window.print()方法调起浏览器打印

 
<template>
  <div><button @click="del">打印</button></div>
  <div ref="printHtml">
    <div class="wraper">
      <div>
        <table border="1px" cellspacing="0">
          <thead>
            <tr>
              <th rowspan="2">1</th>
              <th rowspan="2">2</th>
              <th rowspan="2">3</th>
              <th rowspan="2">4</th>
              <th rowspan="2">5</th>
              <th rowspan="2">6</th>
              <th rowspan="2">7</th>
              <th rowspan="2">8</th>
              <th rowspan="2">9</th>
              <th rowspan="2">0</th>
              <th rowspan="2">11</th>
              <th rowspan="2">12</th>
              <th rowspan="2">13</th>
              <th rowspan="2">14</th>
              <th rowspan="2"&