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date-fns
Core details
Title
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Description
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date-fns is a modular, immutable JavaScript date utility library providing functions for formatting, parsing, and manipulating dates without mutating originals. It's lightweight and tree-shakeable.
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Usage & Trade-offs
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When to use it
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Choose date-fns when: - Handling dates in JS without Moment bloat. - Needing specific utils (format, addDays). - Building i18n-aware apps. - Tree-shaking for bundles.
Pros
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- Modular: import only needed functions. - Immutable and pure. - No global deps or side effects. - TypeScript support. - 200+ functions.
Cons
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- No built-in locale bundling (manual). - Less ergonomic than Luxon for zones. - Smaller community. - Parsing less forgiving. - No plugins.
Notes
Note: Use format with tokens like yyyy-MM-dd. Pipe functions for chaining. Bundle locales dynamically.
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