When creating a class in JavaScript, which of the following is autogenerated?

When you create a class in JavaScript, a constructor is automatically generated. This constructor is a special method used for initializing newly created objects. If a class does not explicitly define a constructor, JavaScript provides a default constructor that does not take any parameters and includes no logic, allowing instances of that class to be instantiated without requiring additional code.

The constructor is essential because it sets up the initial state of the object by defining properties. If you provide a custom constructor in your class, it will override the autogenerated one, allowing you to implement specific behavior during object creation.

In contrast, the prototype is an object where properties and methods can be added, but it is not autogenerated in the same way as the constructor; rather, it is an inherent feature of JavaScript functions and classes that enables inheritance. Functions are general building blocks in JavaScript and are not specifically linked to class creation in terms of being autogenerated. Extension, while relevant to object-oriented programming concepts, does not pertain to the automatic processes involved in JavaScript class creation.