数据图表之圆柱图

需求是这样的，需要一个圆柱实现展示内存的占用变化。

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        .column{
            position: relative;
            width: 300px;
            height: 100px;
            border-left: 1px gray solid;
            border-right: 1px gray solid;
            margin: 100px auto;
            background-color: #00AFE9;
        }
        .column:before{
            position: absolute;
            content: '';
            display: block;
            height: 20px;
            width: 100%;
            border: 1px solid;
            border-radius: 50%;
            top: -10.5px;
            z-index: 1;
        }
        .column:after{
            position: absolute;
            content: '';
            display: block;
            height: 20px;
            width: 100%;
            border-bottom: 1px solid;
            border-radius: 50%;
            bottom:-10px;
            background-color: #00AFE9;
        }
        .inner1{
            position: relative;
            width: 100%;
            height: 50px;
            background-color: white;
            text-align: center;
        }
        .inner1:after{
            position: absolute;
            content: '';
            display: block;
            height: 20px;
            width: 100%;
            border-radius: 50%;
            background-color: white;
            bottom: -10px;
        }
        .inner1 h5{
            position: absolute;
            top: 0;
            left: 50%;
            transform: translateX(-50%);
            z-index: 1;
        }
    </style>
</head>
<body>
<div id="app">
    <div  class="column">
        <div class="inner1" :style="getHeight()">
            <h5>{{msg}}G/1T</h5>
        </div>
    </div>
    <button @click="add">增加</button>
</div>
<script type="text/javascript" src="https://unpkg.com/vue"></script>
<script>
    let vm=new Vue(
        {
            el:'#app',
            data(){
                return{
                   msg:0
                }
            },
            methods:{
                getHeight(){
                    let num=null;
                    num=this.msg/1025;
                    num=100-(num*100);
                    return{height: num+'px'}
                },
                add(){ 
                    this.msg+=100
                }
            }
        }
    )
</script>
</body>
</html>

按钮的作用是更加方便观看效果。这里引入了vue.js

原生也是可以轻松实现的要是想要稍微一点的效果还可以加上

transition 设置动画

数据图表之圆柱图

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