VChart
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VisActor
VChart, more than just a cross-platform charting library, but also an expressive data storyteller.
参考：https://echarts.apache.org/en/option.html#toolbox 
参考 echarts，https://echarts.apache.org/en/option.html#axisPointer - [ ] snap 坐标轴指示器是否自动吸附到点上。默认自动判断，这个功能在数值轴和时间轴上比较有意义，可以自动寻找细小的数值点。 - [ ] axisPointer.label.precision - [ ] axisPointer.handle，拖拽手柄，适用于触屏的环境 
### What problem does this feature solve? Expect crosshairs to display different colors in different locations ### What does the proposed API look like? ``` crosshair: { xField: { visible:...
### What problem does this feature solve? svg path cannot satisfy this style  ### What does the proposed API look like? 
