The JavaScript Record and Tuple proposal: An overview

The ECMAScript Record and Tuple proposal seeks to introduce two new deeply immutable data structures, records and tuples, to JavaScript, aimed at providing a standardized way to manage compound primitives. Unlike objects and arrays which can be altered, records and tuples ensure immutability, allowing for strict equality comparisons based on their contents. This proposal is currently in stage 2 of the TC39 process and aims to address limitations found in current immutability solutions like Immutable.js and Immer, providing a native approach that avoids the complexities and interoperability issues of existing libraries. Records are designed to be object-like, while tuples are array-like, and both can only contain primitive types, including other records and tuples. The proposal offers clear syntax using a preceding '#' modifier and supports familiar methods for manipulation and conversion between records, tuples, and traditional objects or arrays. It also introduces JSON.parseImmutable for handling JSON strings with these types. The proposal remains a work in progress, but it offers a promising direction for enhancing JavaScript's handling of immutable data.