markLine警戒线

series: [
 {
   type: 'line',
   data: [120, 200, 150, 80, 70, 110, 130],
   areaStyle: {
     opacity: 0.5
   },
   symbol: 'circle',
   itemStyle: {
     normal: {
       lineStyle: {
         width: 1
       }
     }
   },
   markLine: {
     symbol: "none",               //去掉警戒线最后面的箭头
     label: {
       position: "middle",         //将警示值放在哪个位置，三个值“start”,"middle","end"  开始  中点 结束
       // formatter: "PH警戒线(8.5)"
       formatter: this.name + "警戒线(" + this.criticality + ")"
     },
     data: [{
       silent: false,             //鼠标悬停事件  true没有，false有
       lineStyle: {               //警戒线的样式  ，虚实  颜色
         type: "solid",
         color: "#efeced"
       },
       // yAxis: "8.5"     //警戒线在y轴的坐标
       yAxis: String(this.criticality)
     }]
   }
 },
],