Question

以下是type alias部分中官方文档的示例。

type LinkedList<T> = T & { next: LinkedList<T> };

interface Person {
    name: string;
}

var people: LinkedList<Person>;
var s = people.name;
//var s = people.next.name;
//var s = people.next.next.name;
//var s = people.next.next.next.name;

当我尝试这个例子时，它会产生以下错误：

TypeError: Cannot read property 'name' of undefined

人是linkList类型。如何正确填写人员链接列表？

Answer 1

你应该为它赋值，只是声明类型是不够的。例如：

var people: LinkedList<Person> = {name: "Alf", next: {name: "Tim", next: null}};

类型别名中的打字稿类型交集

1 个答案: