Validation

simple validation functions

Another JSON Schema Validator

Wrap zod validation errors in user-friendly readable messages

webpack Validation Utils

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

Validate identifier/keywords name

Additional JSON-Schema keywords for Ajv JSON validator

Validate plugin/preset options

Get and validate the raw body of a readable stream.

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

Json Schema Type Builder with Static Type Resolution for 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

Format validation for Ajv v7+

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

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.

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

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

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

An object schema merger/validator

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

General purpose validation library for JavaScript

Parse yes/no like values

Compile objects with duplicate keys to valid strict ES5

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

JSON Schema validation and specifications

Parse, validate, manipulate, and display dates

Express middleware to validate request (headers, params, query, body) using Joi

Type check values

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

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

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

An internal Lerna tool

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

Regular expression parser for ECMAScript.

An object schema merger/validator

Extremely fast HTTP Archive (HAR) validator using JSON Schema

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

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

Runtime validation and processing of JavaScript types

String validation and sanitization

Runtime library to validate data against TypeScript interfaces

Lint files staged by git

Hash a stream of data, then validate

Performant, flexible and extensible forms library for React Hooks

Object schema validation

Email address and domain validation

Node validation utility functions for Docusaurus packages.