Awesome

@tool-belt/type-predicates

Installation

npm install @tool-belt/type-predicates

Contents

This package includes the following:

• a comprehensive collection of performant and flexible type-guards, that can function as a drop-in replacement for the type-guards included in the NodeJS builtin utils/types module - with better significantly typing.
• a comprehensive collection of type assertions covering all type-guards included in the package.
• isUnion, createTypeGuard and createTypeAssertion utilities for the composition of type-guards and assertions.
• supports ES modules and tree shaking, i.e., works great with module bundlers such as Webpack for the browser.

See the docs for details.