unadlib/mutative

Health v2 · maintenance only

Adoption not part of the score

1998 stars · 35 forks observed · 2026-10-11

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

Mutative is a TypeScript JavaScript library for efficient immutable state updates using a mutable draft API, producing new immutable structures. It is significantly faster than both handcrafted spread-based reducers and Immer, with support for JSON Patch, custom shallow copying, and optional freezing.

Use cases

• update deeply nested redux state without spread operators
• replace immer for faster immutable updates in react apps
• write reducers with mutable-style draft code
• generate patches from state changes
• manage large immutable data structures efficiently
• avoid accidental state mutations in reducers

When to choose

• you need immutable updates faster than immer or handcrafted reducers
• you want concise draft-based state update syntax in react/redux
• you need patch support or custom shallow copy control

When to avoid

• your state updates are trivial and spread operators suffice
• you depend on immer-specific plugins or auto-freeze ecosystem tooling

Facets

library · maturity stable

state-management serialization web-development frontend developer-tools browser cross-platform immutable-updates immer-alternative copy-on-write -patch redux react typescript nodejs web-server

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