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<!DOCTYPE html> | |
<html lang="en"> | |
<head> | |
<meta charset="UTF-8"> | |
<title>RxJSCraft</title> | |
<script src="https://npmcdn.com/systemjs@0.19.24/dist/system.js"></script> | |
<script src="https://npmcdn.com/typescript@1.8.9/lib/typescript.js"></script> | |
<script src="https://npmcdn.com/rxjs@5.0.0-beta.4/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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