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Introduction Type Safety Tensor Expressions Tensor Indexing Einsum Einops Autograd Training a Model Profiling & Memory PyTorch Migration Best Practices Runtimes Performance PyTorch Compatibility Benchmarks DType Coverage

Introduction Renderer Gallery Renderers Analysis

animate lerp lerpArray lerpFloat32Array transitionNumber transitionArray transitionFloat32Array createAnimationLoop sequence parallel animateAsync debounce throttle EasingFunction AnimationOptions TransitionOptions createInteractiveCanvas InteractiveCanvas InteractiveCanvas.resetView InteractiveCanvas.getTransform InteractiveCanvas.setTransform InteractiveCanvas.zoomToRect InteractiveCanvas.destroy HitTester HitTester.clear HitTester.addRegion HitTester.addRegions HitTester.hitTest HitTester.hitTestAll ViewTransform TooltipData SelectionRect ClickData InteractiveCanvasOptions HitRegion createCanvasTarget createTextureTarget CanvasTarget TextureTarget ExportFormat RenderTarget computeNiceTicks defaultTickFormat createTextOverlay TextOverlay TextOverlay.clear TextOverlay.drawText TextOverlay.drawLine TextOverlay.drawXAxis TextOverlay.drawYAxis TextOverlay.drawTitle TextOverlay.drawLegend TextOverlay.getCanvas TextOverlay.resize TextOverlay.compositeTo TextStyle AxisConfig ChartAxes createThumbnailGenerator generateThumbnail ThumbnailGenerator ThumbnailGenerator.generate ThumbnailGenerator.generateBlob ThumbnailGenerator.generateDataURL ThumbnailGenerator.destroy ThumbnailOptions createCanvasTooltip createDOMTooltip CanvasTooltip CanvasTooltip.show CanvasTooltip.hide CanvasTooltip.updatePosition CanvasTooltip.render CanvasTooltip.setOptions CanvasTooltip.isVisible CanvasTooltip.destroy DOMTooltip DOMTooltip.show DOMTooltip.hide DOMTooltip.isVisible DOMTooltip.destroy TooltipPosition TooltipContent TooltipOptions getSharedDevice getPreferredFormat configureCanvas createRenderPipeline

torch.js· 2026

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viz
viz
core
HitTester
hitTest

viz.core.HitTester.hitTest

HitTester.hitTest(x: number, y: number): T | null

Test if a point hits any region.

Parameters

xnumber: X coordinate in data space
ynumber: Y coordinate in data space

Returns

T | null– The hit region's data, or null if no hit

HitTester.clear

HitTester.hitTestAll