The Typescript definitions for Kendo UI define the connections() method which is part of the kendo.dataviz.diagram.Shape interface as follows:

connections(type: string): void;

The documentation (https://docs.telerik.com/kendo-ui/api/javascript/dataviz/diagram/shape/methods/connections) however, specifies:

Returns the connections attached to the shape. You can optionally specify to return only the incoming or outgoing connections.

Therefore, connections() should not be of type void and the type parameter should be optional.

To solve this issue, we currently cast both the parameter and the result.

I disable the zoom on a diagram by setting the zoom property to 0 and it works.

Unfortunately it crashes the pdf export with the following error:

This is a dojo where the issue reproduces: https://dojo.telerik.com/EveCAnAq

I did a quick investigation in the library and the culprit seems to be the first line of the below function. _zoom is either zero or undefined resulting in NAN. 

Bug report

When exporting a diagram as a PDF, hidden shapes still visible. 

Reproduction of the problem

1. Run this dojo - https://dojo.telerik.com/oRUPUHOb/4
2. Click on "Mask" button
3. Click on "Save as PDF"
4. Open the exported PDF file

The shape State 1 must not be present on the exported PDF