JavaScript: Class.method vs. Class.prototype.method

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A method defined directly on the class itself is called a static method. Static methods are accessed and called without instantiating the class. They are typically used for utility functions that pertain to the class but not to any specific instance of the class.

Syntax and Example

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

Use Cases

Utility Functions: Methods that perform operations related to the class but do not require data from specific instances.

Factory Methods: Functions that create and return new instances of the class.

Constants or Configuration: Methods that provide access to class-level constants or configuration settings.

Characteristics

Not inherited by instances: Static methods are not available to instances of the class.

Belong to the class: They are called on the class itself, not on instances.

A method defined on the class's prototype is an instance method. Instance methods are available to all instances of the class and typically operate on data contained within those instances.

Syntax and Example

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

Use Cases

Instance-Specific Behavior: Methods that operate on or require data from specific instances.

Shared Behavior: Methods that should be shared among all instances of a class.

Inheritance: Methods that need to be available for subclasses and instances of those subclasses.

Characteristics

Inherited by instances: Instance methods are available to all instances of the class.

Belong to the prototype: They are defined on the class's prototype object, making them part of the prototype chain.

Key Differences

Access:

Inheritance:

Use Case:

Performance:

Conclusion

Understanding these distinctions helps in writing clear, efficient, and maintainable JavaScript code, leveraging the power of object-oriented programming effectively.