EmberConf 2015 Day 2


Fault Tolerant UX by Dan Gebhardt


  • Users should be shielded from any application issues that are encountered

Transaction UX

  • Atomic: all or nothing
    • Ex. if a user fills out a form your app should save all the data, not just some.
  • Consistent: move between different states
  • Isolated: allows concurrent changes
  • Durable: changes are persisted

Apps MUST NOT violate the rules of transactional UX or you are violating the users trust

Forgiving User Experience

  • Fault Tolerant UX –> Forgiving UX
  • Transitional experience: to persist data that has not yet be saved, but in the process of being edited
  • Undo/redo
  • Offline support
  • Asynchronous interface (non-blocking)
    • user can make changes as quickly as possible (changes can be queued up and synced at your apps convenience)

Engineering Fault Tolerant UX

  • Ember provides simple elgant patterns for building a consistent UX
  • Similarly, ember data provides durable UX
  • Ember data requires customization (extra code) to provide atomic and isolated code


Orbit application patterns

  • Client first development
  • Pluggable sources
  • Data synchronization
  • Editing contexts
  • Undo/redo


  • Provides a store with synchronous and asynchronous methods

Aligning Ember with Web Standards by Matthew Beale



  • The JS standardization process is about to change: ES5, ES6, ES2015!
  • Standards Process
    • 5 stages - strawman, proposal(polyfills), draft(experimental), candidate(compliant), finished(shipping)
    • Polyfill: A polyfill is a piece of code (or plugin) that provides the technology that you expect the browser to provide natively.
  • 2 major standards groups:
    • WHATWG + W3C (html / dom related)
    • TC39 + Ecma International (promises, classes, for loops, etc)
  • Aligning with standards is not a one time event. It is ongoing!

Why Standards?

  • The goal is productivity
  • Standards are portable, reflect best preactices, and endure
  • Participants win

ES5 -> ES2015

  • New API for maps
  • Promises
  • Proxies


  • Babel will turn your ES6+ code into ES5 friendly code
    • Enables new syntax (fat arrow, let) , APIs (map, set), not everything

Aligning Ember’s Object Model

  • is this feature: stable? a good pattern? implemented correctly? implemented performantly?

ES Classes

  • Three new tools: class, extend, super
  • More gotchas:
    • setUnknownProperty
    • Transpiler output
    • New syntax
    • Changes in way that super behaves
    • Mixins

Remember: standards are a two-way street!

Ember Community Survey

Growing Ember One Tomster at a Time by Jamie White


How did a tech community come to be so vibrant? How can we continue?

1. The Tomster

  • Representation of productivity and friendliness
  • Tomster wore different hats
    • Custom tomsters
  • Good defaults
    • Having a friendly mascot makes things easier.
    • “Ambition” and “friendliness” is hard to juxtapose
  • Composing concepts

2. Language

  • Tomster is a tool. Productivity and friendliness implicitly part of conversation
    • Words stick; the right words enable conversations
    • “hack” is not a good vocabulary word - negative connotation

3. User Interface

  • Programming language and documentation with good user interface

4. Hackability

  • Parts have to be accesible - has to feel hackable.
    • Tomster was not overly done.

5. Roles

  • Many specialisms in Ember Community: documenteer, student, mentor, critic, explorer, and many more!

Community building is a design and engineering challenge

Interaction Design with Ember 2.0 and Polymer by Bryan Langslet


  • The web browser is the largest app runtime in the world, and will continue to grow
  • Every device has to be connected to the web
  • Web frameworks and toolkits are getting closer to native performance everyday

“How can I - one person with a laptop - leverage my time as powerfully as I possibly can, every minute I work?”


  • A paradigm shift for web interaction design
  • The goal: to blur the lines between native and web applications

Web Components

  • Extends the browser itself
    • Polymer components extend a base component
  • Encapsulation
  • Declarative
  • True reusability/portability

Ember vs. Polymer Use Cases:

  • Ember: developer productivity, conventions
  • Ember: community
  • Ember: World-class routing and state management
  • Polymer: constantly pushing the web forward

Web Animations API

  • Has the best of both CSS and javascript animations
  • Web animations run outside of the main thread and can be accelerated on the GPU

Treasure Hunt Demo Application

  • “Demonstrates an experimental integration between ember.js routing and Polymer’s core-animated-pages component to create beautiful inter-state animated transitions”

