There were several items on the agenda, this post focuses on feature proposals and their progress from the 104th TC39 meeting [8th-10th October 2024].
Stage 1:
Representing Measures: Proposal to format and represent measurements with proper units in JavaScript.
Immutable ArrayBuffers: Adds immutable variants of
ArrayBufferto ensure buffer contents cannot be changed.Array.zip: A method that creates an array of arrays, where each sub-array contains elements at the same index from multiple input arrays.
Stage 2:
Iterator chunking: Adds a utility to create chunks from iterators, returning fixed-size groups of elements.
Extractors: Provides utilities for data extraction, allowing structured data to be parsed and manipulated.
Structs: Introduces structured data types that are more predictable and memory-efficient for JavaScript.
Stage 2.7:
Error.isError: Enhances the
Error.isErrormethod for better error detection.Iterator Sequencing: Adds sequencing utilities to iterators, allowing more control over execution order.
Stage 3:
Atomics.pause: Introduces a mechanism to pause execution at atomic operations for concurrency management.
Stage 4:
Promise.try: Provides a utility to handle synchronous exceptions within promises more easily.
Sync Iterator Helpers: Extends iterators with helper methods to improve their usability in synchronous contexts.
Import Attributes: Proposal for syntax to import ES modules with assertions
JSON modules: Proposal to import JSON files as modules.
RegExp Modifiers: Enhances regular expressions with additional modifiers, allowing more flexible pattern matching.
Additionally The TG4 source maps spec got conditional consensus.
Hemanth HM