Skip to content
Projects

immerjs/immer

View on GitHub

immerjs/immer has 29,004 GitHub stars and 905 forks. GitHot measured +2 stars in 24 hours. Last checked 2026-11-07 22:13 UTC. Last push 2026-10-31.

How these counts are measured

Create the next immutable state by mutating the current one

29,004 stars905 forks +2 in 24h

Measured star growth

in 24h
+2
in 7 days
Collecting history
in 15 days
Collecting history
in 1 month
Collecting history

Net star changes over overlapping periods, not daily totals. Missing measurements are left blank. Stars measure attention, not software quality.

README.md

Original

Immer

npm Build Status Coverage Status code style: prettier OpenCollective OpenCollective Gitpod Ready-to-Code

Create the next immutable state tree by simply modifying the current tree

Winner of the "Breakthrough of the year" React open source award and "Most impactful contribution" JavaScript open source award in 2019

Contribute using one-click online setup

You can use Gitpod (a free online VSCode like IDE) for contributing online. With a single click it will launch a workspace and automatically:

  • clone the immer repo.
  • install the dependencies.
  • run yarn run start.

so that you can start coding straight away.

Open in Gitpod

Documentation

The documentation of this package is hosted at https://immerjs.github.io/immer/

Support

Did Immer make a difference to your project? Join the open collective at https://opencollective.com/immer!

Release notes

https://github.com/immerjs/immer/releases

Explore related projects

codecrafters-io/build-your-own-x

Master programming by recreating your favorite technologies from scratch.

560,798 stars

public-apis/public-apis

A collective list of free APIs

497,023 stars

morluto/rea

Reverse engineer anything with agents, from app behavior down to native binaries.

441,072 stars

openclaw/openclaw

The AI that really does things. Any OS. Any Platform. The lobster way. 🦞

394,145 stars