hughess commented on issue #7763:
URL: https://github.com/apache/echarts/issues/7763#issuecomment-1129470048
Thanks @plainheart. As a first step to understand how it would work, I did
the following:
- Used the svg renderer as normal to create and display a chart
- Added a custom button outside of the ECharts instance - on click, the
button runs a function which:
- Generates the same chart, but using the canvas renderer
- Puts the chart into a hidden div
- Runs `getConnectedDataURL` with type = 'png'
- Uses the `download` function from the npm package `download.js` to
take the connectedDataURL and save it into a png file which is downloaded in
the browser
This must be an inefficient way of doing it, but it works for our immediate
use case. I plan to learn more about creating a temporary canvas from within
ECharts so I can contribute back to the project.
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