Echarts饼图(环图)开启默认高亮
实现(鼠标悬浮后,让label驻留)功能
只需在myChart.setOption(options);之后添加以下代码即可:
// 默认高亮
let index = 0; // 高亮索引
myChart.dispatchAction({
type: "highlight",
seriesIndex: index,
dataIndex: index
});
myChart.on("mouseover", function(e) {
if (e.dataIndex != index) {
myChart.dispatchAction({
type: "downplay",
seriesIndex: 0,
dataIndex: index
});
}
});
myChart.on("mouseout", function(e) {
index = e.dataIndex;
myChart.dispatchAction({
type: "highlight",
seriesIndex: 0,
dataIndex: e.dataIndex
});
});