https://tekos.net/articles/software-development/observer-design-pattern-an-overview/
Observer Design Pattern: An Overview Tekos Interactive
Aug 7, 2024 - The Observer Design Pattern is a powerful way to create loosely coupled systems that are highly modular and extensible.
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https://www.mermaideditor.io/templates/database-design/design-pattern-class-hierarchy
Observer Design Pattern - Mermaid Diagram Template | Mermaid Editor
Class diagram showing the Observer pattern with EventEmitter, subscribers, and typed event handling.
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https://webdevetc.com/blog/observer-design-pattern-in-php/
PHP Observer Design Pattern - Web dev etc - my software development blog
Software development articles (Laravel, Vue, PHP, Javascript, Typescript)
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