今天给大家分享一个用原生JS实现的好看计数器，效果如下：
以下是代码实现，欢迎大家复制粘贴和收藏。
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>原生JS实现一个好看计数器</title>
<style>
* {
font-family: '微软雅黑', sans-serif;
box-sizing: border-box;
margin: 0;
padding: 0;
}
body {
display: flex;
justify-content: center;
align-items: center;
min-height: 100vh;
background: #000d0f;
}
.container {
position: relative;
width: 80px;
height: 50px;
border-radius: 40px;
border: 2px solid rgba(255, 255, 255, 0.2);
transition: 0.5s;
}
.container:hover {
width: 120px;
border: 2px solid rgba(255, 255, 255, 1);
}
.container .next {
position: absolute;
top: 50%;
right: 30px;
display: block;
width: 12px;
height: 12px;
border-top: 2px solid #fff;
border-left: 2px solid #fff;
z-index: 1;
transform: translateY(-50%) rotate(135deg);
cursor: pointer;
transition: 0.5s;
opacity: 0;
}
.container:hover .next {
opacity: 1;
right: 20px;
}
.container .prev {
position: absolute;
top: 50%;
left: 30px;
display: block;
width: 12px;
height: 12px;
border-top: 2px solid #fff;
border-left: 2px solid #fff;
z-index: 1;
transform: translateY(-50%) rotate(315deg);
cursor: pointer;
transition: 0.5s;
opacity: 0;
}
.container:hover .prev {
opacity: 1;
left: 20px;
}
#box span {
position: absolute;
display: none;
width: 100%;
height: 100%;
text-align: center;
line-height: 46px;
color: #00deff;
font-size: 24px;
font-weight: 700;
user-select: none;
}
#box span:nth-child(1) {
display: initial;
}
</style>
</head>
<body>
<div class="container">
<div class="next" onclick="nextNum()"></div>
<div class="prev" onclick="prevNum()"></div>
<div id="box">
<span>0</span>
</div>
</div>
<script>
let index = 0;
var numbers = document.getElementById('box');
for (let i = 0; i < 100; i++) {
let span = document.createElement('span');
span.textContent = i;
numbers.appendChild(span);
};
let num = numbers.getElementsByTagName('span');
function nextNum() {
num[index].style.display = 'none';
index = (index + 1) % num.length;
num[index].style.display = 'initial';
};
function prevNum() {
num[index].style.display = 'none'
index = (index - 1 + num.length) % num.length
num[index].style.display = 'initial'
};
</script>
</body>
</html>