<template>
  <div class="app-container">
    <div id="printFrom">
      <el-form :ref="formRef" :model="form" :rules="validateRules">
      ...
      </el-form>
      <el-button type="info" @click="handlePrint(printData)">打印</el-button>
    </div>
  </div>
</template>

<script>

export default {
  data() {
    return {
      formRef: 'form',
      validateRules: [],
      printData: {
        printable: 'printFrom',
        header: '申請表',
        ignore: ['no-print']
      }
    }
  },
   handlePrint(params) {
     printJS({
       printable: params.printable, // 'printFrom', // 標簽元素id
       type: params.type || 'html',
       header: params.header, // '表單',
       targetStyles: ['*'],
       style: '@page {margin:0 10mm};', // 可選-打印時去掉眉頁眉尾
       ignoreElements: params.ignore || [], // ['no-print']
       properties: params.properties || null
     })
   }
 }
}
</script>

printJS('docs/printjs.pdf')
// 或
printJS({printable:'docs/printjs.pdf', type:'pdf', showModal:true})

printJS('images/print-01-highres.jpg', 'image')
// 或
printJS({printable: 'images/print-01-highres.jpg', type: 'image', header: 'My cool image header'})

printJS({
printable: ['images/print-01-highres.jpg', 'images/print-02-highres.jpg', 'images/print-03-highres.jpg'],
type: 'image',
header: 'Multiple Images',
imageStyle: 'width:50%;margin-bottom:20px;'
})

 someJSONdata = [
    {
       name: 'John Doe',
       email: 'john@doe.com',
       phone: '111-111-1111'
    },
    {
       name: 'Barry Allen',
       email: 'barry@flash.com',
       phone: '222-222-2222'
    },
    {
       name: 'Cool Dude',
       email: 'cool@dude.com',
       phone: '333-333-3333'
    }
 ]
 
printJS({
    printable: someJSONdata,
    properties: ['name', 'email', 'phone'],
    type: 'json',
    gridHeaderStyle: 'color: red;  border: 2px solid #3971A5;',
    gridStyle: 'border: 2px solid #3971A5;'
})