Building a Single Page Application using Ember.js ... for fun and profit

Building a Single Page
App with Ember.js
…for fun and proﬁt!

largest free entrepreneurial event of its kind in
North America

Ben Limmer
blimmer
@l1m5
hello@benlimmer.com
ember.party

$5
cash back
$10
cash back
$10
cash back

show rebates
it needs to
allow registration
allow account mgmt
provide cash out
explain how it works
show where it works
…
build a shopping list
be location aware
track all the things

client rendered?
(single page app)

single page apps are not
always the best choice.

pre-render challenges
(seo, social share)
overkill for simple sites
some duplication
of backend data
requires (building)
an API

very
un-opinionated
very
opinionated

so why did we go with
Ember @ Ibotta?

convention over
conﬁguration

– Ruby on Rails Guides
“conventions will speed up development, keep
your code concise and readable and - most
important - these conventions allow you an easy
navigation inside your application.”
https://en.wikibooks.org/wiki/Ruby_on_Rails/Getting_Started/Convention_Over_Conﬁguration* emphasis mine

structure of an ember app
app
├── components
├── controllers
├── helpers
├── models
├── routes
├── styles
└── templates
└── components
tests
├── helpers
├── integration
│ └── components
└── unit

who cares? it’s just a
framework…

*Icons made Freepik from www.ﬂaticon.com is licensed by CC BY 3.0

knowledge in the head
vs.
knowledge in the world
adapted from concepts in Don Norman’s
The Design of Everyday Things

used by
many
used by
few

used by
few
used by
many
more knowledge
in the head

used by
few
used by
many
more knowledge
in the head
more knowledge
in the world

best practices are
established

testing
routing data deﬁnition
validation i18n
builds deployment
dev tools
upgrade paths

“there’s an
add-on for that”

automated
testing
out-of-the-box support
w/ qunit and phantom

modern
language
features
out-of-the-box support
for ES6/ES2015++ with
Babel.js

✓Array comprehensions
✓Arrow functions
✓Async functions
✓Async generator functions
✓Classes
✓Class properties
✓Computed property names
✓Constants
✓Decorators
✓Default parameters
✓Destructuring
✓Exponentiation operator
✓For-of
✓Function bind
✓Generators
✓Generator comprehensions
✓Let scoping
✓Modules
✓Module export extensions
✓Object rest/spread
✓Property method assignment
✓Property name shorthand
✓Rest parameters
✓React
✓Spread
✓Template literals
✓Type annotations
✓Unicode regex

design
frameworks
plug-and-play support for
the most popular design
frameworks and
preprocessors

i18n
ember i18n
您好
Здравствуйте!
hello
bonjour
hola

“there’s (not) an
add-on for that”

400 members
(and growing)
Denver Devs

…but ﬁrst
initial questions?

structure of our app
app
├── components
├── controllers
├── helpers
├── models
├── routes
├── styles
└── templates
└── components
tests
├── helpers
├── integration
│ └── components
└── unit

./app/templates/application.hbs
1 <h2 id="title">Welcome to Ember</h2>
2
3 {{outlet}}
Live reload demo here.

Hello Denver!

$ ember install ember-cli-materialize
$ ember install ember-i18n

I18n
1 
2 <div class="home-feature">
3 <div class="feature-content">
4 <h1>{{t 'index.headline'}}</h1>
5 <h3>{{t 'index.subTitle'}}</h3>
6 </div>
7 </div>
1 // ./app/locales/en/translations.js
2 export default {
3 'index': {
4 'headline': 'Frozen Bananas!',
5 'subTitle': 'Coming Soon'
6 }
7 };

I18n
6 </div>

I18n
1 // ./app/locales/en/translations.js
2 export default {
3 'index': {
4 'headline': 'Frozen Bananas!',
5 'subTitle': 'Coming Soon'
6 }
7 };

$ ember generate
acceptance-test index

./tests/acceptance/index-test.js
1 // ...
2
3 test('visiting /index', function(assert) {
4 assert.expect(3);
5 visit('/');
6
7 andThen(function() {
8 assert.equal(currentURL(), '/');
9 let headline = find('.home-feature h1');
10 assert.equal(headline.length, 1);
11 assert.equal(headline.text(), 'Frozen Bananas!');
12 });
13 }); Promise explainer Here?

