b140d4d82a
- 313 new markdown files created - 30 relationships embedded - 313 entries indexed - State initialized with usage data
27 lines
1.2 KiB
Markdown
27 lines
1.2 KiB
Markdown
---
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id: 20059335-a27d-4d43-a37c-1bb561c1deaf
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type: code_pattern
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title: "Foundry VTT ActorSheetV2 scroll position preservation"
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tags: [foundryvtt, applicationv2, actorsheetv2, scroll, pattern, javascript]
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importance: 0.8
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confidence: 0.8
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created: "2025-12-14T19:12:40.421111+00:00"
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updated: "2025-12-14T19:12:40.421111+00:00"
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---
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When using ApplicationV2/ActorSheetV2 in Foundry VTT v13, sheet re-renders (triggered by data updates like toggling a boolean) reset scroll position to top. Solution: Override _preRender() to save scroll positions and _onRender() to restore them.
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Implementation in base sheet class:
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1. Add this._scrollPositions = {} in constructor
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2. In _preRender(): call this._saveScrollPositions()
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3. In _onRender(): call this._restoreScrollPositions()
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_saveScrollPositions() queries scrollable elements (.window-content, .tab-content) and saves their scrollTop values.
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_restoreScrollPositions() restores those values after render.
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Key selectors to save:
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- .window-content (main Foundry window scroll)
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- .tab-content (tab body scroll if using tabbed layout)
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This pattern works for any ApplicationV2 subclass, not just actor sheets. File: module/sheets/base-actor-sheet.mjs in vagabond-rpg-foundryvtt project.
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