这确实是AMD格式的限制。您可以使用导出，该问题就消失了。我发现导出很丑陋，但这是常规CommonJS模块如何解决此问题的方法：
define("Employee", ["exports", "Company"], function(exports, Company) {
function Employee(name) {
this.name = name;
this.company = new Company.Company(name + "'s own company");
};
exports.Employee = Employee;
});
define("Company", ["exports", "Employee"], function(exports, Employee) {
function Company(name) {
this.name = name;
this.employees = [];
};
Company.prototype.addEmployee = function(name) {
var employee = new Employee.Employee(name);
this.employees.push(employee);
employee.company = this;
};
exports.Company = Company;
});
否则，您在消息中提到的require（“ Employee”）也将起作用。
通常，对于模块，您需要更加了解循环依赖性，无论是否存在AMD。即使在普通的JavaScript中，也必须确保在示例中使用类似G对象的对象。
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