Updates from the 86th meeting of TC39

There were several items on the agenda, this post focuses on feature proposals and their progress form the meeting that was held between October 25th-28th, 2021.

Stage 4:

• Intl.Segmenter: Unicode segmentation in JavaScript slides.

• Error Cause : .cause property on all Error types slides.

Stage 3:

• Intl.DurationFormat: Intl.DurationFormat duration formatting slides.

Stage 2:

• Destructure Private Fields: Integrate private fields and destructuring slides.

• array-grouping: make grouping of items in an array easier slides.

Stage 1:

• String.cooked: String.raw but which concatenates the “cooked” (escaped string value) strings rather than the raw strings slides.

• bind-this: A resurrected proposal for a bind-this operator slides.

• RegExp Extended Mode and Comments: Extended Mode and Comments for RegExp slides.

• RegExp \R Escape: Matches any line ending character sequence slides.

• RegExp Buffer Boundaries: \A, \z, \Z allows to match the start or end of the entire input regardless of whether the m (multiline) flag has been set slides.

• Evaluator Attributes: Enables the module import syntax to provide extra attributes along with a given import as evaluator attributes with the primary use case in mind of permitting these module type imports for Wasm slides.