常用js ​

export const objectToString = Object.prototype.toString
export function toTypeString(value: unknown): string {
  return objectToString.call(value)
}

export const isArray = Array.isArray

export function isMap(val: unknown): val is Map<any, any> {
  return toTypeString(val) === '[object Map]'
}

export function isSet(val: unknown): val is Set<any> {
  return toTypeString(val) === '[object Set]'
}

export function isDate(val: unknown): val is Date {
  return toTypeString(val) === '[object Date]'
}

export function isRegExp(val: unknown): val is RegExp {
  return toTypeString(val) === '[object RegExp]'
}

export function isFunction(val: unknown): val is Function {
  return typeof val === 'function'
}

export const isString = (val: unknown): val is string => typeof val === 'string'

export const isSymbol = (val: unknown): val is symbol => typeof val === 'symbol'

export function isObject(val: unknown): val is Record<any, any> {
  return val !== null && typeof val === 'object'
}

export function isPromise<T = any>(val: unknown): val is Promise<T> {
  return (
    (isObject(val) || isFunction(val))
    && isFunction((val as any).then)
    && isFunction((val as any).catch)
  )
}

export const objectToString = Object.prototype.toString
export function toTypeString(value: unknown): string {
  return objectToString.call(value)
}

export const isArray = Array.isArray

export function isMap(val: unknown): val is Map<any, any> {
  return toTypeString(val) === '[object Map]'
}

export function isSet(val: unknown): val is Set<any> {
  return toTypeString(val) === '[object Set]'
}

export function isDate(val: unknown): val is Date {
  return toTypeString(val) === '[object Date]'
}

export function isRegExp(val: unknown): val is RegExp {
  return toTypeString(val) === '[object RegExp]'
}

export function isFunction(val: unknown): val is Function {
  return typeof val === 'function'
}

export const isString = (val: unknown): val is string => typeof val === 'string'

export const isSymbol = (val: unknown): val is symbol => typeof val === 'symbol'

export function isObject(val: unknown): val is Record<any, any> {
  return val !== null && typeof val === 'object'
}

export function isPromise<T = any>(val: unknown): val is Promise<T> {
  return (
    (isObject(val) || isFunction(val))
    && isFunction((val as any).then)
    && isFunction((val as any).catch)
  )
}

export const isEmptyArray = (val: unknonw) => Array.isArray(val) && val.length

export const isEmptyArray = (val: unknonw) => Array.isArray(val) && val.length