URL details: piranna.github.io/2021/07/08/Abstract-classes-in-Javascript/

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URL title: Abstract classes in Javascript – Jesús Leganés-Combarro 'piranna' – To do what anyone can do, leave it to anyone else
URL description: Javascript don’t have the concept of abstract classes, but it’s fairly easy to implement: don’t allow to instanciate them :-) Just check if the constructor of the instance we are creating is the own class instead of one of its childrens, and don’t throw an error if it is:
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