Comparing
Modern JavaScript date utility library
TypeScript is a language for application scale JavaScript development
| Metric | date-fns | typescript |
|---|---|---|
| Ecosystem | npm | npm |
| Difficulty | Intermediate | Beginner ✓ |
| Weekly downloads | 71.4M | 176.4M↑ |
| Latest version | v4.1.0 | v6.0.2 |
| Recipes | 2↑ | 1 |
date-fns only
Shared
typescript only
Use date-fns for formatting, parsing, arithmetic (add/subtract days, months, years), comparison, and locale-aware output in any JavaScript environment. Import only what you need and the bundle impact is minimal.
Use TypeScript for any JavaScript project that will grow beyond a few hundred lines or be worked on by more than one person. The upfront cost of adding types pays back quickly in editor autocomplete, safe refactoring, and catching bugs before runtime.
date-fns v2 has limited first-party timezone support — for complex timezone-aware applications use Luxon or the Temporal polyfill. The function-heavy API can feel verbose for simple one-liners; Day.js's method chaining is more readable in those cases.
TypeScript adds a compilation step and a learning curve. For tiny scripts, config files, or throwaway code, plain JavaScript is faster to write. TypeScript's type system also has limits — it can't track runtime behaviour, only the shape of values at compile time.
date-fns
typescript