@pbbbl/is

A rewritten module/fork of is

Rewritten for Typescript, ES6 and beyond. Working on tree-shakable imports (future).

Key Differences

Tree Shakable-ish

This is a work in progress as my es skills are growing.

Typed (Typescript)

Rewritten in Typescript.

Improved Types

I realize a strongly-typed application shouldn't need is, but it is needed in some edge-cases. .. @types/is has out-of-date types, or types not found by Typescript. Using is.nil (the non-deprecated replacement for is.null) will throw an error in ts files.

• The same issue is present with other now-deprecated methods ()

Using "submethods" ( is.[method].[sub-method] ) like is.array.empty in a .ts file will throw errors.

ES6+, CJS, TS compatible

Again, a work in progress due to my underwhelming TS skills.

Example of Syntax Differences

Take this example where will would check if const checkNull=null; is a null value...

With is

// In CJS
const is = require('is');
// In ES, TS modules
// import is from 'is';

const checkNull:boolean = is.nil(null); // checkNull=true

With @pbbbl/is

// In CJS
const {isNull} = require('@pbbbl/is');
// In ES, TS modules
// import {isNull} from '@pbbbl/is';

const checkNull:boolean = isNull(null); // checkNull=true

Methods

isActualNaN (value:any):boolean;

// check if value is type
isType(value:any, type:string):boolean;

// Same as isType. Replaces is.a which is the non-deprecated version of `is.type`
isA(value:any, type:string):boolean;

isDefined (value:any):boolean;

isEmpty(value:any):boolean;

isEmptyString(value:any, trimmed:boolean):boolean;

isEqual(value:any, other:any):boolean;

isHosted (value:any, host:any):boolean;

isInstance (value:any, constructor:any):boolean;

isInstanceOf (value:any, constructor:any):boolean;

isNull (value:any):boolean;

isNil (value:any):boolean;

isUndefined (value:any):boolean;

isUndef (value:any):boolean;

isArguments (value:any):boolean;

isArray(value:any):boolean;

isArgumentsEmpty (value:any):boolean;

isEmptyArguments (value:any):boolean;

isEmptyArray(value:any):boolean;

isArrayEmpty(value:any):boolean;

isArrayLike (value:any):boolean;

isBool (value:any):boolean;

isBoolean (value:any):boolean;

isFalse(value:any):boolean;

isTrue(value:any):boolean;

isDate(value:any):boolean;

isDateValid(value:any):boolean;

isValidDate(value:any):boolean;

isElement (value:any):boolean;

isError (value:any):boolean;

isFunction (value:any):boolean;

isFn (value:any):boolean;

isNumber (value:any):boolean;

isInfinite (value:any):boolean;

isDecimal (value:any):boolean;

isDivisibleBy (value:any, n:number):boolean;

isInt (value:any):boolean;

isInteger (value:any):boolean;

isMaximum (value:any, others:any[]):boolean;

isMinimum (value:any, others:any[]):boolean;

isNaN (value:any):boolean;

isEven(value:any) ;

isOdd (value:any):boolean;

isGe (value:any,other:any):boolean;

isGt (value:any,other:any):boolean;

isLe(value:any,other:any):boolean;

isLt (value:any,other:any):boolean;

isWithin (value:number, start:number, finish:number):boolean;

isObject(value:any):boolean;

isEmptyObject(value:any):boolean;

isPrimitive(value:any):boolean;

isHash(value:any):boolean;

isRegexp (value:any):boolean;

isString (value:any):boolean;

isStringEmpty(value:any):boolean;

isBase64 (value:any):boolean;

isHex(value:any):boolean;

isSymbol (value:any):boolean;

isBigInt (value:any):boolean;

isJSON (value:any):boolean;