Validation

Another JSON Schema Validator

webpack Validation Utils

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

Returns true if a value has the characteristics of a valid JavaScript accessor descriptor.

Returns true if a value has the characteristics of a valid JavaScript data descriptor.

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

Validate identifier/keywords name

Additional JSON-Schema keywords for Ajv JSON validator

Get and validate the raw body of a readable stream.

Validate plugin/preset options

Regular expression parser for ECMAScript.

A ridiculously light-weight argument validator (now browser friendly)

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

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

JSON Schema validation and specifications

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

Parse, validate, manipulate, and display dates

Compile objects with duplicate keys to valid strict ES5

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

Runtime validation and processing of JavaScript types

An object schema merger/validator

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

Extremely fast HTTP Archive (HAR) validator using JSON Schema

Parse yes/no like values

Type check values

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

Format validation for Ajv v7+

JSONSchema Type Builder with Static Type Resolution for TypeScript

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

Regular expression for matching IP addresses (IPv4 & IPv6)

Custom error messages in JSON Schemas for Ajv validator

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

String validation and sanitization

Object schema validation

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

Lint files staged by git

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

Email address and domain validation

The thing npm uses to read package.json files with semantics and defaults and validation

Validate a webpack configuration.

Dead simple Object schema validation

Object schema validation

Email address and domain validation

Convert a string to a valid safe filename

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

Isomorphic, functional type-checking for Javascript

Performant, flexible and extensible forms library for React Hooks

Convert an argument into a valid iterator. Based on the `.makeIterator()` implementation in mout https://github.com/mout/mout.

TypeScript definitions for validator.js

URI validation functions