效果图如下：
核心代码如下：
chart: {type: 'line',events: {load: function () {let chart = thisconst points = []Highcharts.each(chart.series, function (s) {if (s.visible) {points.push(s.points[s.points.length - 1])}})chart.tooltip.refresh(points)},},},tooltip: {shared: true}
}
参考代码地址：https://jsfiddle.net/BlackLabel/tkdrohe7/
