echarts平分日期参数(横坐标太长，取几个中间值)

option = {
    xAxis: {
        type: 'category',
        data: [
            '2021-05-20',
            '2021-05-19',
            '2021-05-18',
            '2021-05-17',
            '2021-05-16',
            '2021-05-15',
            '2021-05-14',
            '2021-05-13',
            '2021-05-12',
            '2021-05-11',
            '2021-05-10',
            '2021-05-09',
            '2021-05-08',
            '2021-05-07',
            '2021-05-06'
        ],
         axisLabel: {
           interval: 3,
         },
    },
    yAxis: {
        type: 'value'
    },
    series: [{
        data: [150, 230, 224, 218, 135, 147, 260,150, 230, 224, 218, 135, 230, 224, 218],
        type: 'line'
    }]
};

其中 interval 为间隔长度，可自定义（如果是时间格式，echarts会自动处理）

 axisLabel: {
   interval: 3,
 },