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index.html
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index.html
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<!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 {
margin: 0;
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: rotate(90deg);
/* 將 時、分、秒針 從 45分 旋轉至 12點 方向 */
transform-origin: 100% 50%;
/* 將旋轉的原點移位 */
transition: all 0.05s cubic-bezier(0, 2.95, 1, 1);
/* 讓秒針有跳動的效果 */
border-radius: 50%;
/* 原先是 長方形 ,修改成 圓角 ,比較像 時針 */
}
.second-hand {
/* 秒針變紅色 */
background: red;
}
.hour-hand {
/* 將時針變短,並調整位置 */
width: 30%;
right: 50%;
}
</style>
<script>
const secondHand = document.querySelector('.second-hand');
const minHand = document.querySelector('.min-hand');
const hourHand = document.querySelector('.hour-hand');
function setDate() {
const nowDate = new Date();
//秒針
const seconds = nowDate.getSeconds();
// console.log(seconds);
const secondDegrees = (360 / 60) * seconds + 90;
// 修正秒針跳動的效果
if (secondDegrees === 90) {
secondHand.style.transition = 'all 0s';
} else {
secondHand.style.transition = 'all 0.05s cubic-bezier(0, 2.95, 1, 1)';
}
//修改CSS:第一種方法
// secondHand.setAttribute("style", `transform: rotate(${secondDegrees}deg)`);
//修改CSS:第二種方法
secondHand.style.transform = `rotate(${secondDegrees}deg)`
//分針
const mins = nowDate.getMinutes();
const minDegrees = (360 / 60) * mins + (6 / 60 * seconds) + 90;
// 修正分針跳動的效果
if (minDegrees === 90) {
minHand.style.transition = 'all 0s';
} else {
minHand.style.transition = 'all 0.05s cubic-bezier(0, 2.95, 1, 1)';
}
minHand.style.transform = `rotate(${minDegrees}deg)`
//時針
const hours = nowDate.getHours();
const hourDegrees = (360 / 12) * (hours % 12) + (30 / 60 * mins) + 90;
hourHand.style.transform = `rotate(${hourDegrees}deg)`
}
//每秒刷新時間
setInterval(setDate, 1000);
</script>
</body>
</html>