Validates your environment variables are set at runtime.

A pact between your env schema and your .env — validate, generate .env.example, detect drift.

Offers getProxyForUrl to get the proxy URL for a URL, respecting the *_PROXY (e.g. HTTP_PROXY) and NO_PROXY environment variables.

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

✅ Vite plugin for validating your environment variables

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

TypeScript definitions for validate-npm-package-name

babel plugin that emulates vite's import.meta.env functionality

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

Check if a buffer contains valid UTF-8

Email address and domain validation

Loosely validate an event.

Email address and domain validation

User validations for npm

A JavaScript implementation of a extendable, fully compliant JSON Schema validator.

A Babel preset for each environment.

Offline HTML5 validator and linter

Runtime agnostic JS utils

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

Validate identifier/keywords name