榆树 - Select标签内的动态Html选项标签

List.map已经返回一个列表,但你仍然在方括号中,所以它包装在另一个列表中.用括号括起来:

customers = ["Select Customer","Customer 1","Customer 2","Customer 3"]
customerSelect =
  select [ ]
    (List.map customerItem customers)