There were several items on the agenda, this post focuses on feature proposals and their progress from the 99th TC39 meeting [6-8th Feb 2024].

Stage 1:

• Iterator Unique: add a method to iterators to produce an iterator of only its unique values.

• Micro and mini waits: Micro and mini waits in JS.

• Joint Iteration: synchronise the advancement of multiple iterators.

• iterator chunking: add a method to iterators for producing an iterator of its subsequences.

• Improved Escapes for Template Literals: raw string literals that can contain any arbitrary text.

• Math.sum: add a method to sum multiple values.

• Module Sync Assert: Attempting to resolve issues with an async module in the dependency graph causing bugs or breaking changes in the current module.

• ESM Phase Imports: Solves the static worker module analysis problem by defining phase imports for Source Text Module.

• Function and Object Literal Decorators: Decorators for Function Expressions and Declarations.

• Discard" (void) Bindings: void discard bindings for ECMAScript

Stage 2:

• Promise.try:an ergonomic, readable, and intuitive way to invoke a function and always get a Promise.

Stage 3:

• Uint8Array to/from Base64: Uint8Array<->base64/hex.

Stage 4:

• ArrayBuffer: ArrayBuffer.prototype.transfer and friends.

To Inactive State:

• Math Extensions: Math Extensions.

• Generator arrow functions: Generator arrow functions.

• Math.signbi: IEEE-754 sign bit.