x轴换行

//图表文字格式化
let textFormatter = function(e) {
  let newStr = " ";
  let start, end;
  let name_len = [图片上传失败...(image-236576-1592379384926)]

e.name.length; //每个内容名称的长度
  let max_name = 6; //每行最多显示的字数
  let new_row = Math.ceil(name_len / max_name); // 最多能显示几行，向上取整比如2.1就是3行
  if (name_len > max_name) {
    //如果长度大于每行最多显示的字数
    for (let i = 0; i < new_row; i++) {
      //循环次数就是行数
      let old = ""; //每次截取的字符
      start = i * max_name; //截取的起点
      end = start + max_name; //截取的终点
      if (i == new_row - 1) {
        //最后一行就不换行了
        old = [图片上传失败...(image-2bd6fd-1592379384926)]

e.name.substring(start);
      } else {
        old = [图片上传失败...(image-699162-1592379384926)]

e.name.substring(start, end) + "\n";
      }
      newStr += old; //拼接字符串
    }
  } else {
    //如果小于每行最多显示的字数就返回原来的字符串
    newStr = [图片上传失败...(image-c78a08-1592379384926)]

e.name;
  }
  return newStr;
};