July 30, 2024

Subject: ECMAScript 2024; June TC39 meeting; Babel 7.25.0; subresource integrity; performance optimizations; ES Tooling organization; ESLint; code reviews

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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