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Learn about the Open-Closed Principle (OCP) and its benefits. Extend functionality without modifying code, ensuring maintainability and reusability.

Each class should have a single responsibility. That means that there should be only one reason to change it. This is one of the SOLID principles.

Discover how the Dependency Inversion Principle improves code maintainability and modularity by relying on abstractions and inverting control of dependencies.

Trying to optimize your code is a waste of time in some cases. Modern browsers do a lot of optimizations at runtime.

Using getters and setters is better than accessing the object property directly. Accessing properties directly breaks encapsulation.