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JSer.info#740 - -[Ecma International approves new standards - Ecma International](https://ecma-international.org/news/ecma-international-approves-new-standards-11/)
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JSer.info#740 - ECMAScript 2025 が正式にリリースされました。
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-[Ecma International approves new standards - Ecma International](https://ecma-international.org/news/ecma-international-approves-new-standards-11/)
[developer.chrome.com/blog/chrome-139-beta?hl=en](https://developer.chrome.com/blog/chrome-139-beta?hl=en"Chrome 139 beta | Blog | Chrome for Developers")
-[Intent to Ship: Spec-compliant JSON MIME type detection](https://groups.google.com/a/chromium.org/g/blink-dev/c/-lZFLXH7_Y8/m/ZzgLXc91AQAJ"Intent to Ship: Spec-compliant JSON MIME type detection")
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##Ecma International approves new standards - Ecma International
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[ecma-international.org/news/ecma-international-approves-new-standards-11/](https://ecma-international.org/news/ecma-international-approves-new-standards-11/"Ecma International approves new standards - Ecma International")
##dahlia/logtape: Simple logging library with zero dependencies for Deno, Node.js, Bun, browsers, and edge functions
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[github.com/dahlia/logtape?tab=readme-ov-file](https://github.com/dahlia/logtape?tab=readme-ov-file"dahlia/logtape: Simple logging library with zero dependencies for Deno, Node.js, Bun, browsers, and edge functions")
##CSS conditionals with the new if() function | Blog | Chrome for Developers
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[developer.chrome.com/blog/if-article?hl=en](https://developer.chrome.com/blog/if-article?hl=en"CSS conditionals with the new if() function | Blog | Chrome for Developers")
##How We Reduced CKEditor’s Bundle Size by 40% | CKEditor
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[ckeditor.com/blog/how-we-reduced-ckeditor-bundle-size/](https://ckeditor.com/blog/how-we-reduced-ckeditor-bundle-size/"How We Reduced CKEditor’s Bundle Size by 40% | CKEditor")
`/* #__PURE__ */`コメントの活用、ES2022 への target 変更、`sideEffects`フラグの設定などを行う tree shaking の問題を解決していった話。
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また、Sonda を使った bundle 分析について
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-[Sonda](https://sonda.dev/"Sonda")
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##\`useOptimistic\` to Make Your App Feel Instant | Epic React by Kent C. Dodds
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[www.epicreact.dev/use-optimistic-to-make-your-app-feel-instant-zvyuv](https://www.epicreact.dev/use-optimistic-to-make-your-app-feel-instant-zvyuv"\`useOptimistic\` to Make Your App Feel Instant | Epic React by Kent C. Dodds")
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[www.epicreact.dev/use-optimistic-to-make-your-app-feel-instant-zvyuv](https://www.epicreact.dev/use-optimistic-to-make-your-app-feel-instant-zvyuv"`useOptimistic` to Make Your App Feel Instant | Epic React by Kent C. Dodds")
##photostructure/tz-lookup: JavaScript Library for Timezone Lookup by Location
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[github.com/photostructure/tz-lookup](https://github.com/photostructure/tz-lookup"photostructure/tz-lookup: JavaScript Library for Timezone Lookup by Location")