javascript: what is typeof typeof

typeof

If you’ve ever heard about typeof operator in javascript than, how about those few questions:

  1. what is typeof typeof ‘string’ ?
  2. what is typeof typeof?

Answers

The first one is “string”. Yes if there you have the following code:

typeof something_undefined

that gives of course undefined, but if there is typeof typeof something_undefined the answer is string, because “udefined” itself is a string.

The second question is simple javascript error, there is no case with typeof typeof only.

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