Drop location after drag and drop

GoJS
1

Currently developing a drag and drop based on example: HTML Drag and Drop, and external Clipboard pasting

I’m trying to understand how the drop location is calculated. is the value of “window.PIXELRATIO” a constant or how is this value calculated?

2

It’s computed when the diagram is initialized:

window.PIXELRATIO = myDiagram.computePixelRatio(); // constant needed to determine mouse coordinates on the canvas
3

I see it now. Thanks