Maintainable Client Architecture w/ Micro-Apps and Angular Elements

# Example
https://github.com/manfredsteyer/angular-microapp

# Blog Article about this
https://www.softwarearchitekt.at/post/2018/05/04/microservice-clients-with-web-components-using-angular-elements-dreams-of-the-near-future.aspx

# Little but useful npm lib for building without webpack
https://www.npmjs.com/package/ngx-build-plus

Transcript

1. @ManfredSteyer Maintainable Client Architecture w/ Micro-Apps and Angular Elements Manfred Steyer SOFTWAREarchitekt.at ManfredSteyer
2. @ManfredSteyer About me… • Manfred Steyer • SOFTWAREarchitekt.at • Angular Trainings and Consultancy • Google Developer Expert (GDE) Page ▪ 2 Manfred Steyer Public: Vienna, München, Zürich In-House: everywhere http://www.angular-college.com/landing
3. @ManfredSteyer ✓ Commodore 64 ✓ 1982 ✓ ~ 1 MHz ✓ 64 KB RAM ✓ Disks with 170 KB
4. @ManfredSteyer Version with two cores ;-) Challenge: Resources!
5. @ManfredSteyer Challenges today: Complexity
6. @ManfredSteyer Coordination b/w teams
7. @ManfredSteyer Long Time Maintainability Maintain + Extend for 10 - 20 yrs
8. @ManfredSteyer There are milk products lasting longer than some JavaScript frameworks
9. @ManfredSteyer Contents 1) Micro Apps 2) Web Components 3) Implementation w/ Angular 4) DEMO
10. @ManfredSteyer 1) Micro Apps
11. @ManfredSteyer Idea System
12. @ManfredSteyer Idea µService µService µService
13. @ManfredSteyer Idea µApp µApp µApp
14. @ManfredSteyer Folie▪ 18 Pro Contra
15. @ManfredSteyer UI Composition w/ Hyperlinks µApp SPA µApp SPA µApp SPA
16. @ManfredSteyer
17. @ManfredSteyer
18. @ManfredSteyer
19. @ManfredSteyer µService Providing a (SPA based) Shell µApp µApp µApp Shell ✓ iframes ✓ Bootstrapping several SPAs ✓ Web Components
20. @ManfredSteyer 2) Web Components
21. @ManfredSteyer Framework independent Components
22. @ManfredSteyer Can be dynamically loaded into the browser!
23. @ManfredSteyer Umbrella Term for several Standards
24. @ManfredSteyer Custom Elements & Shadow DOM Just two of them …
25. @ManfredSteyer Custom Elements Own HTML-Element, e. g. <date-picker> Behaves like build-in ones Write w/ one framework; consume with other ones Can be polyfilled down to IE 11
26. @ManfredSteyer Examples <slider min="0" max="100"> … <customer-selector selected="selected()"> … <my-micro-app state="sharedState" message="handle(…)">…
27. @ManfredSteyer Shadow DOM Isolate CSS Parent cannot influence Component's layout Component cannot influence Parent or Siblings
28. @ManfredSteyer "Shady" DOM Emulation for older Browsers Parent can influence Component's layout Component cannot influence Parent or Siblings
29. @ManfredSteyer µService µApp3 µApp2 µApp1 Shell Web Components for Macro-Architecture Shared Widget Shared Widget Shared Widget Web Components for Micro-Architecture
30. @ManfredSteyer 3) Implementation with Angular
31. @ManfredSteyer Shadow DOM • Baked-in • Shady DOM • @Component({ encapsulation: ViewEncapsulation.Emulated }) • Default • Shadow DOM • @Component({ encapsulation: ViewEncapsulation.Native }) • Can be turned off: • @Component({ encapsulation: ViewEncapsulation.None })
32. @ManfredSteyer Custom Elements Angular Elements Wraps Angular Component Expose Custom Element
33. @ManfredSteyer MicroApp as Angular Elements @NgModule({ imports: [BrowserModule], declarations: [MicroAppComponent], bootstrap: [], entryComponents: [MicroAppComponent] }) export class AppModule { }
34. @ManfredSteyer MicroApp as Angular Elements @NgModule({ imports: [BrowserModule], declarations: [MicroAppComponent], bootstrap: [], entryComponents: [MicroAppComponent] }) export class AppModule { }
35. @ManfredSteyer MicroApp as Angular Elements @NgModule({ imports: [BrowserModule], declarations: [MicroAppComponent], bootstrap: [], entryComponents: [MicroAppComponent] }) export class AppModule { constructor(private injector: Injector) { } ngDoBootstrap() { } }
36. @ManfredSteyer MicroApp as Angular Elements @NgModule({ imports: [BrowserModule], declarations: [MicroAppComponent], bootstrap: [], entryComponents: [MicroAppComponent] }) export class AppModule { constructor(private injector: Injector) { } ngDoBootstrap() { const MicroAppElement = createCustomElement( MicroAppComponent, { injector: this.injector }); customElements.define('micro-app', MicroAppElement); } }
37. @ManfredSteyer Loading MicroApps <script src="micro-app.bundle.js"></script> <micro-app></micro-app>
38. @ManfredSteyer 4) DEMO
39. @ManfredSteyer Blog > SOFTWAREarchitekt.at • A Software Architect's Approach Towards Using Angular (And SPAs In General) For Microservices Aka Microfrontends • A Lightweight And Solid Approach Towards Micro Frontends (Micro Service Clients) With Angular And/Or Other Frameworks • Micro Apps With Web Components Using Angular Elements
40. @ManfredSteyer Conclusion Separate Deployment Less Coordination Mixing Technologies Shadow DOM & Angular Elements Macro vs. Macro Level
41. @ManfredSteyer Contact and Downloads [mail] manfred.steyer@SOFTWAREarchitekt.at [web] SOFTWAREarchitekt.at [twitter] ManfredSteyer d http://www.angular-college.com/landing Slides & Examples