const toString = Object.prototype.toString;export function is(val: unknown, type: string) { return toString.call(val) === `[object ${type}]`;}export const isDef = <T = unknown>(val?: T): val is T => { return typeof val !== 'undefined';};export const isUnDef = <T = unknown>(val?: T): val is T => { return !isDef(val);};export const isObject = (val: any): val is Record<any, any> => { return val !== null && is(val, 'Object');};export function isDate(val: unknown): val is Date { return is(val, 'Date');}export function isNull(val: unknown): val is null { return val === null;}
export function isNumber(val: unknown): val is number { return is(val, 'Number');}export function isPromise<T = any>(val: unknown): val is Promise<T> { return is(val, 'Promise') && isObject(val) && isFunction(val.then) && isFunction(val.catch);}export function isString(val: unknown): val is string { return is(val, 'String');}export const isFunction = (val: unknown): val is Function => typeof val === 'function';export function isBoolean(val: unknown): val is boolean { return is(val, 'Boolean');}export function isRegExp(val: unknown): val is RegExp { return is(val, 'RegExp');}