ll-package/types/index.d.ts

declare interface Fn<T = any, R = T> {
  (...arg: T[]): R
}

declare interface PromiseFn<T = any, R = T> {
  (...arg: T[]): Promise<R>
}

declare type RefType<T> = T | null

declare type LabelValueOptions = {
  label: string
  value: any
  [key: string]: string | number | boolean
}[]

declare type EmitType = (event: string, ...args: any[]) => void

declare type TargetContext = '_self' | '_blank'

declare interface ComponentElRef<T extends HTMLElement = HTMLDivElement> {
  $el: T
}

declare type ComponentRef<T extends HTMLElement = HTMLDivElement> =
  ComponentElRef<T> | null

declare type ElRef<T extends HTMLElement = HTMLDivElement> = Nullable<T>

// 声明一个Nullable类型，T可以是任意类型，也可以为null
declare type Nullable<T> = T | null
// 声明一个NonNullable类型，T必须是任意类型，不能为null
declare type NonNullable<T> = T extends null | undefined ? never : T
// 声明一个Recordable类型，T默认为任意类型
declare type Recordable<T = any> = Record<string, T>

declare type TimeoutHandle = ReturnType<typeof global.setTimeout>