generate-strings

Generate random strings, strings with mask and strength passwords

generate-strings is a string generator that build random strings, strings with mask and passwords with password-strength tester. It is lightweight, extensible, has no dependencies, typescript support and can be used on the server with NodeJS or in-browser with JS.

Installing

Server-side (NodeJS)

From the command line:

npm install generate-strings --save

or

yarn add generate-strings

In-browser

Within your document (each one for the desired function)

<script src="generateRandomString.min.js"></script>
<script src="generateRandomStringWithMask.min.js"></script>
<script src="generateRandomPassword.min.js"></script>

or

<script src="generateStrings.min.js"></script>

Features

1. Generate random strings:

',9nlg4^]'

2. Generate strings with mask:

'@#$%-@#$%-@#$%-@#$%' = 'Aa!0-Aa!0-Aa!0-Aa!0'

3. Generate passwords with password-strength tester:

{ password: '2dt4hKIPO*=He', strength: 'high' }

Usage

After you've included it into your project, using the module is straightforward:

generateRandomString(options)

generateRandomStringWithMask(options)

generateRandomPassword(options)

Server-side

// require the module
const {
   generateRandomString,
   generateRandomStringWithMask,
   generateRandomPassword,
} = require('generate-strings');

console.log(generateRandomString());
console.log(generateRandomStringWithMask());
console.log(generateRandomPassword());

In-browser

// in the browser, including the script will make the function available.
console.log(generateRandomString());
console.log(generateRandomStringWithMask());
console.log(generateRandomPassword());

Configuring

The module may be configured as follows: OBS: The settings shown below are the defaults.

import { generateRandomString } from 'generate-strings';

// and then:
const randomString = generateRandomString();

Available options for generateRandomString

Name	Type	Description	Default value	Allowed values
stringLength	Integer	Size of the string that will be generated	8	0-Number.MAX_SAFE_INTEGER
upperCase	Boolean	Determines whether it will be generated	true	true, false
upperCaseCharacters	String	UpperCase letters to be generated	'ABCDEFGHIJKLMNOPQRSTUVWXYZ'	'A-Z'
lowerCase	Boolean	Determines whether it will be generated	true	true, false
lowerCaseCharacters	String	LowerCase letters to be generated	'abcdefghijklmnopqrstuvwxyz'	'a-z'
special	Boolean	Determines whether it will be generated	false	true, false
specialCharacters	String	Special letters to be generated	'!@#$%&*()=[]{}'	All special characters
number	Boolean	Determines whether it will be generated	true	true, false
numberCharacters	String	Numbers to be generated	'0123456789'	0-9

Available options for generateRandomStringWithMask

Name	Type	Description	Default value	Allowed values
mask	String	String mask that will be generated	'@#$%-@#$%-@#$%-@#$%'	*
upperCaseCharacters	String	UpperCase letters to be generated	'ABCDEFGHIJKLMNOPQRSTUVWXYZ'	'A-Z'
lowerCaseCharacters	String	LowerCase letters to be generated	'abcdefghijklmnopqrstuvwxyz'	'a-z'
specialCharacters	String	Special letters to be generated	'!@#$%&*()=[]{}'	All special characters
numberCharacters	String	Numbers to be generated	'0123456789'	0-9
upperCaseMask	String	Letter that will be replaced to a upperCase char	'@'	'*'
lowerCaseMask	String	Letter that will be replaced to a lowerCase char	'#'	'*'
specialMask	String	Letter that will be replaced to a special char	'$'	'*'
numberMask	String	Letter that will be replaced to a number	'%'	'*'

Available options for generateRandomPassword

Name	Type	Description	Default value	Allowed values
passwordLength	Integer	Size of the strings that will be generated	8	0-Number.MAX_SAFE_INTEGER
showStrength	Boolean	Shows the password strength	false	true, false
excludeEqualChars	Boolean	Excludes characters that are consecutive equals	false	true, false
firstCharType	String	Determines the type of first character	'random'	'random', 'upperCase', 'lowerCase', 'special', 'number'
upperCase	Boolean	Determines whether it will be generated	true	true, false
upperCaseCharacters	String	UpperCase letters to be generated	'ABCDEFGHIJKLMNOPQRSTUVWXYZ'	'A-Z'
lowerCase	Boolean	Determines whether it will be generated	true	true, false
lowerCaseCharacters	String	LowerCase letters to be generated	'abcdefghijklmnopqrstuvwxyz'	'a-z'
special	Boolean	Determines whether it will be generated	false	true, false
specialCharacters	String	Special letters to be generated	'!@#$%&*()=[]{}'	All special characters
number	Boolean	Determines whether it will be generated	true	true, false
numberCharacters	String	Numbers to be generated	'0123456789'	0-9

Examples

import {
   generateRandomString,
   generateRandomStringProps,
} from 'generate-strings';

const settings: generateRandomStringProps = {
   stringLength: 15,
   special: true,
};

const randomStringWithMask = generateRandomString(settings); // will return a string like: bov$Ia@}Rr8gzU*

import {
   generateRandomStringWithMask,
   generateRandomStringWithMaskProps,
} from 'generate-strings';

const settings: generateRandomStringWithMaskProps = {
   upperCaseMask: '&',
   mask: '####_####[e-mail]',
};

const randomStringWithMask = generateRandomStringWithMask(settings); // will return a string like: [e-mail]

import {
   generateRandomPassword,
   generateRandomPasswordProps,
} from 'generate-strings';

const settings: generateRandomPasswordProps = {
   passwordLength: 12,
   special: true,
   showStrength: true,
   excludeEqualChars: true,
};

const randomPassword = generateRandomPassword(settings); // will return a object like: { password: 'T2$he{Yk6pvf', strength: 'high' }

Testing

To test the application, run yarn test. You may first need to run yarn to install the required development dependencies. (These dependencies are not required in a production environment, and facilitate only unit testing.)