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Description

Immer (German for: always) is a tiny package that allows you to work with immutable state in a more convenient way. It is based on the copy-on-write mechanism.

The basic idea is that you will apply all your changes to a temporary draftState, which is a proxy of the currentState. Once all your mutations are completed, Immer will produce the nextState based on the mutations to the draft state. This means that you can interact with your data by simply modifying it while keeping all the benefits of immutable data.

Monthly Downloads: 0
Programming language: JavaScript
License: MIT License
Tags: Data Structure     Data     Object     Module     Tree    
Latest version: v8.0.0

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README

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 VS Code 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