plainheart commented on issue #21693:
URL: https://github.com/apache/echarts/issues/21693#issuecomment-5014957686
Thank you for raising this feature request. Exporting CSV data is indeed a
common requirement for dashboards and analytics applications.
To avoid bundling CSV, PDF, XLSX, and their potential third-party
dependencies into the ECharts core package, I suggest a plugin-based approach:
ECharts core would expose stable extension points for export capabilities and
Toolbox features, while an independent `export-toolbox` package would provide
image, CSV, PDF, and other exporters on demand. The plugin could support both a
UI entry such as `toolbox.feature.exportData` and a programmatic API such as
`exportChart(chart, { format: 'csv', ... })`, with both paths sharing the same
export implementation.
The CSV data source should remain explicit and configurable, for example, by
accepting table data directly or a `getTable()` callback. In the future,
ECharts core could also expose a stable read-only data snapshot API to cover
more complex cases involving `dataset`, transforms, encodes, and multiple
series. This would address the `saveAsCSV` use case while preventing the core
bundle and API surface from growing indefinitely as more export formats are
requested.
Related issues: #21038 #5644 #15250 #18979 #20142 #5825 #5181
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