Add export button of frappe chart in erpnext script report

[alkuhlani]

I have a script report with frappe chart,

Now, I would like to add an export button to enable downloading the chart.
I found how to do it in this page Exporting to images
but I can not add this code “chart.export();” in the js

[himanshu_013]

I want the same any update on this ?