es-to-primitive
ECMAScript “ToPrimitive” algorithm. Provides ES5 and ES2015 versions.
kind-of
Get the native type of a value.
typical
Isomorphic, functional type-checking for Javascript
boolbase
two functions: One that returns true, one that returns false
is-boolean-object
Is this value a JS Boolean? This module works cross-realm/iframe, and despite ES6 @@toStringTag.