npm package discovery and stats viewer.

Discover Tips

  • General search

    [free text search, go nuts!]

  • Package details

    pkg:[package-name]

  • User packages

    @[username]

Sponsor

Optimize Toolset

I’ve always been into building performant and accessible sites, but lately I’ve been taking it extremely seriously. So much so that I’ve been building a tool to help me optimize and monitor the sites that I build to make sure that I’m making an attempt to offer the best experience to those who visit them. If you’re into performant, accessible and SEO friendly sites, you might like it too! You can check it out at Optimize Toolset.

About

Hi, 👋, I’m Ryan Hefner  and I built this site for me, and you! The goal of this site was to provide an easy way for me to check the stats on my npm packages, both for prioritizing issues and updates, and to give me a little kick in the pants to keep up on stuff.

As I was building it, I realized that I was actually using the tool to build the tool, and figured I might as well put this out there and hopefully others will find it to be a fast and useful way to search and browse npm packages as I have.

If you’re interested in other things I’m working on, follow me on Twitter or check out the open source projects I’ve been publishing on GitHub.

I am also working on a Twitter bot for this site to tweet the most popular, newest, random packages from npm. Please follow that account now and it will start sending out packages soon–ish.

Open Software & Tools

This site wouldn’t be possible without the immense generosity and tireless efforts from the people who make contributions to the world and share their work via open source initiatives. Thank you 🙏

© 2024 – Pkg Stats / Ryan Hefner

js-string-validator

v2.0.0

Published

JS String validator utility class

Downloads

3

Readme

js-string-validator

Script Validator

JavaScript String validator utility class. Based on the builder pattern, this class will all you to validate the given string for user defined criteria.

Add to your application

Get the package from here

npm i js-string-validator

How to use

  • Basic usage

const StringValidator = require('js-string-validator');
  
let validator = new StringValidator('some string');

let isValidString = validator.min(0).max(20).regex(/\s+/).includes('string').validate();

console.log(isValidString);
// true -> string obey all criteria

console.log(validator.validate());
// true -> valid string without any criteria

validator = new StringValidator();

console.log(validator.validate());
// false -> Not a valid string
  • Builder

Create a template (validator function) for re-usability

const StringValidatorBuilder = require('js-string-validator/builder');
  
const validator = StringValidatorBuilder().min(0).max(20).regex(/\s+/).includes('string').build();

console.log(validator('some string'));
// true  -> string obeys the pattern

console.log(validator('random'));
// false -> string violates the pattern

console.log(validator());
// false -> undefined not allowed

API specification

  • Basic usage

Following methods can be linked to validate a given string

| Method | Definition |Usage | Example | |---|---|---|---| |constructor| new StringValidator(value) ; value: string \| null \| undefined | Initialize the validator with value to be validated. | new StringValidator()| | length | length(number) ; number : any | Validate the length of the string. Validation is skipped if number not 0 or +. | validator.length(1).validate()| | max | max(number) ; number : any | Validate the max length of the string. Validation is skipped if number is not 0 or +. | validator.max(10).validate()| | min | min(number) ; number : any | Validate the min length of the string. Validation is skipped if number is not 0 or +. | validator.min(0).validate()| | regex | regex(regexPattern) ; regexPattern : any | Validate for the string for given regexPattern. Validation is skipped if the pattern is not a regex | validator.regex(/[0-9a-zA-Z]+/).validate()| | includes | includes(subString) ; subString: any | Validate if subString includes in the string. Validation is skipped if the subString is undefined | validator.includes('test').validate()| | allow | allow(allowedValue) ; allowedValue: any | Validate true if constructed with allowedValue| validator.allow(undefined).validate()| | validate | validate() | Validate the given string with given criteria | validator.max(10).min(0).validate()|

  • Builder

Builder API will allow creation of a template for String validation.

length, max, regex, includes, allow can be used to build a template (combine these methods in any form suits).

Use build() to generate a validator function.

StringValidatorBuilder().length(number).max(number).min(number).regex(regexPattern).includes(subString).allow(allowedValue).build();