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RxJS + Angular 2 with 14 different Rx operators all chained together
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| SystemJS.config({ | |
| transpiler: "typescript", | |
| typescriptOptions: { | |
| "experimentalDecorators": true, | |
| "emitDecoratorMetadata": true | |
| }, | |
| map: { | |
| "rxjs": "https://npmcdn.com/rxjs", | |
| "angular2": "https://npmcdn.com/angular2", | |
| "@ngrx": "https://npmcdn.com/@ngrx", | |
| "typescript": "https://npmcdn.com/typescript/lib/typescript.js" | |
| }, | |
| packages: { | |
| "rxjs": { "defaultExtension": "js" }, | |
| "angular2": { "defaultExtension": "js" }, | |
| "@ngrx/store":{ | |
| "main":"dist/index.js" | |
| }, | |
| "src": { "defaultExtension": "ts" }, | |
| "build": { "defaultExtension": "ts" } | |
| } | |
| }); | |
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| <!DOCTYPE html> | |
| <html lang="en"> | |
| <head> | |
| <meta charset="UTF-8"> | |
| <title>Angular 2 App</title> | |
| <script src="https://npmcdn.com/angular2/bundles/angular2-polyfills.js"></script> | |
| <script src="https://npmcdn.com/systemjs/dist/system.js"></script> | |
| </head> | |
| <body> | |
| <app></app> | |
| <h2>Click one or more balls then click anywhere in the white box to move them</h2> | |
| <script src="config.js"></script> | |
| <script>System.import('src/main');</script> | |
| </body> | |
| </html> |
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| import {Component, DynamicComponentLoader, ElementRef} from 'angular2/core'; | |
| import {Ball} from './components/ball.component'; | |
| import {Observable} from 'rxjs/Observable'; | |
| import 'rxjs/add/operator/map'; | |
| import 'rxjs/add/operator/take'; | |
| import 'rxjs/add/operator/do'; | |
| import 'rxjs/add/operator/switchMap'; | |
| import 'rxjs/add/operator/startWith'; | |
| import 'rxjs/add/operator/withLatestFrom'; | |
| import 'rxjs/add/operator/mergeMap'; | |
| import 'rxjs/add/operator/concatAll'; | |
| import 'rxjs/add/operator/delay'; | |
| import 'rxjs/add/operator/buffer'; | |
| import 'rxjs/add/observable/merge'; | |
| import 'rxjs/add/observable/interval'; | |
| import 'rxjs/add/observable/fromPromise'; | |
| import 'rxjs/add/operator/share'; | |
| import {Subject} from 'rxjs/Subject'; | |
| @Component({ | |
| selector: 'app', | |
| directives: [Ball], | |
| template: ` | |
| <style> | |
| .container{ | |
| border: 10px solid black; | |
| width: 200px; | |
| height: 200px; | |
| } | |
| </style> | |
| <div class="container" | |
| (click)="container$.next($event)" | |
| > | |
| <div #container></div> | |
| </div> | |
| ` | |
| }) | |
| export class App { | |
| container$ = new Subject(); | |
| constructor(private _loader:DynamicComponentLoader, | |
| private _ref:ElementRef) { | |
| } | |
| ngOnInit() { | |
| const loadBall$ = Observable.interval(500) | |
| .take(20) | |
| .switchMap(()=> Observable | |
| .fromPromise(this._loader.loadIntoLocation(Ball, this._ref, 'container')), | |
| (_, {instance:ball})=> ball) | |
| .share(); | |
| const placeBall$ = loadBall$ | |
| .do((ball:Ball) => { | |
| ball.transform = `translateX(85px) translateY(85px)`; | |
| }); | |
| const initFormat$ = placeBall$ | |
| .delay(10) | |
| .map(ball => { | |
| return { | |
| ball, | |
| transform: `translateX(${Math.random() * 180}px) translateY(${Math.random() * 180}px)`, | |
| duration: `.25s` | |
| } | |
| }); | |
| const select$ = loadBall$ | |
| .mergeMap((ball:Ball) => ball.select) | |
| const buffer$ = select$.buffer(this.container$) | |
| .concatAll() | |
| .withLatestFrom(this.container$, | |
| ({ball, event:ballEvent}, containerEvent)=>( | |
| {ball, ballEvent, containerEvent} | |
| ) | |
| ); | |
| const bufferFormat$ = buffer$ | |
| .map(({ball, ballEvent, containerEvent})=> { | |
| const {clientX:x, clientY:y} = containerEvent; | |
| const {offsetLeft:left, offsetTop:top, offsetWidth:w, offsetHeight:h} = ballEvent.target; | |
| const targetX = x - left - w / 2; | |
| const targetY = y - top - h / 2; | |
| return { | |
| ball, | |
| transform: `translateX(${targetX}px) translateY(${targetY}px)`, | |
| duration: `${Math.random() + .5}s` | |
| } | |
| }); | |
| Observable.merge( | |
| initFormat$, | |
| bufferFormat$ | |
| ) | |
| .subscribe(({ball, transform, duration})=> { | |
| Object.assign(ball, {transform, duration}); | |
| }) | |
| } | |
| } |
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| import {Component, Input, EventEmitter, Output} from 'angular2/core'; | |
| @Component({ | |
| selector: 'ball', | |
| template: ` | |
| <style> | |
| .ball{ | |
| border: 3px solid black; | |
| position: absolute; | |
| border-radius: 50%; | |
| } | |
| </style> | |
| <div | |
| class="ball" | |
| [style.transform]="transform" | |
| [style.transition-duration]="duration" | |
| [style.width]="width" | |
| [style.height]="height" | |
| [style.left]="left" | |
| [style.top]="top" | |
| (click)="onClick($event)" | |
| [style.background-color]="randomColor" | |
| > | |
| </div> | |
| ` | |
| }) | |
| export class Ball { | |
| randomColor = '#'+Math.floor(Math.random()*16777215).toString(16); | |
| @Input() transform; | |
| @Input() duration; | |
| @Input() left = 20 + "px"; | |
| @Input() top = 20 + "px"; | |
| @Input() width = 20 + "px"; | |
| @Input() height = 20 + "px"; | |
| @Output() select = new EventEmitter(); | |
| onClick($event) { | |
| $event.preventDefault(); | |
| $event.stopPropagation(); | |
| this.select.emit({ball:this, event:$event}) | |
| } | |
| } |
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| import {bootstrap} from 'angular2/platform/browser'; | |
| import {App} from './app'; | |
| bootstrap(App) | |
| .catch(console.log.bind(console)); | |
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