Integrated Web Stack with Angular 2

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ngular with Minko Gechev github.com/mgechev twitter.com/mgechev blog.mgechev.com Integrated Web Stack with

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agenda

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What is Angular 2

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Mobile • Web apps • Ionic 2 • NativeScript • React Native

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Desktop • Web apps • Electron

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Angular 2 is platform agnostic

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core (zones, di, abstractions, etc.)

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renderer core (zones, di, abstractions, etc.)

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compiler renderer core (zones, di, abstractions, etc.)

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http compiler renderer core (zones, di, abstractions, etc.)

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forms http compiler renderer core (zones, di, abstractions, etc.)

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forms http compiler renderer core (zones, di, abstractions, etc.) router

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forms http compiler renderer core (zones, di, abstractions, etc.) router i18n

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forms http compiler renderer core (zones, di, abstractions, etc.) router i18n ngUpgrade

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forms http compiler renderer core (zones, di, abstractions, etc.) router i18n ngUpgrade animations

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PWA forms http compiler renderer core (zones, di, abstractions, etc.) router i18n ngUpgrade animations

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Universal PWA forms http compiler renderer core (zones, di, abstractions, etc.) router i18n ngUpgrade animations

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material 2 Universal PWA forms http compiler renderer core (zones, di, abstractions, etc.) router i18n ngUpgrade animations

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CLI material 2 Universal PWA forms http compiler renderer core (zones, di, abstractions, etc.) router i18n ngUpgrade animations

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language services CLI material 2 Universal PWA forms http compiler renderer core (zones, di, abstractions, etc.) router i18n ngUpgrade animations

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angularﬁre2 language services CLI material 2 Universal PWA forms http compiler renderer core (zones, di, abstractions, etc.) router i18n ngUpgrade animations

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angularﬁre2 language services CLI material 2 Universal PWA forms http compiler renderer core (zones, di, abstractions, etc.) router i18n ngUpgrade animations

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Angular 2’s Core

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Core • Zone.js • Ultrafast Change Detection • Dependency Injection • View Encapsulation

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“A Zone is an execution context that persists across async tasks. You can think of it as thread-local storage for JavaScript VMs.”

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“A Zone is an execution context that persists across async tasks. You can think of it as thread-local storage for JavaScript VMs.”

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@Component(...) class SimpleComponent { getData() { fetch('https://example.com/data.json') .then(response => response.json()) .then(data => { this.users = data; this.cd.detectChanges(); }); } } no-zones.js

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with-zones.js @Component(...) class SimpleComponent { getData() { fetch('https://example.com/data.json') .then(response => response.json()) .then(data => this.users = data); } }

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in-zones.js const old = Promise.prototype.then; Promise.prototype.then = function () { old.apply(Promise.prototype, arguments); this.rootCD.detectChanges(); };

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Renderer

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“A set of abstract operations which can be specialized for a specific platform”

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“A set of abstract operations which can be specialized for a specific platform”

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Client Server

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Client Server

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Client Server GET / GET * loop

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Client Server GET / GET * loop Running JavaScript

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Client Server GET / GET * loop GET * loop

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Client Server GET / GET * loop GET * loop

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server-side rendering

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Client Server

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Client Server

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Client Server GET /

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Client Server GET / Running JavaScript

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Client Server GET / GET * loop

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Client Server GET / GET * loop Running JavaScript

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Client Server GET / GET * loop

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“NativeScript 2.0 truly native mobile apps”

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“NativeScript 2.0 truly native mobile apps”

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why not…

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Compiler

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“Compiles your templates to JavaScript calls to the renderer”

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template.html

Howdy! Here's a list

...

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compiled.js ... var parentRenderNode = renderer .createViewRoot(declarationAppElement.nativeElement); _el_0 = renderer .createElement(parentRenderNode,'p',debug(0,0,0)); _text_1 = renderer .createText(_el_0,'\n Howdy! Here\'s a list',debug(1,0,3)); _text_2 = renderer .createText(parentRenderNode,'\n\n',debug(2,3,4)); _el_3 = renderer .createElement(parentRenderNode,'form',debug(3,5,0)); ...

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Compiler works run-time and build time

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Single instance of the renderer

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Optimizations • Payload reduction (tree-shaking) • Pre-compilation • Ultra-fast change detection • WebWorkers

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angular/mobile-toolkit

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Progressive enhancement for web applications

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mobile-toolkit • Offline access to static content • Notifications for new versions • Efficient download of deltas • Support of push notifications • AppShell

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Service Workers and AppCache

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AppCache Service Workers AppCache Service Workers

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AppCache Service Workers = ~91.8%

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Development experience

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Typical JavaScript experience

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Angular is… • Built with TypeScript • Compile-time type checking • Great IDE/text editors support • Analyzable templates

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Type-checking and IntelliSense in templates

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Already supported by some IDEs

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Still immature…

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Using style guide in your project

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Enforcing common style

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• Fork the ofﬁcial style guide • Modify the styles according to your needs • Introduce the style guide to your team • Verify that each individual code change follows it Enforcing common style

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Code review process

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manual boring error-prone

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codelyzer

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“codelyzer is a project which aims to enforce common style and verify correctness of your program”

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Where to start?

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angular-cli

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ng new hello-world

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angular-cli: • Quick bootstrap of projects • Generating: • Components • Services • Directives • Pipes • Support for ofﬂine apps • many others…

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angular2-seed

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angular2-seed • TypeScript transpilation • Statically typed dev and prod builds • Out of the box unit-testing • Test coverage • e2e testing with protractor • Static code analyzer

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Resources: • angular.io • github.com/angular/angular • github.com/angular/mobile-toolkit • github.com/angular/angular-cli • github.com/mgechev/angular2-seed

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Thank you! github.com/mgechev twitter.com/mgechev blog.mgechev.com