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Сергей БольщиковWix
Angular Components: все уже за, а вы еще нет?
Quick exerciseCategory #1
Who is writing in Angular 1.x?
3
Quick exerciseCategory #1
Who is writing in Angular 1.x?
Category #2
Who is writing in Angular 2?
4
Quick exerciseCategory #1
Who is writing in Angular 1.x?
Category #2
Who is writing in Angular 2?
Who is writing in React?
Category #3
5
You will learn todayCategory #1
Who is writing in Angular 1.x?
Category #2
Who is writing in Angular 2?
Who is writing in React?
Category #3
6
● Current problems● Components
architecture● Components are
essentials for Angular 2● Components
architecture● Missing components test
kit
● Current problems● Components
architecture● Cleaner code● Components in Angular
1.x ● Components test kit
● You know that components are great
● Learn to test components
● Missing components test kit
Sergey BolshchikovDeveloper Advocate @ WixFather of YGFL ConferenceMaintainer of js-must-watch
7
github.com/bolshchikov
@bolshchikov
A bit about myself
What are the problems?How can we solve them with components?
Can they make our code better?How Angular Components solve them?
You Are Here
Agenda8
And it all starts from the...
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- Pearl Buck
“ “10
If you want to understand today,You have to search yesterday.
It’s all history
Jan, 2016
Aug, 2013
May, 2013
Oct, 2011
Feb, 2011
Oct, 2010
Components Model
Web Component
s Presentatio
nAngularDirectives
React
AngularComponent
sEmber Component
s
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01 / Problems
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We almost don’t write code,
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We almost don’t write code,
We maintain it.
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Maintain the soup ofservices, controllers, templates, directives, factories… is freaking
hard
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Just for you to visualize what I am talking about
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ctrl1
s1
d1
с1 с2
ctrl2
s2 s3 s4
d2
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ctrl1
s1
d1
с1 с2 с3
ctrl2 ctrl3
s2 s3 s4 s5 s6
d2 d3
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ctrl1
s1
d1
с1 с2 с3 с4 с5
ctrl2 ctrl3 ctrl4 ctrl5
s2 s3 s4 s5 s6 s7 s8 s9 10 11
d2 d3 d4 d5 d6 d7
ctrl6
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ctrl1
s1
d1
с1 с2 с3 с4 с5
ctrl2 ctrl3 ctrl4 ctrl5
s2 s3 s4 s5 s6 s7 s8 s9 10 11
d2 d3 d4 d5 d6 d7
ctrl6
This is not a fake, this is real app
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Ahh, and one more thing -
We need to test all of it.
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02 / Can we do better?
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Imageapp
My Images
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My Images
25
My Images
app 26
My Images
app
media item
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My Images
app
media item
preview
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The component treeapp
media item preview
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1..n
Clear APIapp
media item preview
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1..n
item item
Clear APIapp
media item preview
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1..n
item item
on-remove()on-prev()on-next()
Clear APIapp
media item preview
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1..n
item item
on-remove()on-prev()on-next()
Smart component
Dumb component Dumb component
It scales33
03 / Angular Components
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@Component({
selector: 'hero-list',
templateUrl: 'app/hero-list.component.html',
directives: [HeroDetailComponent],
providers: [HeroService]
})
Cornerstone @ ng2 35
Components are introduced in Angular
1.5 or with polyfill even before
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angular
.module('totallyDifferentAngularAppInterna
l')
.directive('test', () => ({
template: '<div></div>',
controller: Test,
controllerAs: 'test',
scope: {
name: '='
},
bindToController: true,
restrict: 'E'
}));
Directive vs. Component 37
angular
.module('totallyDifferentAngularAppInterna
l')
.component('test', {
template: `<div></div>`,
controller: Test,
bindings: {
name: '='
}
});
class Test {
$onInit() { // initialization code for constructor }
$onDestroy() {}
$postLink() {}
}
angular
.module('totallyDifferentAngularAppInternal')
.component('test', {
template: `<div></div>`,
controller: Test,
bindings: {
name: '='
}
});
Lifecycle hooks 38
Now let’s talk about testing.
Scaling is hard without it.
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Are you doing TDD?
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Ahh, OK.How about just testing?
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Tests’ typesTest Type Speed Amount Check Coupling
Unit(Karma) Fast Many Logic Isolated
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Tests’ typesTest Type Speed Amount Check Coupling
Unit(Karma) Fast Many Logic Isolated
Integration(Protractor) Slow Few UI Very
Coupled
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Missing something?
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Tests’ typesTest Type Speed Amount Check Coupling
Unit(Karma) Fast Many Logic Isolated
Fast Many Logic + UI Some
Integration(Protractor) Slow Few UI Very
Coupled
45
Tests’ typesTest Type Speed Amount Check Coupling
Unit(Karma) Fast Many Logic Isolated
Component(Karma) Fast Many Logic + UI Some
Integration(Protractor) Slow Few UI Very
Coupled
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Meet component test kit!
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04 / Show us code
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Component Test
Usual tests
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Component TestDriver
Adding driver
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Component TestDriver
SubComponent
SubComponent
Component and its children
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Component TestDriver
SubComponent Driver
DriverSubComponent
Driver and its children
This is where you are going to present your final words.This slide is not meant to have a lot of text.
Problems / Solutions53
Maintenance
Scaling
Testing
Clear Input/Output
Components tree
Component Test Kit
This is where you are going to present your final words.This slide is not meant to have a lot of text.Exciting news!We are hiring in Kiev!http://bolshchikov.net
Sergey Bolshchikov
github.com/bolshchikov@[email protected]
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This is where you are going to present your final words.This slide is not meant to have a lot of text.Thank You!Any Questions?http://bolshchikov.net
Sergey Bolshchikov
github.com/bolshchikov@[email protected]
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