画像もjavascriptも使わずCSSのみで作られたストップウォッチです。ただし、背景画像、CSSのプレフィックス用とソース表示用のjavascriptは使用しています。

このページに掲載している内容は、オリジナルから少し変更（主にデザイン）しています。

HTMLソース

<div class="container">
	<!-- time to add the controls -->
	<input id="start" name="controls" type="radio" />
	<input id="stop" name="controls" type="radio" />
	<input id="reset" name="controls" type="radio" />
	<div class="timer">
		<div class="cell">
			<div class="numbers tenhour moveten">0 1 2 3 4 5 6 7 8 9</div>
		</div>
		<div class="cell">
			<div class="numbers hour moveten">0 1 2 3 4 5 6 7 8 9</div>
		</div>
		<div class="cell divider"><div class="numbers">:</div></div>
		<div class="cell">
			<div class="numbers tenminute movesix">0 1 2 3 4 5 6</div>
		</div>
		<div class="cell">
			<div class="numbers minute moveten">0 1 2 3 4 5 6 7 8 9</div>
		</div>
		<div class="cell divider"><div class="numbers">:</div></div>
		<div class="cell">
			<div class="numbers tensecond movesix">0 1 2 3 4 5 6</div>
		</div>
		<div class="cell">
			<div class="numbers second moveten">0 1 2 3 4 5 6 7 8 9</div>
		</div>
		<div class="cell divider"><div class="numbers">:</div></div>
		<div class="cell">
			<div class="numbers milisecond moveten">0 1 2 3 4 5 6 7 8 9</div>
		</div>
		<div class="cell">
			<div class="numbers tenmilisecond moveten">0 1 2 3 4 5 6 7 8 9</div>
		</div>
		<div class="cell">
			<div class="numbers hundredmilisecond moveten">0 1 2 3 4 5 6 7 8 9</div>
		</div>
	</div>
	<!-- Lables for the controls -->
	<div id="timer_controls">
		<label for="start">Start</label>
		<label for="stop">Stop</label>
		<label for="reset">Reset</label>
	</div>
</div>

CSSソース

.container {
	width:600px;
	height:240px;
	margin:30px auto;
	background:url(img2/fab-bg600x250.png) no-repeat;
	text-align: center;
	border-radius:120px;
}
.timer {
	margin-top:70px;
	padding: 10px;
	background: #237;
	overflow: hidden;
	display: inline-block;
	border: 7px solid #adf;
	border-radius: 5px;
	position: relative;
	box-shadow: 
	inset 0 -2px 10px 1px rgba(0, 0, 0, 0.75), 
	0 5px 20px -10px rgba(0, 0, 0, 1);
}
.cell {
	width: 0.60em;
	height: 40px;
	font-size: 50px;
	overflow: hidden;
	position: relative;
	float: left;
}
.numbers {
	width: 0.6em;
	line-height: 40px;
	font-family: digital, arial, verdana;
	text-align: center;
	color:#fff; 
	position: absolute;
	top: 0;
	left: 0;	
	text-shadow: 0 0 5px rgba(255, 255, 255, 1);
}
#timer_controls {
	margin-top: 15px;
}
#timer_controls label {
	cursor: pointer;
	padding:5px 15px;
	background: #efefef;
	font-family: arial, verdana, tahoma;
	font-size: 15px;
	border-radius: 3px;
}
input[name="controls"] {display: none;}

/*Control code*/
#stop:checked~.timer .numbers {animation-play-state: paused;}
#start:checked~.timer .numbers {animation-play-state: running;}
#reset:checked~.timer .numbers {animation: none;}
.moveten {
	animation: moveten 1s steps(10, end) infinite;
	animation-play-state: paused;
}
.movesix {
	animation: movesix 1s steps(6, end) infinite;
	animation-play-state: paused;
}
.second {animation-duration: 10s;}
.tensecond {animation-duration: 60s;} /*60 times .second*/
.milisecond {animation-duration: 1s;} /*1/10th of .second*/
.tenmilisecond {animation-duration: 0.1s;}
.hundredmilisecond {animation-duration: 0.01s;}
.minute {animation-duration: 600s;} /*60 times .second*/
.tenminute {animation-duration: 3600s;} /*60 times .minute*/
.hour {animation-duration: 36000s;} /*60 times .minute*/
.tenhour {animation-duration: 360000s;} /*10 times .hour*/
@keyframes moveten {
	0% {top: 0;}
	100% {top: -400px;} 
}
@keyframes movesix {
	0% {top: 0;}
	100% {top: -240px;} 
}
@font-face {
	font-family: 'digital';
	src: url('http://thecodeplayer.com/uploads/fonts/DS-DIGI.TTF');
}

CSSストップウォッチ