5 visit('/');

1 // ...
2
3 test('visiting /index', function(assert) {
4 assert.expect(3);
5 visit('/');
6
12 });
13 });

12 });

√ ok 1 PhantomJS 2.0 - Acceptance | index: visiting /index

./app/router.js
1 import Ember from 'ember';
2 import config from './config/environment';
3
4 var Router = Ember.Router.extend({
5 location: config.locationType
6 });
7
8 Router.map(function() {
9 this.route('about');
10 });
11
12 export default Router;

./app/router.js
8 Router.map(function() {
9 this.route('about');
10 });

./app/templates/about.hbs
1 <div class="container">
2 {{#md-card
3 title=(t 'about.title')
4 class="teal"
5 titleClass="white-text"
6 bodyClass="white-text"
7 id="address-card"}}
8 {{#md-card-content class="white-text"}}
9 <p>{{t 'about.number'}}</p>
10 <p>{{t 'about.street'}}</p>
11 {{/md-card-content}}
12 {{/md-card}}
13 </div>

2 {{#md-card
3 title=(t 'about.title')
4 class="teal"
12 {{/md-card}}

9 <p>{{t 'about.number'}}</p>
10 <p>{{t 'about.street'}}</p>

./app/templates/index.hbs
5 <div class="about-link">
6 {{#link-to 'about'}}
7 <img src="/images/banana_grabber.png">
8 {{/link-to}}
9 </div>
10 </div>
11 </div>

8 {{/link-to}}
9 </div>

$ ember generate
acceptance-test about

./tests/acceptance/about-test.js
1 // ...
2
3 test('visiting /about from index', function(assert) {
4 visit('/');
5 click('.about-link img');
6
8 assert.equal(currentURL(), '/about');
9 });
10 });

√ ok 1 PhantomJS 2.0 -
Acceptance | about: visiting /about from index

$ ember generate
model company-address

./app/models/company-address.js
1 import DS from 'ember-data';
2
3 export default DS.Model.extend({
4 name: DS.attr('string'),
5 street1: DS.attr('string'),
7 city: DS.attr('string'),
8 state: DS.attr('string'),
9 zip: DS.attr('string') //string not number
10 });

./app/models/company-address.js
4 name: DS.attr('string'),
7 city: DS.attr('string'),
8 state: DS.attr('string'),
9 zip: DS.attr('string') //string not number

./app/routes/about.js
2
3 export default Ember.Route.extend({
4 model() {
5 return this.get('store').findAll('company-address');
6 }
7 });

Objects not Callbacks
Complete or Not

Traditional async
1 asyncCall1(function() {
6 finalCall();
7 });
8 });
9 });
10 });
11 });

Chained Promises
1 asyncCall1()
2 .then(asyncCall2)
3 .then(asyncCall3)
4 .then(asyncCall4)
5 .then(asyncCall5)
6 .then(finalCall);

Chained Promises
1 asyncCall1()
2 .then(asyncCall2)
3 .then(asyncCall3)
4 .then(asyncCall4)
5 .then(asyncCall5)
6 .then(finalCall)
7 .catch(errorHandler);

./app/routes/about.js
4 model() {
5 return this.get('store').findAll('company-address');
6 }

1 <div class="container">
2 {{#md-card
3 title=model.lastObject.name
4 class="teal"
9 <p>{{model.lastObject.street1}}</p>
11 <p>
12 {{model.lastObject.city}}, {{model.lastObject.state}}
13 {{model.lastObject.zip}}
14 </p>
16 {{/md-card}}
17 </div>
Demo, show error page

11 <p>
12 {{model.lastObject.city}}, {{model.lastObject.state}}
13 {{model.lastObject.zip}}
14 </p>
Demo, show error page

./app/templates/error.hbs
1 <div class="error-page">
2 <h1>Ooops!</h1>
3 {{shrug-guy}}
4 </div>

3 {{shrug-guy}}

¯_(ツ)_/¯

$ ember install ember-cli-mirage

$ ember generate
fixture company-addresses

./app/mirage/ﬁxtures/company-addresses.js
1 export default [
2 {
3 id: 1,
4 name: 'Bluth's Banana Stand',
5 street1: 'In a Van',
6 street2: 'Down by the river',
7 city: 'Denver',
8 state: 'CO',
9 zip: 80202
10 }
11 ];

./app/mirage/conﬁg.js
1 export default function() {
2
3 this.get('/companyAddresses', 'company-addresses');
4
5 }

2 this.timing = 2000;
3
5
6 }

./app/templates/loading.hbs
1 <div class="loading-page">
2 {{md-loader}}
3 </div>

