mjml-validator

No-dependencies, low-level, high-performance JIT code generation package for JavaScript

An implementation of the WHATWG URL Standard's URL API and parsing machinery

Headless calendar library by the makers of FullCalendar

Detect whether a terminal supports color

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

Wrap zod validation errors in user-friendly readable messages

General purpose validation library for JavaScript

An object schema merger/validator

Minimal lightweight logging for JavaScript, adding reliable log level methods to any available console.log methods

An mutable object-based log format designed for chaining & objectMode streams.

Architect project resource enumeration utility

A public domain JSON Schema validator for JavaScript

Runtime validation and processing of JavaScript types

This package provides utilities for creating schema for different types, along with serialization information.

Schema/draft model layer for settings editors: rehydrates a serialized schemastery schema, validates drafts, and edits them immutably by path

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

Validates mint.json files

A list of all CSS color keywords.

Decorator-based property validation for classes.