can you please tell which charting libraries are open source and completely free to use in a project? which drawing will be best SVG or Canvas for charts?
They are all free, they are all on github. Svg chart may offer a little bit more customization features than Canvas chart libraries. But Canvas is better for performance. If you have thousands of data points to render for your chart, then canvas charts will be faster.
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can you please tell which charting libraries are open source and completely free to use in a project? which drawing will be best SVG or Canvas for charts?
They are all free, they are all on github. Svg chart may offer a little bit more customization features than Canvas chart libraries. But Canvas is better for performance. If you have thousands of data points to render for your chart, then canvas charts will be faster.