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3 changes: 3 additions & 0 deletions .gitignore
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Expand Up @@ -43,3 +43,6 @@ public/rss.xml
# claude local settings
.claude/*.local.*
.claude/react/

# worktrees
.worktrees/
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Expand Up @@ -104,9 +104,15 @@ _Updated January 26, 2026._

## 高深刻度:複数のサービス拒否攻撃 {/*high-severity-multiple-denial-of-service*/}

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**CVE**: [CVE-2026-23864](https://www.cve.org/CVERecord?id=CVE-2026-23864)
**Base Score**: 7.5 (High)
**Date**: January 26, 2025
=======
**CVEs:** [CVE-2026-23864](https://www.cve.org/CVERecord?id=CVE-2026-23864)
**Base Score:** 7.5 (High)
**Date**: January 26, 2026
>>>>>>> 55a317d40781a0054a05a9f6c443ae0bd71f7d7e

セキュリティ研究者により、React Server Components に追加の DoS 脆弱性が残っていることが発見されました。

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5 changes: 5 additions & 0 deletions src/content/reference/react/Activity.md
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Expand Up @@ -47,8 +47,13 @@

#### 注意点 {/*caveats*/}

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Check failure on line 50 in src/content/reference/react/Activity.md

View workflow job for this annotation

GitHub Actions / Lint on node 20.x and ubuntu-latest

コンフリクトマーカーが残っています。コンフリクトを解消してください。
- [`ViewTransition`](/reference/react/ViewTransition) の内部で Activity がレンダーされ、[`startTransition`](/reference/react/startTransition) によって引き起こされた更新の結果として表示されるようになると、`ViewTransition` の `enter` アニメーションが作動します。非表示になると、`exit` アニメーションが作動します。
- テキストのみをレンダーする Activity は、非表示のテキストをレンダーするのではなく、何もレンダーしません。これは、可視性の変化を適用するための対応する DOM 要素がないためです。例えば、`<Activity mode="hidden"><ComponentThatJustReturnsText /></Activity>` は、`const ComponentThatJustReturnsText = () => "Hello, World!"` の場合に DOM に何も出力しません。
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- If an Activity is rendered inside of a [ViewTransition](/reference/react/ViewTransition), and it becomes visible as a result of an update caused by [startTransition](/reference/react/startTransition), it will activate the ViewTransition's `enter` animation. If it becomes hidden, it will activate its `exit` animation.
- A *hidden* Activity that just renders text will not render anything rather than rendering hidden text, because there’s no corresponding DOM element to apply visibility changes to. For example, `<Activity mode="hidden"><ComponentThatJustReturnsText /></Activity>` will not produce any output in the DOM for `const ComponentThatJustReturnsText = () => "Hello, World!"`. `<Activity mode="visible"><ComponentThatJustReturnsText /></Activity>` will render visible text.
>>>>>>> 55a317d40781a0054a05a9f6c443ae0bd71f7d7e

---

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