javascript - Render three charts to the same div to save them as one image? -

i have 3 pie charts display 3 different values. @ moment sent 3 different containers, appearing in row using bootstrap give each container div 3 column layout.

i want save image of charts, , can attaching functionality each container separately. results in 3 saved images on own mean little, without context of other charts.

i have managed send 3 charts 1 div container, problem render on top of 1 another, despite setting options follows:

options: {     chartarea: {left: 20},     backgroundcolor: {fill: 'transparent'},     ...     } 

i still seeing 1 chart appearing. there anyway around this?