Bubble Foundry

typeof null // -> object
null instanceof null // -> TypeError: Can't use instanceof on a non-object.
true instanceof Boolean // -> false
true == new Boolean(true) // -> true
true === new Boolean(true) // -> false

Needless to say, this is very annoying if you’re trying to be be careful with your types and just goes to show that not everything is an object in Javascript. Come back soon for my attempt at a solution.

From the Mozilla Javascript Glossary:

primitive, primitive value
A data that is not an object and does not have any methods. JavaScript has 5 primitive datatypes: string, number, boolean, null, undefined. With the exception of null and undefined, all primitives values have object equivalents which wrap around the primitive values, e.g. a String object wraps around a string primitive. All primitives are immutable.

Did you know that all Javascript primatives are immutable? I sure didn’t.