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ECMAScript 2024; June TC39 meeting; Babel 7.25.0; subresource integrity; performance optimizations;

Dear readers!

ECMAScript News is taking its mid-year break and will be back on October 1. We wish you a good time!

Axel & Jowe

ECMAScript

What’s new for JavaScript developers in ECMAScript 2024

thenewstack.io @marypcbuk@hachyderm.io @TheNewStack@hachyderm.io

“Our analysis of the small but helpful features in the latest annual JavaScript release, including easier WebAssembly integration.”

Several people are interviewed who worked on these features.

Summary of the June 2024 TC39 plenary in Helsinki

blogs.igalia.com @igalia@floss.social

Babel 7.25.0: Safari bugfixes and duplicated named capturing groups

babeljs.io @babeljs@fosstodon.org

Highlights:
  • Duplicate named capturing groups in RegExp literals
  • Simplify JSON modules imports in CommonJS
  • Fix for parentheses around expressions in class fields in Safari < 16

Coding techniques

Subresource integrity for scripts, CSS, etc. (via cryptographic hashes)

frontendmasters.com @chriscoyier@front-end.social github.com/FrontendMasters

“There is a web platform feature that can help against a third party changing the code they are providing. It’s the integrity attribute on <script> or <link> elements (which are rel="stylesheet", rel="preload", or rel="modulepreload"). It’s called ‘Subresource Integrity’, to name it correctly.”

JavaScript performance optimizations: code splitting, lazy loading, web workers, minifying files, asynchronous loading and more

thenewstack.io @TheNewStack@hachyderm.io

ES Tooling: GitHub organization for performance-related tooling

e18e.dev @e18e@m.webtoo.ls

The blog post mentions three projects that have already joined this organization:
  • Ecosystem cleanup
  • Module replacements
  • Module replacements codemods

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Podcasts

Josh Goldberg – going flat with ESLint [81-min. audio]

changelog.com @JoshuaKGoldberg@fosstodon.org @nicknisi@nicknisi.com @boneskull@fosstodon.org @changelog@changelog.social

  • Josh Goldberg joins Nick and Chris to discuss the latest updates from ESLint, typescript-eslint and the new flat config format.
  • They also discuss creating reusable configs and project generators
  • before pivoting to talk about a new conference focused on developer tooling.
  • Finally, Chris and Josh talk about the past, present and future of Mocha.

Working Code Podcast: code review nuance [63-min. audio]

www.bennadel.com

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Older messages

Subject

Tuesday, July 23, 2024

We have 4 links for you - Stay up-to-date on JavaScript and tools Node.js v22.5.0 (current): node:sqlite and more nodejs.org github.com/aduh95 @nodejs@social.lfx.dev Highlights: SQLite was added to

Leaner npm metadata; Boa JS engine; pnpm 9.5; Vitest 2.0; ESLint v9.7.0; Deno 1.45

Tuesday, July 16, 2024

We have 7 links for you - Stay up-to-date on JavaScript and tools Leaner npm “packument” (package version metadata) github.blog github.com/npm “Starting today, the npm registry will begin removing

Next for ESLint; aborting Promises; Math.random() vs. Crypto.getRandomValues(); library stdlib.io;

Tuesday, July 9, 2024

We have 14 links for you - Stay up-to-date on JavaScript and tools What's coming next for ESLint eslint.org @nzakas@fosstodon.org @eslint@fosstodon.org “The new configuration system is just the

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

Tuesday, July 2, 2024

We have 10 links for you - Stay up-to-date on JavaScript and tools This Week In React - Keeps senior React devs up to date thisweekinreact.com Partner We keep over 40k mid/senior React devs up-to-date

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

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