TypeScript is a programming language developed by Microsoft that adds a static type system to JavaScript. Browsers can't run TypeScript directly — it's compiled to JavaScript at build time. So why is this extra step worth it?
1. Compile-Time Error Detection
One of JavaScript's biggest pitfalls is that errors appear at runtime. TypeScript catches issues instantly in the editor when you send a wrong type value to a function — before your code ever runs.
According to Stack Overflow surveys, TypeScript has consistently ranked among the most loved programming languages for the past 5 years.
2. Better IDE Support and Autocomplete
Thanks to TypeScript types, your editor (VS Code, WebStorm) knows which properties and methods are available. This significantly speeds up development: you don't need to memorize which fields of an object you can use.
3. Self-Documenting Code
Type definitions clearly show what functions take and return. When a new developer joins the project, they can quickly understand the code by looking at type definitions rather than reading lengthy documentation.
4. Safe Refactoring
In large projects, changing a function signature or an object's structure is extremely risky. With TypeScript, when such changes are made, you get compile errors everywhere that uses that structure — no usage goes unnoticed.
5. Confidence in Team Collaboration
In projects with multiple developers, TypeScript serves as a contract. When an API endpoint, component props, or Redux action structure is type-defined, team members can confidently use each other's code.
Conclusion
We use TypeScript in all our projects because the vast majority of production errors stem from type mismatches. TypeScript prevents these errors from the start, improves developer experience, and increases code quality.