./app/templates/loading.hbs
2 {{md-loader}}

$ ember generate component
subscribe-form

2 <div class="feature-content row">
3 <div class="col m6">
9 {{/link-to}}
10 </div>
11 </div>
12 <div class="subscribe-container col m6">
13 {{subscribe-form model=model}}
14 </div>
15 </div>
16 </div>

13 {{subscribe-form model=model}}

$ ember generate
model email-subscription

./app/models/email-subscription.js
1 import DS from 'ember-data';
2
3 export default DS.Model.extend({
4 email: DS.attr('string'),
5 marketing: DS.attr('boolean', {
6 defaultValue: true
7 })
8 });

./app/models/email-subscription.js
5 marketing: DS.attr('boolean', {
6 defaultValue: true
7 })

./app/routes/index.js
2
3 export default Ember.Route.extend({
4 model() {
5 return this.get('store').createRecord('email-subscription');
6 }
7 });

./app/routes/index.js
5 return this.get(‘store')
.createRecord('email-subscription');

./app/templates/components/subscribe-form.hbs
1 {{#md-card title=title}}
2 {{#if saved}}
3 {{#md-card-content}}
4 {{t 'subscribe.successMessage' email=model.email}}
6 {{else}}
7 {{#md-card-content}}
8 {{md-input value=model.email label=(t 'subscribe.email.label')
9 type='email' validate=true}}
10 {{md-check checked=model.marketing
11 name=(t 'subscribe.marketing.label')}}
12 {{#if saving}}
13 {{md-loader}}
14 {{/if}}
16 {{#md-card-action}}
17 <button {{action 'subscribe'}}>
18 {{t 'subscribe.submit'}}
19 </button>
20 {{/md-card-action}}
21 {{/if}}
22 {{/md-card}}

8 {{md-input value=model.email
label=(t subscribe.email.label')
9 type='email' validate=true}}

10 {{md-check checked=model.marketing
11 name=(t 'subscribe.marketing.label')}}

17 <button {{action 'subscribe'}}>
18 {{t 'subscribe.submit'}}
19 </button>

./app/components/subscribe-form.js
2
3 export default Ember.Component.extend({
4 i18n: Ember.inject.service('i18n'),
5 title: Ember.computed('saved', function() {
6 if (this.get('saved')) {
7 return this.get('i18n').t('subscribe.successHeader');
8 } else {
9 return this.get('i18n').t('subscribe.header');
10 }
11 }),
12 saved: false,
13 actions: {
14 subscribe() {
15 this.set('saving', true);
16 this.get('model').save().then(() => {
17 this.set('saving', false);
18 this.set('saved', true);
19 }, () => {
20 //error handling here
21 });
22 }
23 }
24 });

5 title: Ember.computed('saved', function() {
6 if (this.get('saved')) {
7 return this.get('i18n').t('subscribe.successHeader');
8 } else {
9 return this.get('i18n').t('subscribe.header');
10 }
11 }),

13 actions: {
14 subscribe() {
15 this.set('saving', true);
16 this.get('model').save().then(() => {
17 this.set('saving', false);
18 this.set('saved', true);
19 }, () => {
20 //error handling here
21 });
22 }
23 }

3
5
6 this.post('/emailSubscriptions',
7 'email-subscriptions');
8 }

6 this.post('/emailSubscriptions',
7 'email-subscriptions');

./tests/integration/components/subscribe-form-test.js
1 test('it renders', function(assert) {
2 assert.expect(3);
3
4 this.render(hbs`{{subscribe-form}}`);
5
6 assert.equal(
7 this.$('.card-title').text().trim(),
8 'Subscribe for updates on the stand.'
9 );
10
11 assert.equal(
12 this.$('.input-field label').text().trim(),
13 'Please enter your email address.'
14 );
15
16 assert.equal(
17 this.$('.materialize-checkbox label').text().trim(),
18 'Yes I would like to receive marketing material from Bluth sponsors.
19 '
20 );
21
22 });

./tests/acceptance/index-test.hbs
1 test('subscribe for updates', function(assert) {
2 visit('/');
3
4 fillIn(
5 '.subscribe-container .input-field input',
6 'veep@whitehouse.gov'
7 );
8 click('.card-action button');
9 andThen(() => {
10 // stays on index
12
13 assert.equal(
14 find('.subscribe-container .card-title').text().trim(),
15 'Thanks for signing up.'
16 );
17 assert.equal(
18 find('.card p').text().trim(),
19 'We'll send all of our updates to veep@whitehouse.gov.'
20 );
21 });
22
23 });

• https://github.com/Ibotta/dsw-2015-ember-demo

Building a Single Page Application using Ember.js ... for fun and profit

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