danieluhl/JS30-01-fun.html

## JS30-01-fun.html
<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>JS + CSS Clock</title>
</head>
<body>

  <div class="clock">
    <div class="clock-face">
      <div class="hand hour-hand"></div>
      <div class="hand min-hand"></div>
      <div class="hand second-hand"></div>
    </div>
  </div>


  <style>
    html {
      background:#018DED url(http://unsplash.it/1500/1000?image=881&blur=50);
      background-size:cover;
      font-family:'helvetica neue';
      text-align: center;
      font-size: 10px;
    }

    body {
      font-size: 2rem;
      display:flex;
      flex:1;
      min-height: 100vh;
      align-items: center;
    }

    .clock {
      width: 30rem;
      height: 30rem;
      border:20px solid white;
      border-radius:50%;
      margin:50px auto;
      position: relative;
      padding:2rem;
      box-shadow:
        0 0 0 4px rgba(0,0,0,0.1),
        inset 0 0 0 3px #EFEFEF,
        inset 0 0 10px black,
        0 0 10px rgba(0,0,0,0.2);
    }

    .clock-face {
      position: relative;
      width: 100%;
      height: 100%;
      transform: translateY(-3px); /* account for the height of the clock hands */
    }

    .hand {
      width:50%;
      height:6px;
      background:black;
      position: absolute;
      top:50%;
      transform-origin: 100%;
      transform: rotate(90deg);
      transition: all 0.05s;
      transition-timing-function: cubic-bezier(0.2, 1.85, 0.4, 1.6);
    }

  </style>

  <script>
    const partialApply = (fn, ...args) => fn.length <= args.length ?
      fn.apply(this, args) : (...nextArgs) =>
        partialApply.call(this, fn, ...args, ...nextArgs);

    const getDeg = (divisor, units) => ((360 / divisor) * units) + 90
    const setStyle = (el, deg) => el.style.transform = `rotate(${deg}deg)`;

    // give an element, divisor, function for getting time, and the current time
    //  set the style for the element
    const setElTime = (el, divisor, timeFn, now) => setStyle(el, getDeg(divisor, now[timeFn]()));

    const setFunctions = [
      partialApply(setElTime, document.querySelector('.second-hand'), 60, 'getSeconds'),
      partialApply(setElTime, document.querySelector('.min-hand'), 60, 'getMinutes'),
      partialApply(setElTime, document.querySelector('.hour-hand'), 12, 'getHours'),
    ];

    const setTime = () => {
      const now = new Date();
      setFunctions.forEach((fn) => fn(now));
    }

    setInterval(setTime, 1000);
  </script>
</body>
</html>
	<!DOCTYPE html>
	<html lang="en">
	<head>
	<meta charset="UTF-8">
	<title>JS + CSS Clock</title>
	</head>
	<body>

	<div class="clock">
	<div class="clock-face">
	<div class="hand hour-hand"></div>
	<div class="hand min-hand"></div>
	<div class="hand second-hand"></div>
	</div>
	</div>


	<style>
	html {
	background:#018DED url(http://unsplash.it/1500/1000?image=881&blur=50);
	background-size:cover;
	font-family:'helvetica neue';
	text-align: center;
	font-size: 10px;
	}

	body {
	font-size: 2rem;
	display:flex;
	flex:1;
	min-height: 100vh;
	align-items: center;
	}

	.clock {
	width: 30rem;
	height: 30rem;
	border:20px solid white;
	border-radius:50%;
	margin:50px auto;
	position: relative;
	padding:2rem;
	box-shadow:
	0 0 0 4px rgba(0,0,0,0.1),
	inset 0 0 0 3px #EFEFEF,
	inset 0 0 10px black,
	0 0 10px rgba(0,0,0,0.2);
	}

	.clock-face {
	position: relative;
	width: 100%;
	height: 100%;
	transform: translateY(-3px); /* account for the height of the clock hands */
	}

	.hand {
	width:50%;
	height:6px;
	background:black;
	position: absolute;
	top:50%;
	transform-origin: 100%;
	transform: rotate(90deg);
	transition: all 0.05s;
	transition-timing-function: cubic-bezier(0.2, 1.85, 0.4, 1.6);
	}

	</style>

	<script>
	const partialApply = (fn, ...args) => fn.length <= args.length ?
	fn.apply(this, args) : (...nextArgs) =>
	partialApply.call(this, fn, ...args, ...nextArgs);

	const getDeg = (divisor, units) => ((360 / divisor) * units) + 90
	const setStyle = (el, deg) => el.style.transform = `rotate(${deg}deg)`;

	// give an element, divisor, function for getting time, and the current time
	// set the style for the element
	const setElTime = (el, divisor, timeFn, now) => setStyle(el, getDeg(divisor, now[timeFn]()));

	const setFunctions = [
	partialApply(setElTime, document.querySelector('.second-hand'), 60, 'getSeconds'),
	partialApply(setElTime, document.querySelector('.min-hand'), 60, 'getMinutes'),
	partialApply(setElTime, document.querySelector('.hour-hand'), 12, 'getHours'),
	];

	const setTime = () => {
	const now = new Date();
	setFunctions.forEach((fn) => fn(now));
	}

	setInterval(setTime, 1000);
	</script>
	</body>
	</html>