Ecarts ineffective in solving resize, responsive achieve size

resize property,

Error writing

<!-- 为ECharts准备一个具备大小（宽高）的Dom(错误样式) -->
    <div id="main" style="width: 800px;height:800px;"></div>
      <script type="text/javascript">
        // 基于准备好的dom，初始化echarts实例
        var myChart = echarts.init(document.getElementById('main'));

        // 指定图表的配置项和数据
        var option = {
            title: {
                text: 'ECharts 入门示例'
            },
            tooltip: {},
            legend: {
                data:['销量']
            },
            xAxis: {
                data: ["衬衫","羊毛衫","雪纺衫","裤子","高跟鞋","袜子"]
            },
            yAxis: {},
            series: [{
                name: '销量',
                type: 'bar',
                data: [5, 20, 36, 10, 10, 20]
            }]
        };
        // 使用刚指定的配置项和数据显示图表。
        myChart.setOption(option);
		//监听浏览器窗口变化实现刷新改变大小
        window.onresize = myChart.resize;
       
    </script>

Invalid reasons:

As div ecarts container ( '# main') wide Gaoyao written percentage, width: 80%; height: 50vh ecarts otherwise not change size;