Does node.js shell have commands like python type?

Question

I want to know whether a object is null or undefined so I use the following code:

if(obj==='undefined'||obj===null)

But it doesn't seem to work. Is there similar python type command to get the type of obj in node.js shell? Thanks!

Answer 1

> typeof foo == 'undefined'
true
> typeof 1 == 'number'
true

This should work for you:

if( typeof obj === 'undefined' || obj === null)

From docs:

The typeof operator returns a string indicating the type of the unevaluated operand.