ajax'; export default AjaxService.extend({ session: service(), namespace: '/api/v2', headers: computed('session.{isAuthenticated,header}', function() { if (this.get('session.isAuthenticated')) { return this.get('session.header'); } }) }); Classic Class JavaScript Class

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import { computed } from '@ember/object'; import { inject as service } from '@ember/service'; import AjaxService from 'ember-ajax/services/ajax'; export default class extends AjaxService { @service session; namespace = '/api/v2'; @computed('session.{isAuthenticated,header}') get headers() { if (this.session.isAuthenticated) { return this.session.header; } } } import { computed } from '@ember/object'; import { inject as service } from '@ember/service'; import AjaxService from 'ember-ajax/services/ajax'; export default AjaxService.extend({ session: service(), namespace: '/api/v2', headers: computed('session.{isAuthenticated,header}', function() { if (this.get('session.isAuthenticated')) { return this.get('session.header'); } }) }); Classic Class JavaScript Class

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Angle Bracket Invocation {{weather-tracker zip="10001"}}

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Angle Bracket Invocation

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• Easier to scan visually • One-word components • • HTML attributes Angle Bracket Invocation

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• Minimal base class • “Outer HTML” templates • Explicit, immutable arguments Glimmer Components

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Classic Component import Component from "@ember/component"; export default Component.extend({ tagName: 'button', elementId: 'my-button', classNames: ['btn'], classNameBindings: ['isDangerous:dangerous'], attributeBindings: ['isDisabled:disabled'], isDangerous: false, isDisabled: false, }); my-button.js my-button.hbs Click Me

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Click Me my-button.js my-button.hbs Click Me import Component from "@ember/component"; export default Component.extend({ tagName: 'button', elementId: 'my-button', classNames: ['btn'], classNameBindings: ['isDangerous:dangerous'], attributeBindings: ['isDisabled:disabled'], isDangerous: false, isDisabled: false, }); Glimmer Component my-button.hbs Classic Component

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• State of the art change tracking • Fast, efficient updates • “Just JavaScript” • No need for this.set() Tracked Properties

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Tracked Properties import Component from "@glimmer/component"; import { tracked } from "@glimmer/tracking"; import { action } from "@ember/object"; export default class extends Component { @tracked count = 0; @action increment() { this.count++; } }

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Computed Tracked Properties import Component from "@glimmer/component"; import { tracked } from "@glimmer/tracking"; export default class extends Component { @tracked firstName = "Godfrey"; @tracked lastName = "Chan"; get fullName() { return `${this.firstName} ${this.lastName}`; } }

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Tracked Properties, Anywhere import { tracked } from "@glimmer/tracking"; export default class Person { @tracked firstName; @tracked lastName; @tracked birthYear; constructor(firstName, lastName, birthYear) { this.firstName = firstName; this.lastName = lastName; this.birthYear = birthYear; } get age() { return (new Date()).getFullYear() - this.birthYear; } randomizeAge() { this.birthYear = 1900 + Math.round(Math.random() * 100); } }

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person = new Person("Godfrey", "Chan", 1988); 1. Create a new model instance 2. Pass it to a component 3. Mutate the model from the component @action randomize() { this.args.person.randomizeAge(); }

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One Simple Rule If you change a class field and want the DOM to update, make it tracked.

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• No jQuery Required • JavaScript Classes • Glimmer Components • Tracked Properties

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Current weather

New York, NY
55°
weather-tracker.hbs

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import Component from '@glimmer/component'; import { tracked } from '@glimmer/tracking'; export default class extends Component { @tracked temperature = 55; @tracked city = "New York, NY"; }

Current weather

{{this.city}}
{{this.temperature}}°
weather-tracker.hbs weather-tracker.js

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import Component from '@glimmer/component'; import { tracked } from '@glimmer/tracking'; export default class extends Component { @tracked temperature; @tracked city; async loadWeather() { const response = await fetch(`/api?zip=${this.args.zip}`); const { temperature, city } = await response.json(); this.temperature = temperature; this.city = city; } }

Current weather

{{this.city}}
{{this.temperature}}°
weather-tracker.hbs weather-tracker.js

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import Component from '@glimmer/component'; import { tracked } from '@glimmer/tracking'; export default class extends Component { @tracked temperature; @tracked city; async loadWeather() { const response = await fetch(`/api?zip=10001`); const { temperature, city } = await response.json(); this.temperature = temperature; this.city = city; } }

Current weather

{{this.city}}
{{this.temperature}}°
weather-tracker.hbs weather-tracker.js

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Current weather

{{this.city}}
{{this.temperature}}°
import Component from '@glimmer/component'; import { tracked } from '@glimmer/tracking'; export default class extends Component { @tracked temperature; @tracked city; async loadWeather() { const response = await fetch(`/api?zip=10001`); const { temperature, city } = await response.json(); this.temperature = temperature; this.city = city; } } weather-tracker.hbs weather-tracker.js

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import Component from '@glimmer/component'; import { tracked } from '@glimmer/tracking'; export default class extends Component { @tracked temperature; @tracked city; async loadWeather() { const response = await fetch(`/api?zip=${this.args.zip}`); const { temperature, city } = await response.json(); this.temperature = temperature; this.city = city; } }

Current weather

{{this.city}}
{{this.temperature}}°
weather-tracker.hbs weather-tracker.js

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import Component from '@glimmer/component'; import { tracked } from '@glimmer/tracking'; export default class extends Component { @tracked temperature; @tracked city; constructor() { super(...arguments); this.loadWeather(); } async loadWeather() { const response = await fetch(`/api?zip=${this.args.zip}`); const { temperature, city } = await response.json(); this.temperature = temperature; this.city = city; } }

Current weather

{{this.city}}
{{this.temperature}}°
weather-tracker.hbs weather-tracker.js

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Current weather

New York, NY
55°
HTML

Current weather

{{this.city}}
{{this.temperature}}°
Template DOM Output

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FUN

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P R E V I E W Today

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• Features available in stable, beta or canary • Try it out and give feedback • Review guides, update addons, etc. P R E V I E W emberjs.com/editions/octane

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Classic Octane ?

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Pipeline • New file layout • Template imports • Embroider

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Embroider • Faster builds • Asset optimization • Built on JavaScript modules

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HBS ES5 CSS Source Files “Lingua Franca” HBS SCSS • TypeScript, Flow, experimental JS… • Sass, Less, CSS Blocks… • Handlebars, Emblem… • Latest ECMAScript (e.g. ES2018) • CSS • Handlebars

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HBS ES5 CSS Packager • Optimize and compile for the browser APP.JS APP.CSS

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HBS ES5 CSS Packager • Optimize and compile for the browser APP.JS APP.CSS webpack Rollup

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2019 Roadmap

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Climb the Mountain Together

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Jen Weber Framework Chris Garrett Framework Robert Jackson Data Chris Thoburn Data Chris Manson Learning Amy Lam Learning Kenneth Larsen Learning Martin Muñoz Alumni Brendan McLoughlin Alumni Clemens Müller Alumni

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2018 Template-only components Brand guidelines Discord Optional jQuery JS classes in Ember Data Internal survey Broccoli 2 New Ember CLI docs Ember Times 51x Element modifiers emberjs.com is an Ember app Decorators ember-template-lint Tracked properties Documentary RecordData ember-auto-import Testing improvements Async leak detection New guides TOC Editions JS classes Rehydration Async testing Reader questions Public infra redux Babel parallel compilation Roadmap RFC

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Thank you!