Please wait till all the chart loads to start batch export of charts. After export, you can save either individual charts or all charts together in the UI below.
Each chart below shows yearly coffee sales data from each worksheet from my Google Spreadsheet.
NOTE: I have used Goessner’s excellent jsonT library to parse JSON. have modified some part of jsonT to accomodate json properties
having $ in key names. I replaced the standard jsonT shortcut $ with # to cope
with this issue where the property names in JSON data contains $.