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

The semantic version parser used by npm.

A small lib to validate IP addresses.

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

Returns true if a value is a valid instance of Base.

Checks if the geometry is a valid according to the OGC Simple Feature Specification.

Validate domain name

Validate hostname based on RFC-1123

Convert a string to a valid safe filename

This is a simple module to validate IP address, check ip address version, check if ip is within a range.

Check if a string is a valid filename

A library for validating credit card fields

Check that a git reference name is well formed

Minimal web-style fetch TypeScript typings

ESLint parser that allows for linting of experimental syntax transformed by Babel

Given some data, jsesc returns the shortest possible stringified & ASCII-safe representation of that data.

JSON.parse with bigints support

Library to work against complex domain names, subdomains and URIs. Only contains ICANN section.

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

Validates custom element names according to the custom elements spec