What exacly do " ?. " , i wanna know

in some videos like " Sequence, Selection, Iteration" or anothers i see the “?.” but i dont know what exacly does, i search “?. javascript” in google but dont find anything, anyone can help me ?

Thanks :smiley:

Optional chaining. Read the overview and motivation in the document https://github.com/tc39/proposal-optional-chaining.

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i like it, i go to use that in my javascript proyects now :slight_smile: :heart: i apreciate it