将树形结构的复杂数组转换为一维数组

  flattenOptions(options) {
      let flattenedOptions = []
      options.forEach((option) => {
        flattenedOptions.push(option)
        if (option.children && option.children.length > 0) {
          flattenedOptions = flattenedOptions.concat(this.flattenOptions(option.children))
        }
      })
      return flattenedOptions
    },

 调用flattenOptions方法 传入要转换的数组 确定数组children有固定的标识