Dynamic Inheritance in JavaScript Classes: Using Function.prototype.call Explained

---

If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com.
---
Understanding Dynamic Inheritance with JavaScript Classes

Here's an example to illustrate our dilemma. Let's say we have a Person class defined as follows:

[[See Video to Reveal this Text or Code Snippet]]

Now, you might want to define a Police class that inherits from Person using the following code:

[[See Video to Reveal this Text or Code Snippet]]

Why Doesn't This Work?

[[See Video to Reveal this Text or Code Snippet]]

In simple terms, JavaScript classes standardize object construction, which means that using traditional function invocation methods (like call) won't work for them.

The Solution: Using Factory Functions for Dynamic Inheritance

Step-by-Step Implementation

Define the Base Class: We start with our basic Person class.

[[See Video to Reveal this Text or Code Snippet]]

Create a Factory Function: This function will return a new class that extends the base class we provide as an argument.

[[See Video to Reveal this Text or Code Snippet]]

Create an Extended Class: Use the factory function to create the Police class based on Person.

[[See Video to Reveal this Text or Code Snippet]]

Instantiate the New Class: Finally, you can create instances and leverage the parent properties and methods.

[[See Video to Reveal this Text or Code Snippet]]

Benefits of This Approach

Dynamic Flexibility: This method allows you to create variations of the police class as needed.

Standard Compliant: You fully utilize JavaScript's class structure without falling into the pitfalls of older function-based inheritance.

Enhanced Readability: The syntax is more modern and adheres to object-oriented principles.

Conclusion

With this solution, you can enhance your applications and leverage the full potential of JavaScript's class-based inheritance model. Happy coding!