Last thing to do is clean the score box and input, also auto foucs on input when click start.
const starters$ = Observable.merge(
start$.mapTo(1000),
half$.mapTo(500),
quarter$.mapTo(250)
); // Clear the score box input and focus on input
starters$.subscribe( () => {
document.querySelector('#score').innerHTML = "";
input.value = "";
input.focus();
})
--------------------------
const Observable = Rx.Observable;
const startButton = document.querySelector('#start');
const halfButton = document.querySelector('#half');
const quarterButton = document.querySelector('#quarter');
const stopButton = document.querySelector('#stop');
const resetButton = document.querySelector('#reset');
const input = document.querySelector('#input');
const start$ = Observable.fromEvent(startButton, 'click');
const half$ = Observable.fromEvent(halfButton, 'click');
const quarter$ = Observable.fromEvent(quarterButton, 'click');
const stop$ = Observable.fromEvent(stopButton, 'click');
const reset$ = Observable.fromEvent(resetButton, 'click');
const input$ = Observable.fromEvent(input, 'input')
.map(event => event.target.value);
const data = {count:0};
const inc = (acc)=> ({count: acc.count + 1});
const reset = (acc)=> data;
const starters$ = Observable.merge(
start$.mapTo(1000),
half$.mapTo(500),
quarter$.mapTo(250)
);
// Clear the score box input and focus on input
starters$.subscribe( () => {
document.querySelector('#score').innerHTML = "";
input.value = "";
input.focus();
})
const intervalActions = (time)=> Observable.merge(
Observable.interval(time)
.takeUntil(stop$).mapTo(inc),
reset$.mapTo(reset)
);
const timer$ = starters$
.switchMap(intervalActions)
.startWith(data)
.scan((acc, curr)=> curr(acc))
const runningGame$ = timer$
.do((x)=> console.log(x))
.takeWhile((data)=> data.count <= 3)
.withLatestFrom(
input$.do((x)=> console.log(x)),
(timer, input)=> ({count: timer.count, text: input})
)
.share();
// To clean the input
runningGame$
.repeat()
.subscribe( (x) => input.value = "");
runningGame$
.filter((data)=> data.count === parseInt(data.text))
.reduce((acc, curr)=> acc + 1, 0)
.repeat()
.subscribe(
(x)=> document.querySelector('#score').innerHTML = `
${x}
`,
err=> console.log(err),
()=> console.log('complete')
);
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width">
<script src="https://npmcdn.com/@reactivex/rxjs@5.0.0-beta.1/dist/global/Rx.umd.js"></script>
<title>JS Bin</title>
</head>
<body> <button id="start">Start</button>
<button id="half">Half</button>
<button id="quarter">Quarter</button>
<button id="stop">Stop</button>
<button id="reset">Reset</button> <hr> <input type="text" id="input"> <div>Score: <span id="score"></span></div> </body>
</html>