JavaScript in 2026
summary
Live coding shows concrete replacements for old patterns: use ES2023/24 array helpers like Array.prototype.toSorted and with instead of splice or in‑place sort; use Intl.ListFormat and Intl.DisplayNames for locale lists and region names; use set methods (union/intersection/symmetricDifference) and Promise.withResolvers; use the new resource scope via using / Symbol.dispose (sync and async) and AbortController for fetch. Demos run in modern browsers and Node (Node 25 adds built‑in TypeScript, sqlite, a test runner and permission/config flags), and all examples execute successfully.
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chapters (10)
- 0:00Introduction
- 1:40JavaScript collections update
- 9:31Internationalization APIs
- 20:19Promise handling with withResolvers
- 21:47Using keyword for cleanup
- 26:46Abort signals in fetch
- 29:12Node.js permission API
- 33:11Node.js SQLite and testing
- 35:18Node.js TypeScript support
- 41:07Q&A
