Improve typeof undefined docs
#42207
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I agree with the idea, but I can only review or merge after you make it ready for review. |
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@Josh-Cena thanks, I've marked as ready for review. |
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Description
Clarify how lexical declarations interact with
typeof undefinedchecks when not initialized.Motivation
The current docs on
undefinedaren't clear about the fact that variables created withletandconstwill throw aReferenceErrorif they're compared usingtypeof undefinedbefore initialization.