In the world of Next.js, we move fast. JavaScript's flexibility is speed. But as an application scales, that flexibility can become a liability.
But as our Next.js project scaled, that speed came at a cost. What was once "flexible" started to become "fragile." Onboarding new engineers took longer. Refactoring a core component was a high-risk, "search and replace" operation.
That's why we're migrating to TypeScript (.tsx). It's not a trend, it's a strategic move for stability and scale.
Here's the practical difference:
Fewer Production Bugs: We now catch type-related errors (like string vs. number) in the editor, not when a user reports a crash.
Confident Refactoring: Renaming a prop is no longer a "find and replace" prayer. The compiler gives us a precise to-do list, making changes safe and fast.
Faster Onboarding: Types act as instant, reliable documentation. New engineers can understand a component's data requirements in seconds, not by reading its entire implementation.
Next.js has first-class support, making the transition smooth.
Yes, it's an initial time investment. But the payoff in reduced technical debt, fewer hotfixes, and higher developer velocity is more than worth it. It’s the professional standard for a reason.