如何知道一个承诺已经实现，所以我可以链接到它或使用它的结果？

When a user selects an employee, I make an async request to the server for the employee's events. If the user then proceeds to assign a task to the employee they selected before the server can respond with the event list for the employee, I need to defer that assignment until the event list arrives. The event list is loaded via When a user selects an employee, I make an asyn