ZingChart: How do you make an overlapping bar chart with stacked bars?

To make a bar chart over lap you must must set

'plot: {
  barOverlap: '%70'
...
}'

To make a stacked bar chart you will have to add the attribute

stacked:true

To your series objects you want to stack

Example: https://demos.zingchart.com/view/OTAME4IR 

Documentation

• Stacked Bar Charts
• Plot JSON Docs