typescript泛型

• Z时代
• 2024-01-10
• 分类：技术分享

interface EventMap {
"select": (id: string) => void;
"update": () => void;
}
interface IEvent<K extends keyof EventMap> {
type: string;
fn: EventMap[K]
}
interface CustomMap<K extends keyof EventMap> {
[key: string]: IEvent<K>
}
const map: CustomMap = {}

我期望map的key为EventMap的key，value为IEvent结构

typescript">interface EventMap {
"select": (id: string) => void;
"update": () => void;
}
interface IEvent<K extends keyof EventMap> {
type: string;
fn: EventMap[K]
}
type CustomMap = {
[K in keyof EventMap]: IEvent<K>
}
const map: CustomMap = {}

当然了，也可以整合一下更清爽：

interface EventMap {
"select": (id: string) => void;
"update": () => void;
}
type CustomMap = {
[K in keyof EventMap]: {
type: string;
fn: EventMap[K]
}
}
const map: CustomMap = {}

回答

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