导入模块错误不是函数？

我有文件导出'item-state-manager.js':

module.exports.aggregate_states = function (member_states) {
    console.log(member_states);
 }

其他文件应导入此模块并使用函数'aggregate_states':

var aggregate_states = require("./item-state-manager.js")

module.exports.saveItem = function () {
 var aggregate = aggregate_states("state");
}

但我收到错误:

TypeError: aggregate_states is not a function

我导入'item-state-manager.js'错了吗？

据我所知,require返回module.exports对象.

如果aggregate_states是您要导出的唯一函数,请使用此函数.

module.exports = function (member_states) {
    console.log(member_states);
}

否则像这样导入它.

var aggregate_states = require("./item-state-manager.js").aggregate_states;