The awesomeness of Angular 2

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The Awesomeness of Angular 2

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Ciro Nunes FRONT-END ENGINEER @cironunesdev / +cironunesdev / cironunes.com

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Belo Horizonte - MG

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The Awesomeness of Angular 2

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but before…

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The current state of Angular 1.x

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15k+ forks angular/angular.js 1.2k+ contributors 37k+ stars Angular 1.x

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1.4 New Router New I18n CommonJS support Better animation support Performance improvements

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Angular 2 ready 1.4 New Router New I18n CommonJS support Better animation support Performance improvements

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Angular 1.4 is the best Angular yet

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1.5 is coming soon

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The Awesomeness of Angular 2

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Why a brand new version?

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2009

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2015

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Reasons for a brand new version

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Evolving web Reasons for a brand new version

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Evolving web Reasons for a brand new version Focus

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The awesomeness of Angular 2

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Change detection The awesomeness of Angular 2

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Change detection The awesomeness of Angular 2 Beneﬁts of using ES6

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Change detection The awesomeness of Angular 2 Beneﬁts of using ES6 Template syntax

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Disclaimer Angular 2 is currently in Alpha Preview

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Change detection

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Performance issues

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Faster by nature Easier to reason about Trees

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Immutable objects

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Observable objects

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Conﬁgurable 3-10x faster Trees instead of cycling graphs Change detection http://victorsavkin.com/post/110170125256/change-detection-in-angular-2

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Beneﬁts from using ES6

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“Classes" Angular 1.x angular.module('myApp') .controller('MyComponent', function() { this.meaningOfLife = 42; });

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Classes Angular 2 class MyComponent { constructor() { this.meaningOfLife = 42; } }

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angular.module('myApp', ['myModule']); angular.module('myModule', []); Modules Angular 1

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Modules Angular 2 export class MyModule {} import {MyModule} from 'module';

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Directives Angular 1 angular.module('myApp') .directive('myComponent', function() { return { template: '

Meaning of life is {{ meaningOfLife }}

', bindToController: true, controller: function() { this.meaningOfLife = 42; } }; })

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Annotations (optional) @Component({ selector: 'my-component' }) @View({ template: `

The meaning of life is {{ meaningOfLife }}

` }) class MyComponent { constructor() { this.meaningOfLife = 42; } }

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Types (completely optional) @Component({ selector: 'my-component' }) @View({ template: `

The meaning of life is {{ meaningOfLife }}

` }) class MyComponent { meaningOfLife: number; constructor() { this.meaningOfLife = 42; } }

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Template syntax

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Data-binding

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Binding to components Angular 1

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Binding to components Angular 2

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Events

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Angular 1 expression or statement

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Angular 2 expression vs statement

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Toolable Power in the hands of the user Fewer rules to remember Template syntax Play nice with Web Components