iOSのMarkdownエディタで2回目にテキストを選択するとフリーズする

tannerabread · 2026 年 7 月 14 日午後 9:06

Hey @Ethsim2 この問題に対する修正をマージしました。まもなく利用可能になります。

github.com/discourse/discourse

FIX: iOS text selection regression with locked composer (#41711)

main ← fix-ios-text-selection

merged 09:03PM - 14 Jul 26 UTC

tannerabread

+16 -0

PR #41366 introduced a regression on iOS where text-selection gestures in the co…mposer would get canceled. The scroll-lock added there routes composer touchmove events through body-scroll-lock, which calls `preventDefault` at scroll boundaries -- and a short textarea is always at its boundary -- so iOS never got a chance to handle the selection-handle drag. Add a capture-phase touchmove listener on the editor that stops propagation when the editor has a selection, so the event never reaches body-scroll-lock's handlers and iOS handles the gesture natively. [Meta Topic](https://meta.discourse.org/t/ios-markdown-composer-editor-freezes-when-selecting-text-a-second-time/407258)

トピック		返信	表示
Can't drag to extend a text selection in the composer on iOS/iPadOS 18.x (touchmove selection frozen) Bug ios	5	114	2026 年 7 月 14 日
Chat Bug on iOS: Can't select text in composer window Bug chat	6	205	2025 年 1 月 11 日
Drag&select doesn’t work in composer (iPad) Support	2	79	2025 年 1 月 23 日
iOS 12: Selecting text / quoting not working after using the composer Bug	9	2417	2018 年 10 月 8 日
Deleting composer content causes it to freeze up Bug composer	2	90	2026 年 2 月 23 日

iOSのMarkdownエディタで2回目にテキストを選択するとフリーズする

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