1.2.5 • Public • Published

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Input validator

Human-friendly and powerful data validator library for JavaScript


This project requires NodeJS (version 8 or later) and NPM. Node and NPM are really easy to install. To make sure you have them available on your machine, try running the following command.

$ npm -v && node -v

Getting Started

These instructions will help you to install this package in your project to perform data validation.


BEFORE YOU INSTALL: please read the prerequisites

Start with installation of package in your project:

$ npm i @saimulhasnain-dev/input-validator

After successful installation of package you need to import package in your file: To import complete package in once

$ import validator from '@saimulhasnain-dev/input-validator';

Or if you prefer using any particular function then:

$ import { isAlphabet } from '@saimulhasnain-dev/input-validator';


import validator from '@saimulhasnain-dev/input-validator';

let res = validator.isAlphabet('abc');//to verify string contains alphabet
console.log(res); // it will print `true` as it contains alphabet

validator.isStrongPassword('Qwert@!2313');//to check password strength

Accessing only required function

import { isValidEmail } from '@saimulhasnain-dev/input-validator';
isValidEmail('abc@gmail.com');//to test email is valid or not
import { getValueFromObject, isKeyExistsNested } from '@saimulhasnain-dev/input-validator';
const user = {
    name: "abc",
    email: "xyz@email.com",
    address: {
        state: "New york",
        country: "USA",
        phones: {
            primary: "+1234567890",
            secondary: "+0987654321"
getValueFromObject(user, ["address", "state"]);//to get value of `state` key inside `address` object
getValueFromObject(user, ["address", "phones","primary"])////to get value of `primary` key inside `phone` object inside `address`

isKeyExistsNested(user, "address", "phones","primary");// to check if key `primary` exists in this object or not

Available methods

  • isEmptyArray: To check if array is empty or not
  • isString: To check if value is string or not
  • isNumeric: To check string is numeric type
  • isValidEmail: To check email is valid or not
  • isAlphabet: To check if string contain alphabet only
  • isAlphaNumericOnly: To check if string contains alphabet and numeric as well
  • isSpecialCharAlphaNumeric: To check if string contains alphabet with combination of number and special characters
  • isUndefined: To check if variable is undefined
  • isNull: To check if variable is null
  • isBoolean: To check if variable boolean
  • isArray: To check if variable is an array
  • sanitizeString: To get sanitized version of value
  • toInt: To parse in integer format
  • toFloat: To parse in floating point format
  • toDate: To parse in date type
  • isURL: To check if a URL is valid or not
  • isValidNumber: To check valid numnber
  • isValidLatLong: To check valid latitude and longitude points
  • isStrongPassword: To check string password complexity
  • isMediumPassword: To check medium password complexity
  • isDate: To check if a value is date
  • isObject: To check if a value is object
  • isKeyExists: To check if a particular key is exists in an object or not(not in nested object)
  • isKeyExistsNested: To check if a particular key is exists in an object or not(in nested object)
  • getValueFromObject: To get value of a key from a nested object


Please read CONTRIBUTING.md for details on our code of conduct, and the process for submitting pull requests to us.

  1. Fork it!
  2. Create your feature branch: git checkout -b my-new-feature
  3. Add your changes: git add .
  4. Commit your changes: git commit -am 'Add some feature'
  5. Push to the branch: git push origin my-new-feature
  6. Submit a pull request 😎


All credit goes to me😎

Built With

  • Love


We use SemVer for versioning. For the versions available, see the tags on this repository.


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npm i @saimulhasnain-dev/input-validator

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