extra-utils

extra-utils

Utilities for JavaScript and Typescript.

Install

npm install --save extra-utils
# or
yarn add extra-utils

API

pipe

function pipe<T, U>(
  value: T
, ...operators: [
    ...Array<(value: T) => T>
  , (value: T) => U
  ]
): U

Enum

function inEnum<T>(val: unknown, _enum: object): val is T
function notInEnum<T, U>(val: T, _enum: object): val is Exclude<T, U>

Array

function isArray<T>(val: unknown): val is Array<T>
function isntArray<T>(val: T): val is Exclude<T, Array<unknown>>

function isEmptyArray(val: unknown[]): boolean
function isntEmptyArray<T>(val: T[]): val is NonEmptyArray<T>

Number, BigInt

function isNumber(val: unknown): val is number
function isntNumber<T>(val: T): val is Exclude<T, number>

function isFinite(val: number): boolean
function isPositiveInfinity(val: number): boolean
function isNegativeInfinity(val: number): boolean

function isNaN(val: number): boolean
function isntNaN(val: number): boolean

function isBigInt(val: unknown): val is bigint
function isntBigInt<T>(val: T): val is Exclude<T, bigint>

Boolean

function isBoolean(val: unknown): val is boolean

function isFalsy(val: unknown): val is Falsy
function isntFalsy<T>(val: T): val is Exclude<T, Falsy>

String

function isString(val: unknown): val is string
function isntString<T>(val: T): val is Exclude<T, string>

function isChar(val: unknown): val is string
function isntChar(val: unknown): boolean

function isURLString(text: string): boolean
function isntURLString(text: string): boolean

Date

function isDate(val: unknown): val is Date
function isntDate<T>(val: T): val is Exclude<T, Date>

Function

function isFunction<T extends Function = (...args: any[]) => any>(
  val: unknown
): val is T
function isntFunction<T>(val: T): val is Exclude<T, Function>

Nullish

function isNullish(val: unknown): val is Nullish
function isntNullish<T>(val: T): val is Exclude<T, Nullish>

function isNull(val: unknown): val is null
function isntNull<T>(val: T): val is Exclude<T, null>

function isUndefined(val: unknown): val is undefined
function isntUndefined<T>(val: T): val is Exclude<T, undefined>

Object

function isObject(
  val: unknown
): val is object & Record<string | symbol | number, unknown>
function isntObject<T>(
  val: T
): val is Exclude<T, object & Record<string | symbol | number, unknown>>

function isPlainObject(
  val: unknown
): val is object & Record<string | symbol | number, unknown>
function isntPlainObject<T>(
  val: T
): val is Exclude<T, object & Record<string | symbol | number, unknown>>

function isEmptyObject(val: object): boolean
function isntEmptyObject(val: object): boolean

function isJson(val: unknown): Json
function isntJson<T>(val: T): val is Exclude<T, Json>

RegExp

function isRegExp(val: unknown): val is RegExp
function isntRegExp<T>(val: T): val is Exclude<T, RegExp>

Symbol

function isSymbol(val: unknown): val is symbol
function isntSymbol<T>(val: T): val is Exclude<T, symbol>