Issue with exporting HighCharts in IRuby notebook

[Prakriti-nith]

Exporting in web frameworks is completely offline. In IRuby notebook, offline-export supports only the exporting to png, jpeg and SVG format. Export to PDF is not working (not even through the exporting button in highchart). So, online exporting is done in IRuby notebook.
Now, there is a problem in online exporting that if we run-all all the cells of IRuby notebook then only the last chart will be exported. Individually, running the cells works fine.
So, either we need to find a way to export HighChart to PDF format when offline exporting is done or we should resolve the bug in online exporting.