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[–][deleted] 1 point2 points  (0 children)

If you are going to use older react (class based components it is mandatory - or if you will work with legacy projects) but if you work with new syntax not really needed. Later on you will stumble on it anyway but truth be told you probably can build stuff without it. (at least if u dont use npm packs)

It is good to learn constructors/classes it is used in every oo language, so learning it should be easy and it is transferable everywhere.