echars 放大缩小的控制条与X轴重叠怎么办？容器是overflow：hidden了，-20会隐藏

Question

grid: {

         y2: "200px"
        },
        dataZoom: [            //长条
            {                type: 'slider',
                start: 0,
                end: 100,
                bottom:"-20px"
            },            //滚轮
            {                type: 'inside',
                realtime: true,
                start: 0,
                end: 100
            }
        ],