Steps to Reproduce

Load a page including a chart

Current Result

chart.wpd contains all content from the zk.wpd provided in chart package

Expected Result

on-demand client-side exporting libraries are only loaded if the browser request them

Debug Information

https://www.highcharts.com/docs/export-module/client-side-export
https://api.highcharts.com/highcharts/exporting.libURL

Highcharts includes external libraries for client-side exporting.
These libraries include CanVG, jsPDF and svg2pdf.js,

In a standard highcharts (JS + html) deployement, these libraries are loaded on demand if the specific client request them. (canvg is used as a sort of polyfill for IE exporting PNGs for example)

In ZKChart, these external libraries are front loaded

In addition, canvg modifies the Array.from function.
This causes incompatibilities with google maps API v4, so loading it by default is counter-productive.

Highcharts provide a libURL option which can be used to target the folder containing the JS files for the libraries.
This should point out to zkau/web/[hash]/js/chart/ext/lib/ which is the location of these files in ZK charts

Workaround

There are 2 possible workarounds

Version replacement in gmap (for gmap compatibility specifically)

First possible workaround, use a lower API version for gmaps

<gmaps version="3.25" ...

patch in charts

2nd possible workaround, zk.wpd replacement for chart
attached replacement for /src/main/resources/web/js/chart/zk.wpd
+
declare libURI in java config

chart.getExporting().addExtraAttr("libURL",new org.zkoss.json.JavaScriptValue("'"+Executions.getCurrent().getContextPath() + "/zkau/web/_zv11.2.0.0/js/chart/ext/lib/'"));