data-of-type

Determine the type of JavaScript data

Install

Install with npm

  npm install --save data-of-type

Usage

import {isNull,isUndefined,isString,isBoolean,isNumber,isFunction,isAsyncFunction,isArray,isObject,isArrayBuffer,isDate,isError,isMap, isSet, isPromise,isSymbol,isWeakMap, isWeakSet, isValidString, isValidNumber, isValidArray, isValidObject} from 'data-of-type';
// or
// const { isNull,isUndefined,isString,isBoolean,isNumber,isFunction,isAsyncFunction,isArray,isObject,isArrayBuffer,isDate,isError,isMap, isSet, isPromise,isSymbol,isWeakMap, isWeakSet, isValidString, isValidNumber, isValidArray, isValidObject } =  require('data-of-type');


// isNull
console.log(isNull(null)); //true
console.log(isNull(undefined)); //false
console.log(isNull('')); //false
console.log(isNull(1)); //false


// isUndefined
console.log(isUndefined(undefined)); //true
console.log(isUndefined(null)); //false
console.log(isUndefined('')); //false
console.log(isUndefined(1)); //false

// isString
console.log(isString('')); //true
console.log(isString('123')); //true
console.log(isString(1)); //false
console.log(isString(true)); //false
console.log(isString({})); //false


// isValidString
console.log(isValidString('123')); //true
console.log(isValidString('')); //false
console.log(isValidString(' ')); //false


// isBoolean
console.log(isBoolean(false)); //true
console.log(isBoolean(true)); //true
console.log(isBoolean('123')); //false
console.log(isBoolean(1)); //false

// isNumber
console.log(isNumber(1)); //true
console.log(isNumber('123')); //false
console.log(isNumber(false)); //false
console.log(isNumber({})); //false

// isValidNumber
console.log(isValidNumber(1)); //true
console.log(isValidNumber(1123123123123123123123123)); //false
console.log(isValidNumber(-1123123123123123123123123)); //false
console.log(isValidNumber(NaN)); //false
console.log(isValidNumber(Infinity)); //false


//isFunction
console.log(isFunction(function(){})); //true
console.log(isFunction('123')); //false
console.log(isFunction(1)); //false
console.log(isFunction({})); //false
console.log(isFunction([])); //false

// isAsyncFunction
console.log(isAsyncFunction(function(){})); //false
console.log(isAsyncFunction(async function(){})); //true
  
// isArray
console.log(isArray([])); //true
console.log(isArray([1,2,3])); //true
console.log(isArray('123')); //false
console.log(isArray(1)); //false
console.log(isArray({})); //false


// isValidArray
console.log(isValidArray([])); //false
console.log(isValidArray([1])); //true
console.log(isValidArray('123')); //false
console.log(isValidArray(1)); //false
console.log(isValidArray({})); //false


// isObject
console.log(isObject({})); //true
console.log(isObject({age:1})); //true
console.log(isObject('123')); //false
console.log(isObject(1)); //false
console.log(isObject([])); //false

// isValidObject
console.log(isValidObject({})); //false
console.log(isValidObject({age:1})); //true


// isArrayBuffer
console.log(isArrayBuffer(new ArrayBuffer())); //true
console.log(isArrayBuffer([])); //false
console.log(isArrayBuffer({age:1})); //false
console.log(isArrayBuffer([1,2,3])); //false

// isDate
console.log(isDate(new Date())); //true

// isError
console.log(isError(new Error())); //true

// isMap
console.log(isMap(new Map())); //true

//isSet
console.log(isSet(new Set())); //true

//isPromise
console.log(isPromise(new Promise((resolve)=> resolve()))); //true

//isSymbol
console.log(isSymbol(Symbol(2))); //true

//isWeakMap
console.log(isWeakMap(new WeakMap())); //true

//isWeakSet
console.log(isWeakSet(new WeakSet())); //true

methods

method	Parameter type	Return type
isNull	any	Boolean
isUndefined	any	Boolean
isString	any	Boolean
isValidString	any	Boolean
isBoolean	any	Boolean
isNumber	any	Boolean
isValidNumber	any	Boolean
isFunction	any	Boolean
isAsyncFunction	any	Boolean
isArray	any	Boolean
isValidArray	any	Boolean
isObject	any	Boolean
isValidObject	any	Boolean
isArrayBuffer	any	Boolean
isDate	any	Boolean
isError	any	Boolean
isMap	any	Boolean
isSet	any	Boolean
isPromise	any	Boolean
isSymbol	any	Boolean
isWeakMap	any	Boolean
isWeakSet	any	Boolean

Test

More examples to see the test

  npm test