Optional Chaining in JavaScript returns undefined instead of null when the variable to be tested is null

So, I am reading optional chaining in JavaScript and a question popped into my head.

Consider the code below:

let person = null
let street = person?.street // returns undefined

My question is that, if the variable person is null to begin with, then why is doing optional chaining result to setting the variable as undefined and not null?

If the person was undefined, then I guess, for me, setting it to undefined is reasonable because the variable is of course undefined, like the below:

let person
let street = person?.street // returns undefined

PS: I'm sorry if this is a stupid question, I'll delete it if someone agrees. :)

PPS: If this question is duplicated, pls drop the link and I'll give it a go. Thank you, very much.

Via Active questions tagged javascript - Stack Overflow https://ift.tt/bfmuyjz

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