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    Type:New Feature 
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    Resolution: Done
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    Priority:Normal 
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    Affects Version/s: 2.1.1
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    Security Level: Jimmy
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    None
According to http://www.highcharts.com/docs/export-module/client-side-export, Highcharts supports client-side exporting. But the http://code.highcharts.com/4.1.8/modules/offline-exporting.js is only available since 4.1.8 and cannot work correctly with the current version.
workaround
use another client-side export plugin http://a----.github.io/highcharts-export-clientside/#installation
<zk> <script type="text/javascript" src="http://gabelerner.github.io/canvg/rgbcolor.js"></script> <script type="text/javascript" src="http://gabelerner.github.io/canvg/StackBlur.js"></script> <script type="text/javascript" src="http://gabelerner.github.io/canvg/canvg.js"></script> <script defer="true" src="highcharts-export-clientside.js"></script> <div apply="org.zkoss.zkcharts.essentials.PluginComposer" > <charts id="mychart" type="pie"/> </div> </zk>