Can JavaScript do multiple inheritance?
Not directly (each object has one prototype). But you can simulate it with composition: Object.assign(obj, mixin1, mixin2). This copies properties from multiple sources. Mixins are the JS way to achieve multiple inheritance-like behavior.
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More FAQs in Prototypal vs Classical Inheritance
Classical: classes inherit from classes (static, strict, compile-time). Prototypal: objects inherit from objects (dynamic, flexible, runtime). JS uses prototypal. ES6 classes are syntactic sugar over prototypes.
Yes. Use Object.setPrototypeOf(obj, newProto). This is possible because JS uses prototypal inheritance (dynamic). In classical inheritance, the hierarchy is fixed at compile time.
Composition is often preferred. Instead of deep inheritance chains, mix objects: Object.assign(bird, canFly, canSwim). This is more flexible and avoids the problems of deep inheritance (fragile base class, tight coupling).
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