2024-10-16のJS: Deno v2、TypeScript 5.7 Beta、ES2025に入る5つのProposal #1232
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Deno v2.0.0がリリースされました
Node.jsとの互換性の改善、JSRのサポート改善、Workspaceのサポートなどが行われています。
Deno 1.xから2.xへのマイグレーションガイドも公開されています。
TypeScript 5.7 Betaがリリースされました
初期化されてない変数のチェック、相対パスの
.tsを出力時に.jsへと書き換える--rewriteRelativeImportExtensionsフラグの追加されています。また、
--target es2024のサポート、Node.js 22のV8 Compile Cacheをサポートして実行速度の改善なども行われています。。2024年10月のTC39のミーティングで5つのProposalがStage 4になりました。
Promise.try/Import Attributes/RegExp Modifiers/Sync Iterator helpers/JSON ModulesがそれぞれStage 4になりました。
そのため、これらの機能はES2025に含まれることになります。
それ以外にもすでにStage 4になっているProposalは次のページで確認できます。