How does JavaScript's prototype model relate to class syntax?

Relates JavaScript classes to prototype-based delegation while preserving the useful semantics class syntax adds.

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JavaScript objects delegate property lookup through a prototype chain. Class syntax provides a clearer way to define a constructor, instance methods, static members, inheritance, and private fields, but instances still use prototypes for inherited methods. A method declared in a class body is normally shared through the class's prototype rather than copied onto every instance.

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A practical object-model explanation that avoids both classical-inheritance assumptions and the dismissive 'just syntax sugar' shortcut.

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Classes are a standard way to define constructors and shared methods, but property lookup still follows JavaScript's prototype chain.
JavaScript objects delegate property lookup through a prototype chain. Class syntax provides a clearer way to define a constructor, instance methods, static members, inheritance, and private fields, but instances still use prototypes for inherited methods. A method declared in a class body is normally shared through the class's prototype rather than copied onto every instance.
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When order.total() runs, JavaScript first looks for total on the instance and then follows its prototype chain. extends links the derived constructor and prototype to the base class structures, while follows those relationships. I usually use classes when identity, lifecycle, and shared behavior form a coherent model; plain objects and functions are often simpler for data transformation or composition.

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Describing JavaScript classes as unrelated to prototypes.
Claiming each instance receives a copied class method.
Treating class as purely cosmetic and ignoring its semantics.
Using inheritance for every form of code reuse.

How does JavaScript's prototype model relate to class syntax?

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