type-check
populartype-check allows you to check the types of JavaScript values at runtime with a Haskell like type syntax.
Updated by @gkz
typechecker
Utilities to get and check variable types (isString, isPlainObject, isRegExp, etc)
Updated by @balupton
email-regex-safe
Regular expression matching for email addresses. Maintained, configurable, more accurate, and browser-friendly alternative to email-regex. Works in Node v10.12.0+ and browsers. …
Updated by @niftylettuce
strong-type
allows easy type enforcement for all JS types objects and classes. it is also extensible and provides simple to use type checks for your own custom classes and types
Updated by @riaevangelist
@anchorchat/isemail
Validate an email address according to RFCs 5321, 5322, and others
Updated by @mitchelvanbever
zero-type
Fast, extensive and customizable type checking library. Deep object structures, specific values, options, and custom check functions. Compiles type validators into fast and small …
Updated by @dennisranish
is-any-type
is-any-type simple functionality alternative to check data type references such as typeof and instanceof
Updated by @restuwahyu13
@symbion/runtype
Runtime type system for TypeScript ==================================
Updated by @szilu
@sounisi5011/ts-utils-is-property-accessible
Check if a value is property accessible
Updated by @sounisi5011
you-are-not
Runtime type-checking written in TypeScript -- Not is a minimal, blazing fast, intuitive, API-centric, and customisable API payload sanitiser/type-checking/validation/error …
Updated by @calvintwr