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2022-03-29のJS: ES2022リリース候補版、Safari Technology Preview 142、Storybookの代替実装 #972
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ECMAScript 2022のリリース候補版となる仕様書のドラフトが公開されました。
合わせて、ECMAScript Internationalization APIのES2022のリリース候補版が公開されています。
6月のEcma InternationalでのGA(総会)で承認されたタイミングで、ES2022が正式にリリースされる予定です。
Normative(仕様の変更、Proposalを仕様にマージ)な変更は次のページにまとめてあります。
次のProposalが、それぞれES2022に含まれる予定です。
await
proposalES2022に対応するブラウザはECMAScript compatibility tableで確認できます。Node.jsはnode.greenで確認できます。
ES2022に対応するツールだと、Babel、TypeScript 4.6、ESLint v8.9.0、esbuild v0.14.24などが対応済みです。
ES2022に対応する書籍だと、JavaScript for impatient programmersが既に対応済みで、JavaScript Primerが対応中となっています。
Safari Technology Preview 142がリリースされました。
CSS Subgrid/CSS Container Queries/CSS Motion Pathがデフォルトで有効化されています。
ECMAScript Proposal Stage3のShadowRealmをデフォルトで有効化されています。
また、以前実装がありましたがその後削除されたSharedWorkerの実装が再度進められています。
そのほかには、WebKitがProposalを出している3Dコンテンツを表示する
<model>
要素の実験的な実装が含まれています。