vue pdf下载

主要技术栈是Vue，两个库： 

    html2canvas npm地址

    jspdf 

具体实现代码如下：

<template>
  <div class="priview_resume_container">
        <div style="font-size: 16px" @click="getResume">点这里下载 </div>
  </div>
</template>

<script>
  export default {
    name: 'priviewResume',
    methods: {
      getResume() {
        this.commonUtils.generateResume(
          $('.priview_resume_container')[0],
          '测试'
        )
      }
    },
    components: {}
  }
</script>

import html2canvas from 'html2canvas'
import JsPDF from 'jspdf'
export const generateResume = (el, name) => {
  html2canvas(el).then(canvas => {
    let contentWidth = canvas.width
    let contentHeight = canvas.height
    //一页pdf显示html页面生成的canvas高度;
    let pageHeight = (contentWidth / 592.28) * 841.89
    //未生成pdf的html页面高度
    let leftHeight = contentHeight
    //页面偏移
    let position = 0
    //a4纸的尺寸[595.28,841.89]，html页面生成的canvas在pdf中图片的宽高
    let imgWidth = 595.28
    let imgHeight = (592.28 / contentWidth) * contentHeight
    let pageData = canvas.toDataURL('image/jpeg', 1.0)
    let pdf = new JsPDF('', 'pt', 'a4')
    //有两个高度需要区分，一个是html页面的实际高度，和生成pdf的页面高度(841.89)
    //当内容未超过pdf一页显示的范围，无需分页
    if (leftHeight < pageHeight) {
      pdf.addImage(pageData, 'JPEG', 0, 0, imgWidth, imgHeight)
    } else {
      while (leftHeight > 0) {
        //arg3-->距离左边距;arg4-->距离上边距;arg5-->宽度;arg6-->高度
        pdf.addImage(pageData, 'JPEG', 0, position, imgWidth, imgHeight)
        leftHeight -= pageHeight
        position -= 841.89
        //避免添加空白页
        if (leftHeight > 0) {
          //添加新页
          pdf.addPage()
        }
      }
    }
    pdf.save(`${name}.pdf`)
  })
}

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