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Angular 2 e o futuro do desenvolvimento Front-end
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Ciro Nunes
September 19, 2015
Technology
2
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Angular 2 e o futuro do desenvolvimento Front-end
Ciro Nunes
September 19, 2015
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Transcript
None
Directives Separation of Concerns (MVC) Data-binding Dependency Injection
None
––≠
ngEurope, Outubro, 2014 Versão 2.0 anunciada oficialmente!
Angular 2 e o futuro do desenvolvimento Front-end
Angular 2 está em Alpha Preview Angular 1.x ainda é
o melhor para produção
30 min
30 min Slides: cnunes.com/angular2-future
@cironunesdev
Belo Horizonte - MG
None
None
None
Angular 2 e o futuro do desenvolvimento Front-end
1. Por que uma nova versão? 2. O que a
nova versão terá de melhor? 3. Como me preparar para o futuro?
1. Por que uma nova versão?
Decisões de design equivocadas & Evolução da plataforma
$scope e $digest cycle Directive Definition Object Global Dependency Injector
Decisões de design
Web Components ES2015/2016 Web Workers Mobile apps Offline Evolução da
plataforma
Incremental vs Big Bang
None
2. O que a nova versão vai ter de melhor?
Padrões web Template Syntax Change detection
Padrões web
Padrões web Directives and transclusion
Web Components and content projection Padrões web Directives and transclusion
Title Lorem ipsum dolor sit amet
http://cnun.es/angular1-transclusion
<my-card title="This is the title"> <p>This is the content</p> </my-card>
<my-card title="This is the title"> <p>This is the content</p> </my-card>
Property binding
<my-card title="This is the title"> <p>This is the content</p> </my-card>
Property binding Transclusion
<div class="component"> <h1>{{ title }}</h1> <div ng-transclude></div> </div>
<div class="component"> <h1>{{ title }}</h1> <div ng-transclude></div> </div> Property binding
<div class="component"> <h1>{{ title }}</h1> <div ng-transclude></div> </div> Transclusion Property
binding
app.directive('myCard', function() { return { templateUrl: 'my-card.html', scope: { title:
'@' }, transclude: true }; });
app.directive('myCard', function() { return { templateUrl: 'my-card.html', scope: { title:
'@' }, transclude: true }; }); Property binding
app.directive('myCard', function() { return { templateUrl: 'my-card.html', scope: { title:
'@' }, transclude: true }; }); Property binding Transclusion
http://cnun.es/angular2-content-projection
<my-card [title]="'This is title'"> <p>This is the content</p> </my-card>
<my-card [title]="'This is title'"> <p>This is the content</p> </my-card> Property
binding
<my-card [title]="'This is title'"> <p>This is the content</p> </my-card> Property
binding Content projection
<div class="my-card"> <h1>{{ title }}</h1> <content></content> </div>
<div class="my-card"> <h1>{{ title }}</h1> <content></content> </div> Property binding
<div class="my-card"> <h1>{{ title }}</h1> <content></content> </div> Content projection Property
binding
import { Component, View, ViewEncapsulation } from 'angular2/angular2'; @Component({ selector:
'my-card', properties: ['title'] }) @View({ encapsulation: ViewEncapsulation.Native templateUrl: 'my-card.html' }) class MyComponent {}
import { Component, View, ViewEncapsulation } from 'angular2/angular2'; @Component({ selector:
'my-card', properties: ['title'] }) @View({ encapsulation: ViewEncapsulation.Native templateUrl: 'my-card.html' }) class MyComponent {} Property binding
import { Component, View, ViewEncapsulation } from 'angular2/angular2'; @Component({ selector:
'my-card', properties: ['title'] }) @View({ encapsulation: ViewEncapsulation.Native templateUrl: 'my-card.html' }) class MyComponent {} Property binding Content projection
Padrões web
Encapsulamento de componentes Padrões web
Encapsulamento de componentes Padrões web Shadow DOM
Encapsulamento de componentes Padrões web Shadow DOM ES2016/2017 (TypeScript): optional
Template Syntax http://cnun.es/angular2-template
<my-card title="{{ title }}" visible="visible" remove="onRemove()"> </my-card>
<my-card title="{{ title }}" visible="visible" remove="onRemove()"> </my-card> Entrada
<my-card title="{{ title }}" visible="visible" remove="onRemove()"> </my-card> Entrada Entrada
<my-card title="{{ title }}" visible="visible" remove="onRemove()"> </my-card> Entrada Saída Entrada
<my-card title="{{ title }}" visible="visible" remove="onRemove()"> </my-card> Entrada Saída Entrada
scope: { title: '@', visible: '=', remove: '&' }
<my-card [title]="title" [visible]="visible" (remove)="onRemove()"> </my-card>
<my-card [title]="title" [visible]="visible" (remove)="onRemove()"> </my-card> Entrada
<my-card [title]="title" [visible]="visible" (remove)="onRemove()"> </my-card> Entrada Entrada
<my-card [title]="title" [visible]="visible" (remove)="onRemove()"> </my-card> Saída Entrada
Menos regras para memorizar HTML válido Sintaxe semântica Template syntax
Change detection
Cycling graphs Change detection
Cycling graphs Change detection Tree of components
None
http://victorsavkin.com/post/110170125256/change-detection-in-angular-2
Immutable objects http://victorsavkin.com/post/110170125256/change-detection-in-angular-2
Immutable objects http://victorsavkin.com/post/110170125256/change-detection-in-angular-2
Immutable objects http://victorsavkin.com/post/110170125256/change-detection-in-angular-2
Immutable objects @Component({ changeDetection:ON_PUSH }) http://victorsavkin.com/post/110170125256/change-detection-in-angular-2
Tree of components Change detection Mais rápido por natureza 3~5x
mais rápido Suporte a diferentes estratégias
3. Como me preparar para o futuro?
Aposte nos padrões web
Aposte nos padrões web
Comece a usar ES6 hoje
Comece a usar ES6 hoje
Comece a usar ES6 hoje
Siga guia de estilo do John Papa
None
Veja alguns apps em Angular 2
github.com/cironunes/cart2 github.com/cironunes/worst-player-award builtwithangular2.com/ Angular 2 apps
Angular 2
Plataforma de desenvolvimento para evergreen browsers Angular 2
Plataforma de desenvolvimento para evergreen browsers Angular 2 Change detection
até 8x mais rápido que na versão 1.x
Plataforma de desenvolvimento para evergreen browsers Angular 2 Change detection
até 8x mais rápido que na versão 1.x Suporte a Web Componentes e outros padrões
Plataforma de desenvolvimento para evergreen browsers Angular 2 Change detection
até 8x mais rápido que na versão 1.x Suporte a Web Componentes e outros padrões Sintaxe mais semântica e com menos regras
Perguntas? @cironunesdev