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Master class instantiation with the new operator to create objects from ES6 classes for cleaner object-oriented JavaScript code.

Initialize class instances properly in constructors with validation, computed properties, and setup logic for robust objects.

Handle constructor parameters elegantly with destructuring, default values, and rest operators for flexible class initialization.

Call parent constructors with super() in derived classes to properly initialize inheritance chains and access parent functionality.

Calculate property values dynamically with getters that compute results from other properties when accessed.

Control property access with getters and setters that look like regular properties but execute custom logic on access.

Enforce data integrity with setter validation that checks and sanitizes values before allowing property updates.

How constructor chaining enables proper initialization through inheritance hierarchies using super() to pass parameters up.

Use extends keyword to create class hierarchies with inheritance, enabling code reuse and polymorphism in object-oriented JavaScript.

How method override enables subclasses to replace or extend parent behavior, supporting polymorphism and flexible inheritance.