Web Reference: Class Inheritance To create a class inheritance, use the extends keyword. A class created with a class inheritance inherits all the methods from another class: Nov 22, 2025 · Although classes are now widely adopted and have become a new paradigm in JavaScript, classes do not bring a new inheritance pattern. While classes abstract most of the prototypal mechanism away, understanding how prototypes work under the hood is still useful. JavaScript uses prototype based inheritance. Every object has a prototype, and when a method of the object is called then JavaScript tries to find the right function to execute from the prototype object.
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