Writing React without principles is like cooking spaghetti without a pot — messy, unpredictable, and probably going to end up on the floor. The SOLID principles swoop in like React’s secret superhero squad: tiny, focused, and reusable. They keep your components slim, your hooks useful, and your future self from angrily asking “who wrote this monster component?” (spoiler: it was you).
The following table shows the Do’s ✅ and Don’ts ❌ of applying SOLID principles in React:
| Principle | ✅ Do | ❌ Don’t |
|---|---|---|
| SRP (Single Responsibility Principle) | Split large components into smaller ones; put logic in hooks, UI in components. | Cram state, API calls, and rendering into one component. |
| OCP (Open/Closed Principle) | Design hooks/components to be extendable via props or composition. | Edit old, working code whenever requirements change. |
| LSP (Liskov Substitution Principle) | Keep similar components interchangeable by sharing the same props (e.g., <Link> vs <IconLink>). |
Create inconsistent APIs that break when swapping components. |
| ISP (Interface Segregation Principle) | Pass only the props a component actually needs. | Use “mega props” objects with lots of unused properties. |
| DIP (Dependency Inversion Principle) | Use context, hooks, or HOCs to decouple dependencies when appropriate. | Overengineer with contexts/HOCs when a simple prop would suffice. |
Follow SOLID in React and your codebase becomes less of a haunted house and more of a well-organized IKEA catalogue — everything modular, extendable, and (mostly) frustration-free. By dodging mega-components, mystery props, and over-engineered contexts, you’ll build apps that don’t collapse under their own weight. Think of SOLID as the friendly nag reminding you:
Keep it simple, don’t break what works, and stop making your test files 1000 lines long!
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