typeof is an operator that is used to identify the type of any object in javascript. It returns a value that is string. So you can compare any string value from returned value of typeof. // Examples ...

An extended Javascript object type getter. JSMicro TypeOf will allow us to register our own object type. Permission is hereby granted, free of charge, to any person obtaining a copy of this software ...

The production _UnaryExpression_ : `typeof` _UnaryExpression_ is evaluated as follows: 1. Let _val_ be the result of evaluating _UnaryExpression_. 2. If [Type][2 ...