Apache ECharts

Apache ECharts is an open source JavaScript visualization library that provides over 20 chart types and 10-plus interactive components for building data dashboards, analytics platforms, and visual reporting tools. The project is maintained under the Apache Software Foundation and was originally developed at Baidu by the ECharts Front End team before being donated to Apache in 2018. The current release is version 6.1, published in 2026. ECharts implements a dual rendering engine supporting both Canvas and SVG output, switchable with a single configuration property, and uses incremental rendering and streaming data loading techniques to maintain smooth interactivity with datasets exceeding 10 million data points. The chart library covers standard visualizations including line, bar, scatter, pie, radar, candlestick, heatmap, graph, tree, treemap, sunburst, parallel, sankey, funnel, gauge, and theme river charts, plus geographic visualizations with built-in map projections and GeoJSON support. Charts can be combined arbitrarily through the series and grid configuration, enabling multi-panel dashboards within a single canvas instance. The data analysis layer provides built-in data filtering, clustering, regression, and transform operations through the dataset API, allowing multiple chart views to reference a single data source with different filter criteria. Accessibility features include intelligent chart descriptions and decal patterns for colorblind and visually impaired users, following WCAG guidelines. An academic paper on ECharts was published in the Visual Informatics journal in 2018, documenting the rendering architecture and performance optimization strategies. The project has over 60,000 GitHub stars and is licensed under the Apache License 2.0, with an active community contributing themes, extensions, and third-party framework bindings for React, Vue, and Angular.