interface 接口

0710

TS 函数的类型声明

• vuex@3.0.0 (opens new window)
• ts docs (opens new window)

interface Func {
    (map: string): boolean
}

let myFunc: Func = (map) => true;

myFunc('1');

type Computed = () => any;

type Dictionary<T> = {
  [key: string]: T;
};

interface GetTruthy {
  (map: string): boolean;
}

interface Mapper<R> {
  (map: string[]): Dictionary<R>;
  (map: Dictionary<string>): Dictionary<R>;
}

泛型 未使用泛型

type Getter = (state, getters, rootState, rootGetters) => any;

export interface GetterTree {
  [key: string]: Getter
}

使用泛型

type Getter<S, R> = (state: S, getters: any, rootState: R, rootGetters: any) => any;

export interface GetterTree<S, R> {
  [key: string]: Getter<S, R>
}