Validation

simple validation functions

Wrap zod validation errors in user-friendly readable messages

Another JSON Schema Validator

TypeScript-first schema declaration and validation library with static type inference

Validate identifier/keywords name

Validate plugin/preset options

JWA, JWS, JWE, JWT, JWK, JWKS for Node.js, Browser, Cloudflare Workers, Deno, Bun, and other Web-interoperable runtimes

Pass two numbers, get a regex-compatible source string for matching ranges. Validated against more than 2.78 million test assertions.

Get and validate the raw body of a readable stream.

Format validation for Ajv v7+

A family of specs for interoperable TypeScript

Regular expression parser for ECMAScript.

A tool set for CSS: fast detailed parser (CSS → AST), walker (AST traversal), generator (AST → CSS) and lexer (validation and matching) based on specs and browser implementations

Error constructor for test and validation frameworks that implements standardized AssertionError specification.

Json Schema Type Builder with Static Type Resolution for TypeScript

An object schema merger/validator

webpack Validation Utils

Validates whether a string matches the production for an XML name or qualified name

Utilities for determining if characters belong to character classes defined by the XML specs.

A library for parsing IPv4 and IPv6 IP addresses in node and the browser.

Additional JSON-Schema keywords for Ajv JSON validator

Validate XML, Parse XML, Build XML without C/C++ based libraries

Type check values

JSON Schema validation and specifications

A lightweight, schema-first validation library for Scalar

Generic configuration validation tool that helps you with warnings, errors and deprecation messages as well as showing users examples of correct configuration.

Give me a string and I'll tell you if it's a valid npm package name

Check if a protocol requires a certain port number to be added to an URL.

Validates XML name productions — Name, NCName, QName, NMToken, NMTokens — for XML 1.0 and 1.1

Performant, flexible and extensible forms library for React Hooks

Runtime library to validate data against TypeScript interfaces

Parse yes/no like values

Compile objects with duplicate keys to valid strict ES5

Parse, validate, manipulate, and display dates

Give me a string and I'll tell you if it's a valid npm package license string

React Hook Form validation resolvers: Yup, Joi, Superstruct, Zod, Vest, Class Validator, io-ts, Nope, computed-types, TypeBox, arktype, Typanion, Effect-TS and VineJS

Returns true if a value has the characteristics of a valid JavaScript descriptor. Works for data descriptors and accessor descriptors.

Lint files staged by git

Zero-dependency, DOM-free, pure predicate for detecting unsafe strings across HTML, XML, SVG, SQL, SHELL, and REGEX contexts

An object schema merger/validator

Node validation utility functions for Docusaurus packages.

A function to check whether a prop is valid for HTML and SVG elements

String validation and sanitization

Object schema validation

The modular and type safe schema library for validating structural data

Validate that your components can safely be updated with Fast Refresh

General purpose validation library for JavaScript

Parse, validate, traverse, transform, and optimize Oniguruma regular expressions

A generational cache with strict entry-count limits and payload validation.

Excel Workbook Manager - Read and Write xlsx and csv Files.