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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.

Simplify your code and improve testability by minimizing function arguments. Discover how fewer arguments enhance readability and maintainability.

Follow best practices and adhere to the single responsibility principle by not using flags as function parameters. Improve code comprehension and modularity.

Say what the function does with its name. The name should tell you what it expects as inputs as well.