Object-oriented programming structures software around objects that combine state and behavior. It is one of JavaScript’s major programming styles, alongside procedural and functional programming. TypeScript supplies useful structure for expressing object-oriented designs, while the underlying patterns remain transferable across languages. section 1.0
Object-oriented programming becomes especially relevant when code must manage dependencies or verify interactions between collaborating objects. Dependency injection and mock-based testing are common settings for this style, particularly for developers familiar with C# or Java. section 3.7 section 4.7
Choose the style according to the problem and the team rather than treating one paradigm as universally best:
- Use object-oriented designs when their structure fits the team’s experience or the dependency-management problem. section 3.4
- Use functional designs when simplicity, clarity, or provability makes them a better fit. section 3.4
- Translate shared patterns between styles instead of assuming that a pattern belongs exclusively to object-oriented programming. section 3.4
- Expect object-oriented examples to use TypeScript here, while procedural and functional examples may use ordinary JavaScript. section 1.0
