echarts限制y轴文本长度

yAxis : [
    {
        type : 'category',
        data : ['场景选择一个','6','5','4','3','2','1'],
        axisLabel : {
                  color: "blue",
                  formatter:function (value) {
                      value = value.toString();
                      var maxlength=5;
                      if (value.length>maxlength) {
                          return value.substring(0, maxlength-1)+'...';
                      } else{
                          return value;
                      }
                  }
        }
    }
],