Building Applications for Custom Environments with Ember CLI by Brittany Storoz


Ember CLI

  • Everyones favorite command line tool
  • Build organized ember apps quickly
  • Fills huge void in toolset for JS devs

Ember CLI Addons

  • Extend ember-cli beyond core fucntionality
  • Follow standard npm conventions
  • Easy to create & install:

ember addon name-of-your-addon

ember install:addon name-of-your-addon

Firefox OS

  • Requirements that Ember CLI could not provide
    1. Generate and validate a manifest file (same concept as package.json)
    2. UI components that mimic OS interface
    3. Publish to Firefox marketplace
  • Ember CLI Addon was born to fill those requirements.

1st Requirement: Generating The Manifest

  • Creating Blueprints
    • rules for generating common code and file structures:

ember generate blueprint name-of-blueprint

2nd Requirement: FirefoxOS UI (Gaia)

  • Building components bower install gaia-components/gaia-stubs
  • 2 responsibilities:
    • including dependencies and creating the addon
    • making both available to the consuming application

Components Review

  • Dependencies:
    • bower install within addon
    • bower install withing consuming logic
  • Component logic
    • create component
    • export components to consuming aplication
    • define component template
  • Validation & Publishing
    • creating commands for control over when these things happen
    • includedCommands hook: returns object of commands which are found inside lb/commands
    • ember help lists out information about available add-on commands. And lots more useful info.

Building Real-time Applications with Ember by Steve Kinney


  • Integrating browser functionality and third party code into our applications. In this case, WebSockets.
  • What is a WebSocket Used for?
    • Collaboration, analytics dashboards, prompting user to upgrade application
  • Can I actually use WebSockets?
    • For the most part, yes (some earlier version of IE not supported)
  • Socket.io -> library for Node
  • Faye -> simple pub/sub messaging

Approach #1: Use Standalone Controller

  • Somewhat limited because it only works between controllers

Approach #2: Dependency Injection with Services

  • ember generate service websocket
  • Declare where you want to inject it inside the Initializer
  • Inside controller: websocket: Ember.inject.service()

Approach #3 Using Socket.io

  • Socket.io is both a server and client side library

What is your favorite thing about JavaScript?


1. Measuring Performance with User Timing API by Bill Heaton


  • Measuring the differences in template rendering speeds between Ember.js v1.8.1 w/Handlebars v1.3 and Ember.js v1.10.0 w/HTMLBars
  • Check out his findings on blog!

2. ember-islands by Mitch Lloyd


  • ember-islands
  • Render Ember components UJS-style to achieve “Islands of Richness”. You can arbitrarily render Ember components in the body of the page and they will all be connected to the same Ember app.

3. Ember Testing with Chemistry Dog by Liz Bailey


  • Migration from Rails to Ember
  • Ember does not provide as much documentation on testing
  • Would love to help make Ember more approachable to beginners

4. Running C++ in ember-cli with Emscripten by Michael Nutt


  • ember-cli-emscripten
  • Allows you to add C or C++ to your ember app, then require the exposed functions and classes.
  • Fibonacci sequence demo!

5. Ember Observer by Kate Gengler


  • Ember Observer
  • Gives addons a score out of 10
  • pulls hourly from npm and Github

6. CSS is Hard by Erik Bryn


Physical Design by Edward Faulkner


  • Computers are so abstract. Possibilities are endless, only hindered by your imagination.
  • Constrained by physics
  • Googles material design spec
    • does not break rules of physics
    • animations and motion appeal to us because they fit into our idea of how it should physically work.
  • Liquid Fire live demo!
    • npm install —save-dev liquid-fire for Ember 1.11+
  • Ember Paper

Closing Keynote: Chris Eppstein


Announcing: Eyeglass

  • Distribute SASS extensions as NPM modules for LIBSASS
  • Will be able to integrate with a number of different build systems, including Ember CLI
  • Major performance improvements
  • The best parts of SASS and Compass, working with the best tools JS has to offer

A Selection of Chris’ Inspirational Messages

  • “Don’t be a Sasshole”
  • “People come to a community for the tech, but stay for the love!”
  • “Sass didn’t lose when I started ignoring the haters”
  • “If you use a framework you love, you’ll never work a day in your life”
  • “Secret to a vibrant community: be excellent to eachother”


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