我了解keyof
运算符,以及如何创建由该对象的键组成的并集类型,如下所示:
interface Foo {
a: string;
b: string;
}
type Goo = keyof Foo; // "a" | "b"
我想做相反的事情,并通过键的组合创建一个新的对象类型。
const MakeTuple = <T extends string[]>(...args: T) => args;
const Types = MakeTuple("A", "B", "C");
type TypeVariant = typeof Types[number];
type VariantObject = {
// This gives error consider using a mapped object but I'm not sure how to do that
[type: TypeVariant]: [boolean, boolean, boolean, string[]];
}
所以我想要的是合并一个键并生成一个类型,该类型包含类型为[boolean, boolean, boolean, string[]]
的每个键的值。
答案 0 :(得分:2)
您可以只使用预定义的Record
映射类型
const MakeTuple = <T extends string[]>(...args: T) => args;
const Types = MakeTuple("A", "B", "C");
type TypeVariant = typeof Types[number];
type VariantObject = Record< TypeVariant, [boolean, boolean, boolean, string[]] >