lukeed/klona

Health v2 · maintenance only

Adoption not part of the score

1732 stars · 48 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

klona is a tiny (240B–501B gzipped) JavaScript utility for deep cloning objects, arrays, dates, regular expressions, maps, sets, typed arrays, and more. It ships in multiple size-optimized modes so you only bundle the cloning capability you need.

Use cases

• deep clone a nested object in JavaScript
• copy state without shared references in a reducer
• clone arrays and objects faster than structuredClone
• deep copy JSON data in a tiny bundle
• duplicate objects with Dates, RegExps, Maps, and Sets
• avoid shallow copy pitfalls with Object.assign

When to choose

• you need a very small, fast, dependency-free deep clone utility
• you want tree-shakeable modes tailored to the data types you clone
• you target environments where structuredClone is unavailable or too slow

When to avoid

• you need cloning of functions, class instances with private fields, or circular references
• structuredClone or your framework's built-in cloning already covers your needs
• you need serialization to strings rather than in-memory copies

Facets

library · maturity stable

serialization developer-tools web-development browser cross-platform deep-clone tiny-library zero-dependency immutable-copy javascript nodejs

Member repositories

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