背景：根据不同季度的销售额，生成对应的柱形图，直观的看出差异
效果：
代码
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<style>
* {
margin: 0;
padding: 0;
}
body {
background-color: #0c143d;
}
.box {
display: flex;
justify-content: space-around;
align-items: flex-end;
width: 800px;
min-height: 300px;
border-left: 1px solid #4b578f;
border-bottom: 1px solid #4b578f;
margin: 0 auto;
padding-top: 50px;
text-align: center;
color: #9799ab;
}
.box>div {
position: relative;
display: flex;
flex-direction: column;
justify-content: space-between;
width: 40px;
height: 0;
background: linear-gradient(#3c99ff, #4489d0, #2283e4);
cursor: pointer;
border-radius: 8px 8px 0 0;
transition: all .2s;
}
.box>div:hover {
animation: bg .5s alternate infinite;
}
@keyframes bg {
to {
box-shadow: 0 5px 29px rgb(53 111 226 / 88%);
background: linear-gradient(#3c99ff, #68aff6, #2283e4);
}
}
.box>div::after {
content: '';
position: absolute;
bottom: 0;
left: 50%;
width: 2px;
height: 10px;
background-color: #4b578f;
transform: translate(-50%, 100%);
}
.box div span {
width: 60px;
margin: -30px 0 -5px -6px;
}
.box div h4 {
width: 70px;
margin: 0 0 -35px -10px;
}
.title {
margin-top: 50px;
text-align: center;
color: #9799ab;
}
</style>
</head>
<body>
<h3 class="title">2099年季度销售数额（单位万）</h3>
<!-- <div class="box">
<div style="height: 123px;" title="第1季度-123万">
<span>123万</span>
<h4>第1季度</h4>
</div>
<div style="height: 156px;" title="第2季度-156万">
<span>156万</span>
<h4>第2季度</h4>
</div>
<div style="height: 120px;" title="第3季度-120万">
<span>120万</span>
<h4>第3季度</h4>
</div>
<div style="height: 210px;" title="第4季度-210万">
<span>210万</span>
<h4>第4季度</h4>
</div>
</div> -->
<script>
// 功能1： 用户输入4次，并且把数据存放到数组里面
// 1.1 声明一个空的数组
let arr = []
// 1.2 利用循环的形式让用户输入4次，并且把数据追加给数组
for (let i = 1; i <= 4; i++) {
let num = +prompt(`请您输入第${i}季度的销售额`)
arr.push(num)
}
console.log(arr)
// 功能2：根据数组生成柱形图
// 2.1 声明一个空的字符串 str
let str = ''
// 2.2 利用循环拼接字符串，生成多个柱子
for (let i = 0; i < arr.length; i++) {
str += `
<div style="height: ${arr[i]}px;" title="第${i + 1}季度-${arr[i]}万">
<span>${arr[i]}万</span>
<h4>第${i + 1}季度</h4>
</div>
`
}
console.log(str)
// 2.3 把生成的柱子放到box盒子里面进行渲染
document.write(`
<div class="box">
${str}
</div>
`)
</script>
</body>
</html>