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1000+ packages found

Another JSON Schema Validator

published version 8.17.1, 9 months ago13526 dependents licensed under $MIT
574,823,088

Format validation for Ajv v7+

published version 3.0.1, a year ago2207 dependents licensed under $MIT
130,988,834

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

published version 3.1.0, 5 months ago907 dependents licensed under $MIT
154,012,116

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

published version 3.0.4, 7 years ago1154 dependents licensed under $Apache-2.0
108,132,310

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

published version 3.24.3, 10 days ago26457 dependents licensed under $MIT
106,541,828

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

published version 1.0.0, 9 years ago676 dependents licensed under $MIT
122,128,144

Type check values

published version 7.0.1, 8 months ago336 dependents licensed under $MIT
90,444,741

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

published version 6.0.0, 7 months ago2981 dependents licensed under $ISC
74,193,624

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

published version 10.0.1, 7 months ago407 dependents licensed under $MIT
80,893,256

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

published version 2.2.0, 6 years ago574 dependents licensed under $MIT
91,779,716

Object schema validation

published version 17.13.3, 10 months ago12980 dependents licensed under $BSD-3-Clause
47,358,914

String validation and sanitization

published version 13.15.0, a month ago7310 dependents licensed under $MIT
59,196,633

An object schema merger/validator

published version 2.1.6, 3 months ago44 dependents licensed under $Apache-2.0
57,161,852

Performant, flexible and extensible forms library for React Hooks

published version 7.56.1, 4 days ago6558 dependents licensed under $MIT
47,021,426

Email address and domain validation

published version 5.0.0, 3 years ago17 dependents licensed under $BSD-3-Clause
41,524,838

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

published version 5.0.1, 25 days ago2552 dependents licensed under $MIT
34,292,832

Wrap zod validation errors in user-friendly readable messages

published version 3.4.0, 7 months ago482 dependents licensed under $MIT
15,923,865

A fast and easy to use JSON Schema validator

published version 1.5.0, 4 months ago2630 dependents licensed under $MIT
15,042,904

Ajv class for JSON Schema draft-04

published version 1.0.0, 4 years ago81 dependents licensed under $MIT
16,737,009

A simple and composable way to validate data in JavaScript (and TypeScript).

published version 2.0.2, 10 months ago745 dependents licensed under $MIT
9,818,739