Echarts跟随数据长度实现高度自适应解决出现滚动条的解决方案

    var myChart = echarts.init(document.getElementById("container"));
    var option = {
        yAxis: {
            type: 'category',
            interval: 0,
            data: ['Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat', 'Sun', 'Thu', 'Fri', 'Sat', 'Sun','Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat', 'Sun', 'Thu', 'Fri', 'Sat', 'Sun']
        },
        xAxis: {
            type: 'value'
        },
        series: [{
            data: [120, 200, 150, 80, 70, 110, 130, 80, 70, 110, 130,120, 200, 150, 80, 70, 110, 130, 80, 70, 110, 130],
            type: 'bar',
        }]
    }
    myChart.setOption(option);
    //柱状图y轴的长度 option.yAxis.data.length
    var autoHeight = option.yAxis.data.length * 50 + 150;
    myChart.getDom().style.height = this.autoHeight + "px";
    myChart.getDom().childNodes[0].style.height = this.autoHeight + "px";
    myChart.getDom().childNodes[0].childNodes[0].setAttribute("height", this.autoHeight);
    myChart.getDom().childNodes[0].childNodes[0].style.height = this.autoHeight + "px";
    myChart.getDom().childNodes[0].childNodes[0].style.background = "rgba(0,0,0,0.5)";
    //根据窗口的大小变动图表
    myChart.resize();