Immutable collections for JavaScript

Introduction

Getting started

Browser

Flow & TypeScript

Using TypeScript with Immutable.js v4+

Using TypeScript with Immutable.js v3 and earlier:

The case for Immutability

JavaScript-first API

Convert from raw JavaScript objects and arrays.

Converts back to raw JavaScript objects.

Embraces ES2015

Nested Structures

Equality treats Collections as Values

Performance tradeoffs

Return self on no-op optimization

Batching Mutations

Lazy Seq

Comparison of filter(), groupBy(), and partition()

Additional Tools and Resources

Contributing

Changelog

License

Thanks