ECMAScript 2024; new Set methods; JS performance initiative; rounding errors; benchmarking tool

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Ecma International approves ECMAScript 2024: What’s new?

2ality.com @rauschma@fosstodon.org

For each of the following new features, there is a brief explanation, a code example and a link to a longer explanation:
  • Grouping synchronous iterables
  • Promise.withResolvers()
  • Regular expression flag /v
  • New features for ArrayBuffers and SharedArrayBuffers
  • Ensuring that strings are well-formed
  • Atomics.waitAsync()

The JavaScript Set methods are now part of Baseline

web.dev @tropicadri@hachyderm.io

The following new Set methods (a feature that will be part of ECMAScript 2025) are now available in all major browsers:
  • Set.prototype.union(other)
  • Set.prototype.intersection(other)
  • Set.prototype.difference(other)
  • Set.prototype.symmetricDifference(other)
  • Set.prototype.isSubsetOf(other)
  • Set.prototype.isSupersetOf(other)
  • Set.prototype.isDisjointFrom(other)
A 2ality blog post covers these methods in more detail.

e18e (Ecosystem Performance): creating a community dedicated to JavaScript performance

e18e.dev @e18e@m.webtoo.ls

Quoting the e18e website:
  • e18e (Ecosystem Performance) is an initiative to connect the folks and projects working to improve JS packages performance.
  • We’d also like to provide visibility to the efforts of countless Open Source developers working to cleanup, levelup, and speedup our dependencies.
  • We invite you to get involved in the different projects linked from these pages, and to connect with others like-minded folks.

Handling JavaScript rounding errors in financial applications

www.robinwieruch.de github.com/rwieruch

ESBench: modern JavaScript benchmarking tool

esbench.vercel.app github.com/ESBenchmark

Videos of JSNation 2024 talks are online

portal.gitnation.org @gitnationorg@techhub.social

New versions

Rolldown v0.10.5: bundling TypeScript and more

github.com @hyf@webtoo.ls github.com/rolldown

Oxlint v0.5.0: new linting rules for JavaScript and TypeScript

github.com github.com/oxc-project

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Older messages

ES2024 book; State of JS results; improving ESM; web build tool “Farm”; optimizing JS; property-base

Tuesday, June 25, 2024

We have 13 links for you - Stay up-to-date on JavaScript and tools Out now: “Exploring JavaScript (ES2024 Edition)” exploringjs.com @rauschma@fosstodon.org “Exploring JavaScript” is the new name of the

Better ESM experience; Node.js is here to stay; June TC39 meeting; Node.js test runner; MDN as...

Tuesday, June 18, 2024

We have 10 links for you - Stay up-to-date on JavaScript and tools How JavaScript is finally improving the module experience thenewstack.io @marypcbuk@hachyderm.io “Multiple long-term proposals

Prettier 3.3; Turborepo 2.0; Rspack v0.7.1; most popular language; ArrayBuffers; Promises; Corepack;

Tuesday, June 11, 2024

We have 11 links for you - Stay up-to-date on JavaScript and tools Prettier 3.3: better formatting for import attributes, property keys, template interpolations, etc. prettier.io github.com/

ESLint Configuration Migrator; Rspack v0.7; Deno 1.44; oxlint v0.4.2; Intl.DateTimeFormat;

Tuesday, June 4, 2024

We have 8 links for you - Stay up-to-date on JavaScript and tools Tired of handling a tech stack with REST, SQL, Webpack and 1000 other technologies? github.com Sponsor With its radically holistic

Symbols as WeakMap keys, Compression Streams

Monday, June 3, 2024

We have 3 links for you - Stay up-to-date on JavaScript and tools ECMAScript 2023 feature: symbols as WeakMap keys 2ality.com @rauschma@fosstodon.org This blog post answers two questions: What are

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