Prototypes and Prototypal Inheritance in JavaScript


  In JavaScript, all objects have an internal property called prototype that allows objects to inherit properties and methods from other objects.


Syntax:


  You can create an object using a constructor function, then add methods to its prototype.

  • Define a prototype method:

    Object.prototype.method = function() ❴ ❵


  • Create an instance:

    const instance = new Object();



Purpose:


  Prototypal inheritance allows objects to share behaviors and properties, which facilitates code reuse.



Exercises



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How do you define a method on the prototype of a constructor in JavaScript?



JavaScript Concepts and Reference

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