https://severinbucher.com/tags/refactoring/Recent content in Refactoring on Severin Bucher | BlogHugoenWed, 26 Mar 2025 00:00:00 +0000https://severinbucher.com/posts/enabling-typescript-strict-mode-in-a-legacy-react-project/Wed, 26 Mar 2025 00:00:00 +0000https://severinbucher.com/posts/enabling-typescript-strict-mode-in-a-legacy-react-project/<p>Our App was created in 2017. It is a React application written in TypeScript. At the time, TypeScript was gaining popularity, but strict type safety wasn&rsquo;t a major concern for most teams. Our knowledge of TypeScript was limited, and the primary goal was to use it for basic type annotations rather than enforcing a fully type-safe codebase.</p> <p>As a result, strict mode was never turned on. The codebase ran without the safeguards strict mode brings: strict null checks, no implicit <code>any</code>, and tighter type inference. As the project grew, that gap started to cost us. Subtle bugs slipped through, and refactoring carried more risk than it should have.</p>