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Chain of Responsibilitybehavioral
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Prototypecreational
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Criteria	behavioralChain of ResponsibilityView pattern	creationalPrototypeView pattern
Basics
Category	behavioral	creational
Summary	Pass a request through a sequence of handlers until one handles it or the chain ends.	—
Intent	Pass requests along a chain of handlers until one of them handles the request or the request reaches the end of the chain.	Specify the kinds of objects to create using a prototypical instance, and create new objects by cloning that prototype.
Decision factors
Problem	A request must pass through multiple possible handlers, but the sender should not need to know which handler will process it.	Creating new objects from scratch can be expensive or repetitive when the system needs many similar variants.
Tradeoffs	Requests can become harder to trace because control flows through multiple handlers. A long chain may add overhead if many handlers are checked on every request. It keeps handler logic isolated and easier to extend.	Can be difficult if the object graph contains deep references that need custom clone behavior May require careful handling of mutable state to avoid shared-reference bugs
Practical fit
Languages	typescript java python angular react react-native csharp dotnet	typescript java python angular react react-native csharp dotnet
Platforms	frontend backend integration	Web Backend Mobile UI kits Cross-platform systems
Integration notes	Chain of Responsibility is useful for validation pipelines, support routing, approval flows, and any system where requests may be processed by different handlers in sequence.	Prototype is useful when object creation is expensive, when many near-identical objects are needed, or when cloning preconfigured templates is simpler than rebuilding them.