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validator
Advanced tools
The validator npm package is a library of string validators and sanitizers. It provides a variety of functions to validate and sanitize strings, such as checking if a string is in a certain format (e.g., email, URL) or transforming strings to ensure they are safe for use in different contexts.
Email Validation
Checks if the input string is an email.
const validator = require('validator');
console.log(validator.isEmail('test@example.com')); // true
URL Validation
Checks if the input string is a URL.
const validator = require('validator');
console.log(validator.isURL('https://www.example.com')); // true
Sanitizing Strings
Escapes HTML characters in the input string to prevent XSS attacks.
const validator = require('validator');
console.log(validator.escape('<script>alert("xss")</script>')); // '<script>alert("xss")</script>'
Checking String Length
Checks if the input string's length falls within a specified range.
const validator = require('validator');
console.log(validator.isLength('Hello', {min: 2, max: 10})); // true
Blacklisting Characters
Removes specified characters from the input string.
const validator = require('validator');
console.log(validator.blacklist('abc123', '123')); // 'abc'
Joi is a powerful schema description language and data validator for JavaScript. It allows for a more detailed and structured validation process compared to validator, including the ability to create custom validation schemas.
Yup is a JavaScript schema builder for value parsing and validation. It uses a schema-based approach similar to Joi and can be integrated with form libraries like Formik. It is more focused on object schema validation.
Class-validator works with classes and decorators to validate that the properties of an object conform to specified rules. It is typically used with TypeScript and integrates well with class-based frameworks like TypeORM.
Express-validator is a set of express.js middlewares that wraps validator.js functions. It is specifically designed for use with the Express web application framework and allows for easy integration of validation into the request processing pipeline.
FAQs
String validation and sanitization
The npm package validator receives a total of 9,812,506 weekly downloads. As such, validator popularity was classified as popular.
We found that validator demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 2 open source maintainers collaborating on the project.
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