Sensible / unsurprising JavaScript type detection and comparison using a
combination of ({}).toString and constructors.
var Type = require('type-of-is');
Type.of(obj); // returns constructor type of an object
Type.string(obj); // provides type as String
Type.is(obj, type); // tests whether obj is of type (constructor or
String)
Type.instance(obj, type); // wrapper of "obj instanceof type"
// following all evaluate to true
Type.is({ x : 2 }, Object);
Type.is(function () {}, Function);
Type.is([1, 2, 3], Array);
Type.is("barf", String);
Type.is(true, Boolean);
Type.is(10, Number);
Type.is(new Date(), Date);
Type.is(/abc/, RegExp);
Type.is(new Error("barf!"), Error);
function Person (name) {
this.name = name;
}
var ralph = new Person('Ralph');
Type.of(ralph); // [Function: Person]
Type.is(ralph, Person); // true
Type.is(ralph, Object); // false
Type.instance(ralph, Person); // true
Type.instance(ralph, Object); // true
https://github.com/stephenhandley/type-of-is
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