echarts自适应屏幕大小切换升级版

<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8">
    <title>折线图堆叠</title>
    <!-- 引入 echarts.js -->
    <script src="https://cdn.staticfile.org/echarts/4.3.0/echarts.min.js"></script>
</head>
<body>
    <h1 style="text-align: center;">折线图堆叠</h1>
    <!-- 为ECharts准备一个具备大小（宽高）的Dom -->
    <div id="main" style="max-width: 1920px;margin: auto"></div>
    <script type="text/javascript">
        function fn (){
    var vh= window.innerHeight*0.7;
    var vw= window.innerWidth*0.7;
    document.getElementById('main').style.height=vh+'px';
    document.getElementById('main').style.width=vw+'px';
        }
        fn()
        var myChart = echarts.init(document.getElementById('main'));
  option = {
    title: {
        text: '折线图堆叠'
    },
    tooltip: {
        trigger: 'axis'
    },
    legend: {
        data: ['邮件营销', '联盟广告', '视频广告', '直接访问', '搜索引擎']
    },
    grid: {
        left: '3%',
        right: '4%',
        bottom: '3%',
        containLabel: true
    },
    toolbox: {
        feature: {
            saveAsImage: {}
        }
    },
    xAxis: {
        type: 'category',
        boundaryGap: false,
        data: ['周一', '周二', '周三', '周四', '周五', '周六', '周日']
    },
    yAxis: {
        type: 'value'
    },
    series: [
        {
            name: '邮件营销',
            type: 'line',
            stack: '总量',
            data: [120, 132, 101, 134, 90, 230, 210]
        },
        {
            name: '联盟广告',
            type: 'line',
            stack: '总量',
            data: [220, 182, 191, 234, 290, 330, 310]
        },
        {
            name: '视频广告',
            type: 'line',
            stack: '总量',
            data: [150, 232, 201, 154, 190, 330, 410]
        },
        {
            name: '直接访问',
            type: 'line',
            stack: '总量',
            data: [320, 332, 301, 334, 390, 330, 320]
        },
        {
            name: '搜索引擎',
            type: 'line',
            stack: '总量',
            data: [820, 932, 901, 934, 1290, 1330, 1320]
        }
    ]
};

    myChart.setOption(option);
    window.onresize=function () {
        fn();
        myChart.resize();
    }

    </script>
</body>
</html>
echarts自适应屏幕大小切换升级版

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