utility functions to check primitive types using typeof
Detects precise type of objects like `Array()`, `new Number(1)`, `new Boolean(true)`, etc
Flexible data validation using a ducktype interface. For JavaScript and Node.js.
A tiny component to detect a variable type. Node/Browser
ES6 spec-compliant Function.prototype.name sham.
A more explicit improvement on typeof
Runtime type checking for JavaScript
A data validation library for Node.js and browser
Isomorphic, functional type-checking for Javascript
JavaScript-oriented utilities for functional programming
A feature detection library for ECMAScript in node.js and browser.
minimal composable type abstraction
Just a reasonable `typeof`
Test whether a value has in its prototype chain a specified constructor as a prototype property.
Type checking from node core.
The ultimate library for getting false.