Web Components with Angular Elements: Beyond the Basics @ngconf 2019

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1. @ManfredSteyer Web Components with Angular Elements: Beyond the Basics Manfred Steyer SOFTWAREarchitekt.at ManfredSteyer
2. @ManfredSteyer
3. @ManfredSteyer [Igor Minar, Angular Connect 2018 Keynote]
4. @ManfredSteyer
5. @ManfredSteyer Angular Elements
6. @ManfredSteyer Custom Elements: Framework independent components
7. @ManfredSteyer Possibilities Component Libraries Enriching existing Apps CMS Integration Dynamic Loading
8. @ManfredSteyer Contents • Basics (just one slide) • Dynamically adding elements • Lazy loading elements • External elements • Bundle Size
9. @ManfredSteyer About me … • Manfred Steyer SOFTWAREarchitekt.at • Angular Trainings and Consultancy • Google Developer Expert (GDE) • Angular Trusted Collaborator Page ▪ 9 Manfred Steyer Public: Vienna, Munich, Frankfurt In-House: Everywhere in Europe http://www.softwarearchitekt.at/workshops
10. @ManfredSteyer 1) Basics
11. @ManfredSteyer Angular Elements Wrap Angular Components: createCustomElement(…) Register it with browser: customElements.define(…)
12. @ManfredSteyer 2) Dynamic Elements
13. @ManfredSteyer Adding Custom Elements dynamically const tile = document.createElement('dashboard-tile');
14. @ManfredSteyer Adding Custom Elements dynamically const tile = document.createElement('dashboard-tile‘); tile['prop'] = 123; tile.setAttribute('class', 'col-lg-4 col-md-3 col-sm-2') tile.addEventListener([…])
15. @ManfredSteyer Adding Custom Elements dynamically const tile = document.createElement('dashboard-tile'); tile['prop'] = 123; tile.setAttribute('class', 'col-lg-4 col-md-3 col-sm-2') tile.addEventListener([…]) otherElement.appendChild(tile); Angular uses Domino to simulate document for SSR!
16. @ManfredSteyer DEMO
17. @ManfredSteyer 3) Lazy Loading
18. @ManfredSteyer 2 Steps for Lazy Elements Register module in angular.json Load with with NgModuleFactoryLoader
19. @ManfredSteyer Register in angular.json "lazyModules": [ "[…]/lazy-dashboard-tile.module" ],
20. @ManfredSteyer Loading your module @Injectable({ providedIn: 'root' }) export class LazyDashboardTileService { }
21. @ManfredSteyer Loading your module @Injectable({ providedIn: 'root' }) export class LazyDashboardTileService { constructor( private loader: NgModuleFactoryLoader, private injector: Injector ) {} }
22. @ManfredSteyer Loading your module @Injectable({ providedIn: 'root' }) export class LazyDashboardTileService { constructor( private loader: NgModuleFactoryLoader, private injector: Injector ) {} load(): Promise<void> { const path = '[…]/lazy-dashboard-tile.module‘; […] } }
23. @ManfredSteyer Loading your module @Injectable({ providedIn: 'root' }) export class LazyDashboardTileService { constructor( private loader: NgModuleFactoryLoader, private injector: Injector ) {} load(): Promise<void> { const path = '[…]/lazy-dashboard-tile.module'; return this.loader.load(path).then(moduleFactory => { }); } }
24. @ManfredSteyer Loading your module @Injectable({ providedIn: 'root' }) export class LazyDashboardTileService { constructor( private loader: NgModuleFactoryLoader, private injector: Injector ) {} load(): Promise<void> { const path = '[…]/lazy-dashboard-tile.module'; return this.loader.load(path).then(moduleFactory => { moduleFactory.create(this.injector); }); } }
25. @ManfredSteyer DEMO
26. @ManfredSteyer 4) External Elements
27. @ManfredSteyer Project A Custom Element Custom Element Bundle Project B
28. @ManfredSteyer Create application for Custom Elements Compile application to self contained bundle Load bundle into consumer 3 Steps
29. @ManfredSteyer Compile to self-contained bundle
30. @ManfredSteyer ng add ngx-build-plus
31. @ManfredSteyer One of the simplest bundle loaders … const script = document.createElement('script'); script.src = 'assets/external-dashboard-tile.bundle.js'; document.body.appendChild(script);
32. @ManfredSteyer DEMO
33. @ManfredSteyer 5) Bundle Size
34. @ManfredSteyer Bundles Custom Element 1 Custom Element 2 Custom Element 3 Libraries: Angular, RxJS, … Libraries: Angular, RxJS, …
35. @ManfredSteyer Angular Elements + Ivy Custom Element 1 Custom Element 2 Custom Element 3
36. @ManfredSteyer Where Ivy can help ✓ UI-based Widgets ✓ Libraries
37. @ManfredSteyer Sharing Libs Custom Element 1 Custom Element 2 Custom Element 3 Libraries: Angular, RxJS, … Drawbacks: Complexity, non-default build, …
38. @ManfredSteyer Summary Reuse with other technologies Dynamically Adding Lazy Loading External Elements Ivy for UI-based Code Sharing Dependencies
39. @ManfredSteyer Sometimes, all we want is a greasy pizza!
40. @ManfredSteyer Blog > SOFTWAREarchitekt.at • Angular Elements, Part I: A Dynamic Dashboard In Four Steps With Web Components […] • Angular Elements, Part V: Your Options For Building Angular Elements With The CLI
41. @ManfredSteyer Workshop: Tomorrow A Deep Look at Angular Elements With live coding and exercises for you on StackBlitz Thu, May 2:30 pm - 4:30 pm
42. @ManfredSteyer Contact and Downloads [mail] manfred.steyer@SOFTWAREarchitekt.at [web] SOFTWAREarchitekt.at [twitter] ManfredSteyer d http://softwarearchitekt.at/workshops Slides & Examples