解决Vue + Echarts 使用markLine标线(precision精度问题)

<script>
 import echarts from 'echarts/lib/echarts'
</script>

<script>
 import echarts from 'echarts/lib/echarts'
 import 'echarts/lib/component/markLine'
</script>

 import echarts from 'echarts/lib/echarts'
 import 'echarts/lib/chart/candlestick'
 import 'echarts/lib/chart/bar'
 import 'echarts/lib/component/legend'
 import 'echarts/lib/component/title'
 import 'echarts/lib/component/markLine'

let price = [13.9, 14.95, 16];

markLine: {
 symbol: 'none',
 silent: true,
 data: [
 {yAxis: price[0]},
 {yAxis: price[1]},
 {yAxis: price[2]}
 ],
 lineStyle: {
 show: true,
 color: '#808C94',
 type: 'dashed'
 }
}

markLine: {
 symbol: 'none',
 silent: true,
 data: [
  {yAxis: price[0]},
  {yAxis: price[1]},
  {yAxis: price[2]}
 ],
 lineStyle: {
  show: true,
  color: '#808C94',
  type: 'dashed'
 },
 // 先让markLine精确到3，默认为2
 precision: 3,
 label: {
  formatter: function(value) {
   // 确保你的Number.toFixed(2)是满足要求的
  return value.value.toFixed(2);
  }
 }
}

markLine: {
 symbol: 'none',
 silent: true,
 data: [
  {yAxis: price[0]},
  {yAxis: price[1]},
  {yAxis: price[2]}
 ],
 lineStyle: {
  show: true,
  color: '#808C94',
  type: 'dashed'
 },
 // 先让markLine精确到3，默认为2
 precision: 3,
 label: {
  // 没有写通用代码了，针对性解决一下当前问题
  formatter: function(value) {
   // 这里的value 是一个label对象，使用value.value获取到真正的值
   let strVal = value.value.toString();
   let splitStr = strVal.split('.');
   let tailStr = splitStr[1];
   if (tailStr == null) {
    return value.value.toString() + '.00';
   }
  // 0.995 ~ 0.999 = 1
  if (tailStr >= 995) {
  return (parseInt(splitStr[0]) + 1).toString() + '.00';
  }
   if (tailStr.length >= 3) {
    let lastStr = tailStr.substr(2, 1);
    // 解决toFixed(2)方法四舍五入无效
    if (lastStr >= 5) {
     // 数值+101有些取巧，但能解决问题...
     tailStr = (parseInt(tailStr.substr(0, 2)) + 101).toString().substr(1, 2);
     return splitStr[0] + '.' + tailStr;
    } else {
     return splitStr[0] + '.' + tailStr.substr(0, 2);
    }
   } else if (tailStr.length === 1) {
    return value.value.toString() + '0';
   } else {
    return value.value.toString();
   }
  }
 }
}