Check if a buffer contains valid UTF-8

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

Offline HTML5 validator and linter

Email address and domain validation

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

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

Email address and domain validation

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

validate form asynchronous

Loosely validate an event.

Validates if a value is an array.

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

Validates if a value is a function.

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

Validates if a value is an integer array.

Validates if a value is an integer.

User validations for npm

Validates if a value is a number.

remark plugin to validate links to headings and files