JavaScript Refined

Function and Object, instances of each other

Explaining why Function is an instance of Object, and why Object is an instance of Function

NaN and typeof

An in-depth look at the NaN property, and why it is considered a number type

First, NaN is not a keyword (unlike true, false, null, etc..), it is a property of the global object. The value of NaN is the same as the value of…

Null and typeof

Demystifying typeof null, once and for all

The typeof operator can be a little counter-intuitive. However, regardless of the confusion it may cause, the way it works is extremely straightforward: return the type string of a given reference…