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| <!DOCTYPE html> | |
| <html lang="en"> | |
| <head> | |
| <meta charset="UTF-8"> | |
| <title>RxJSCraft</title> | |
| <script src="https://npmcdn.com/[email protected]/dist/system.js"></script> | |
| <script src="https://npmcdn.com/[email protected]/lib/typescript.js"></script> | |
| <script src="https://npmcdn.com/[email protected]/bundles/Rx.js"></script> | |
| <style> | |
| .red-ball{ | |
| position: absolute; | |
| background-color: red; | |
| border-radius: 50%; | |
| width:20px; | |
| height:20px; | |
| } | |
| .container{ | |
| border: 10px solid black; | |
| width: 200px; | |
| height: 200px; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <div class="container"> | |
| <div class="red-ball"></div> | |
| <div class="red-ball"></div> | |
| <div class="red-ball"></div> | |
| <div class="red-ball"></div> | |
| <div class="red-ball"></div> | |
| <div class="red-ball"></div> | |
| <div class="red-ball"></div> | |
| <div class="red-ball"></div> | |
| <div class="red-ball"></div> | |
| <div class="red-ball"></div> | |
| </div> | |
| <script> | |
| SystemJS.config({ | |
| transpiler: "typescript", | |
| typescriptOptions: { | |
| emitDecoratorMetadata: true | |
| }, | |
| packages: { | |
| "src": { | |
| "main": "app", | |
| "defaultExtension": "ts" | |
| } | |
| } | |
| }); | |
| System.import('src'); | |
| </script> | |
| </body> | |
| </html> |
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| import {Observable} from "rxjs/Rx"; | |
| const container = document.querySelector('.container'); | |
| const redBalls = document.querySelectorAll('.red-ball'); | |
| const redBallsArray = Array.from(redBalls); | |
| const redBalls$ = Observable.from(redBallsArray); | |
| //randomly position the balls | |
| redBallsArray.forEach((ball:HTMLElement) => { | |
| ball.style.top = Math.random() * 200 + "px"; | |
| ball.style.left = Math.random() * 200 + "px"; | |
| }); | |
| const redBallClick$ = Observable.fromEvent(redBalls, 'click') | |
| .do(event => event.stopPropagation()); | |
| const containerClick$ = Observable.fromEvent(container, 'click') | |
| .do(event => event.stopPropagation()); | |
| const changeElementColor = color => element => { | |
| element.style.backgroundColor = color; | |
| }; | |
| redBallClick$ | |
| .pluck('target') | |
| .subscribe(changeElementColor("green")); | |
| containerClick$ | |
| .switchMapTo(redBalls$) | |
| .subscribe(changeElementColor("red")); | |
| redBallClick$ | |
| .pluck("target") | |
| .window(containerClick$) | |
| .mergeMap(windowed => windowed.toArray()) | |
| .switchMap(x => Observable.from(new Set(x))) | |
| .withLatestFrom(containerClick$) | |
| .subscribe(([ball, event])=>{ | |
| console.log(ball) | |
| const {clientX:x, clientY:y} = event; | |
| const {offsetLeft:left, offsetTop:top, offsetWidth:w, offsetHeight:h} = ball; | |
| const targetX = x - left - w/2; | |
| const targetY = y - top - h/2; | |
| ball.style['transition-duration'] = "1s"; | |
| ball.style.transform = `translateX(${targetX}px) translateY(${targetY}px)`; | |
| } | |
| }); | |
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