Bug: Hoisted <title> containing more than 1 JSX child will contain nothing

facebook/react#33341 ↗·★ 250633·JavaScript·332 天未动·7 条评论·上游最近活跃 2025-10-24·池内状态：可认领

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上游 issue 正文

React version: 19.1.0 ## Steps To Reproduce Add a `<title>` attribute with more than than 1 JSX child e.g. `<title>{projectName} | Projects</title>` or `<title>{projectName}{section}</title>` Link to code example: https://stackblitz.com/edit/vitejs-vite-nch86hgd?file=src%2FApp.tsx ## The current behavior The title that gets hoisted to `<head>` is empty (i.e. `<title></title>`), with no console errors ## The expected behavior The children are concatenated, e.g. `<title>My Project | Projects</title>` You can of course work around the issue by ensuring there is only one child `<title>{projectName + " | Projects"}</title>`

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