---初始化后台管理web页面项目

src/utils/types.ts

@@ -0,0 +1,42 @@
+// copy from element-plus
+
+import type { CSSProperties, Plugin } from 'vue';
+
+type OptionalKeys<T extends Record<string, unknown>> = {
+  [K in keyof T]: T extends Record<K, T[K]> ? never : K;
+}[keyof T];
+
+type RequiredKeys<T extends Record<string, unknown>> = Exclude<keyof T, OptionalKeys<T>>;
+
+type MonoArgEmitter<T, Keys extends keyof T> = <K extends Keys>(evt: K, arg?: T[K]) => void;
+
+type BiArgEmitter<T, Keys extends keyof T> = <K extends Keys>(evt: K, arg: T[K]) => void;
+
+export type EventEmitter<T extends Record<string, unknown>> = MonoArgEmitter<T, OptionalKeys<T>> &
+  BiArgEmitter<T, RequiredKeys<T>>;
+
+export type AnyFunction<T> = (...args: any[]) => T;
+
+export type PartialReturnType<T extends (...args: unknown[]) => unknown> = Partial<ReturnType<T>>;
+
+export type SFCWithInstall<T> = T & Plugin;
+
+export type Nullable<T> = T | null;
+
+export type RefElement = Nullable<HTMLElement>;
+
+export type CustomizedHTMLElement<T> = HTMLElement & T;
+
+export type Indexable<T> = {
+  [key: string]: T;
+};
+
+export type Hash<T> = Indexable<T>;
+
+export type TimeoutHandle = ReturnType<typeof global.setTimeout>;
+
+export type ComponentSize = 'large' | 'medium' | 'small' | 'mini';
+
+export type StyleValue = string | CSSProperties | Array<StyleValue>;
+
+export type Mutable<T> = { -readonly [P in keyof T]: T[P] };