How does echarts implement the legend single data item plus the background color and the background image adaptation in the pie chart

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ECharts is a JavaScript-based data visualization library that provides rich chart types and interactive functions. The following is a detailed explanation of the realization principle of the single data item of the legend in ECharts plus the background color and the background image adaptation in the pie chart, as well as the explanation of the usage scenario, as well as some related literature material links and products currently using ECharts.

Implementation principle explanation:

1. Legend single data item plus background color: In ECharts, seriesthe data series can be defined through the properties in the configuration item. Each data series can have its own name, and these names are displayed in the legend. series.itemStyleTo add a background color to a single data item of the legend, it can be set through the properties in the configuration item . In itemStyle, you can set different styles for each data item, including the background color.

2. Adaptive background image in the pie chart: In ECharts, the background image of the pie chart is usually a circle, which is used to represent the background of the entire pie chart. To realize the self-adaptation of the background image, it can be set through the properties in the configuration item series. In series, you can use radiusattributes to set the radius of the pie chart to make it adaptive to the size of the container. At the same time, you can use graphicattributes to add background images&#x