amCharts 4 是一个charts图表类工具，用于数据可视化的转到库。当您需要一个简单而强大且灵活的嵌入式数据可视化解决方案时。AMCharts 4是个不错的选择。内含多个演示。
Sankey diagram, Treemap, Chord diagram, Radar, Polar.
Classics with some new twists
Enhanced radar charts
## [4.7.4] – 2019-10-22
– New global option: `am4core.options.viewportTarget`. If you are placing charts into a scrollable container and using `onlyShowOnViewport`, set this option to a reference to the container. The system will monitor both window and individual scroll of the container to know where to reveal the lazy-loaded chart.
– New `MapChart` property: `geodataNames`. It can now be used to automatically translate country names into multiple languages. Check out [usage instructions](https://www.amcharts.com/docs/v4/tutorials/using-map-country-name-translations/).
– `hideParentColumns` property added to `TreeMap`. If set to `true` columns of the parent series will be hidden when user drills-down into deeper levels.
– `ColorSet` was starting to generate grayscale colors at some point.
– Accessibility: Series that has items with roles “menuitem” will now have its role set to “menu” automatically.
– Series bullets were dislocated on `XYChart` with `DateAxis` and `dateFormatter.utc = true`.
– In some specific cases 3D columns used incorrect `zIndex`.
– Index of dataItem of `PercentSeries` could be `-`1 after first render.
– `yRange` of `XYCursor` was inversed.