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This release adds 2D canvas rendering for shape indicators, R-tree spatial indexing for faster queries, telestrator-style laser behavior, a preference for inverting mouse wheel zoom direction, and improved sync performance. It also includes various bug fixes for collaborator indicators, hidden shape handling, and spatial indexing.

What's new

2D canvas rendering for shape indicators (#7708)

Shape indicators (selection outlines, hover states) now render using a 2D canvas instead of SVG elements. This significantly improves performance when selecting or hovering over many shapes, with up to 25x faster rendering in some scenarios.

Custom shapes can opt into canvas indicators by implementing the new getIndicatorPath() method on their ShapeUtil:

class MyShapeUtil extends ShapeUtil<MyShape> {
	getIndicatorPath(shape: MyShape): TLIndicatorPath | null {
		return {
			path: new Path2D(),
			// optional clip path for complex shapes like arrows with labels
		}
	}

	// Return false to use the new canvas indicators (default is true for backwards compatibility)
	useLegacyIndicator(): boolean {
		return false
	}
}

Invert mouse wheel zoom direction (#7732)

Added a new user preference to invert mouse wheel zoom direction. Some users prefer "natural" scrolling behavior where scrolling down zooms out, which this option now enables.

Access it via Menu → Preferences → Input device → Invert mouse zoom.

R-tree spatial indexing (#7676)

Shape queries now use an R-tree (RBush) for O(log n) lookups instead of O(n) iteration. This significantly improves performance of brushing, scribble selection, and erasing operations, especially with many shapes on the canvas.

The spatial index is maintained internally and accessed through existing public methods like editor.getShapesAtPoint() and editor.getShapeAtPoint().

Telestrator-style laser pointer (#7681)

The laser pointer now behaves like a telestrator: all strokes remain visible while you're drawing and fade together when you stop. Previously, each stroke segment would fade independently, creating a trailing effect.

New API additions for controlling laser sessions:

// End the active laser session manually
editor.scribbles.endLaserSession()

// Check if a scribble belongs to the active session
editor.scribbles.isScribbleInLaserSession(scribbleId)

New options in TldrawOptions:

• laserSessionTimeoutMs (default: 2000ms) - Inactivity duration before the laser session ends
• laserMaxSessionDurationMs (default: 60000ms) - Maximum duration for a laser session

API changes

• Remove editor.spatialIndex from public API. The spatial index is now internal; use editor.getShapesAtPoint() and editor.getShapeAtPoint() for shape queries. (#7699)
• Add ShapeUtil.getIndicatorPath() method and TLIndicatorPath type for canvas-based indicator rendering. Add ShapeUtil.useLegacyIndicator() to control whether shapes use SVG or canvas indicators. (#7708)
• Add isZoomDirectionInverted to TLUserPreferences interface and UserPreferencesManager.getIsZoomDirectionInverted() method. Add ToggleInvertZoomItem component export and toggle-invert-zoom action. (#7732)
• Add complete to TL_SCRIBBLE_STATES enum and ScribbleManager.complete(id) method for marking scribbles as complete before fading. (#7760)
• Add ScribbleManager.endLaserSession() and ScribbleManager.isScribbleInLaserSession() methods for controlling laser sessions. Add laserSessionTimeoutMs and laserMaxSessionDurationMs to TldrawOptions. (#7681)
• Add FpsScheduler class to create FPS-throttled function queues with configurable target rates. (#7418)

Improvements

• Add R-tree spatial indexing for O(log n) shape queries, improving performance of brushing, selection, and erasing with many shapes. (#7676)
• Improve laser pointer to keep all strokes visible during a session (telestrator pattern), with strokes fading together when drawing stops. (#7681)
• Improve laser pointer strokes with proper taper when lifting the pointer by adding a 'complete' state to the scribble lifecycle. (#7760)
• Reduce network traffic by squashing pending push requests before sending, so rapid edits result in fewer network calls. (#7724)
• Reduce solo-mode network traffic by using a dedicated FPS-based scheduler that throttles to 1 FPS when no collaborators are present. (#7657)
• Improve performance by separating UI and network scheduling into independent queues with configurable target FPS. (#7418)
• Improve frame label sizing on smaller viewports and when zoomed out. (#7746)

Bug fixes

• Fix zoomToFit and getCurrentPageBounds to ignore hidden shapes when computing bounds. (#7770)
• Fix collaborator shape indicators not rendering after the canvas indicator change. (#7759)
• Fix rich text content not updating correctly with message squashing due to reference comparison. (#7758)
• Fix keyboard shortcut menu item labels to use consistent ellipsis formatting. (#7757)
• Fix spatial index not removing shapes when moved to a different page. (#7700)