@wessberg/typedetector

TypeDetector

A class that holds a few simple predicate functions for detecting the native type of input.

Installation

Simply do: npm install @wessberg/typedetector.

Usage

const typeDetector = new TypeDetector();
if (typeDetector.isFunction(something)) {
	// something is typed as a function in here.
	something(arg);
}
const set1 = new Set([1, 2, 3]);
const set2 = new Set([3, 2, 1]);
const set3 = set1;
typeDetector.isEqual(set1, set2); // returns true, their contents are the same.
typeDetector.isEqual(set1, set3); // returns true, by referential equality.

The library only covers a few of the built-in types since instanceof checks covers the rest. But, for things such as strings, numbers and booleans, the predicates will be truthy if their object wrapper types is also used, e.g.:

typeDetector.isNumber(new Number(2)) // returns true

Changelog:

v1.0.1:

• A few updates in the README.

v1.0.0:

• First release. Contains a few methods for things that traditional instanceof checks doesn't cover.