Updates from TC39 meeting in June 2022
dev.to
@GNUmanth
Stage changes for ECMAScript proposals:
- Stage 4: Array find from last
- Stage 3: Symbols as
WeakMap keys
- Stage 2:
String.dedent, Duplicate named capture groups, JSON.parse() source text access
- Stage 1: Faster Promise adoption, RegExp Atomic Operators
Additionally, the proposed Array methods .groupBy() and .groupByToMap() were renamed to .group() and .groupToMap().
Rome Tools 0.6.0
github.com
@rometools
New in this version:
- Formatter: output looks more like Prettier’s, performance improved by 20%–30%
- Linter: a foundation and a few first rules now exist
Build internal tools 10x faster with Retool
retool.com
Sponsor
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AbortController is your friend [aborting asynchronous tasks in JavaScript]
whistlr.info
@samthor
The AbortController API enables us to abort tasks that run asynchronously. This blog post gives tips for using this API:
- The difference between controllers and signals
- Using an
AbortController to abort a fetch() request
- Adding
AbortController support to legacy APIs
- Automatically removing event handlers via signals
- Using the
AbortController API for your own classes
- Aborting
useEffect() callbacks
- Three static helper methods:
AbortSignal.timeout(ms)AbortSignal.any(signals)AbortSignal.throwIfAborted()
qnm: CLI utility for querying the node_modules directory
github.com
@ranyitz
Features:
- Interactive fuzzy-search
- Match all packages with a specific string
- Explain why a package was installed
- Supports monorepos
- Show when a version was released and what the latest version is
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