使用 const 枚举键（不是值）作为接口属性

Question

In following code variable x has properties a and z , but I want it to have a and b . How can I express that in typescript?

const enum CE {
    a = "a",
    b = "z",
}

declare var x: Record<CE, any> // has 'a' and 'z'

Answer 1

Enum is variable itself, so you can query its type with typeof CE , then get its keys with keyof :

declare var x: Record<keyof typeof CE, any> // Record<"a" | "b", any>

Playground