Moving from JavaScript to TypeScript

TypeScript is able to flag errors at compile time, during development, rather than leaving them to surface at runtime. On a growing codebase, that difference compounds quickly.

It is used for type checking — sometimes called structural subtyping or 'duck typing' — and its interfaces let you describe the shape of data so the compiler can keep you honest as the code evolves.

Why teams make the move

• Errors caught in the editor, not in production
• Safer refactoring across large codebases
• Self-documenting interfaces and better tooling