本文方法是html2canvas + jspdf

下载html2canvas、jspdf

创建htmlToPdf.js文件

import html2Canvas from 'html2canvas'
import JsPDF from 'jspdf'
import { Loading } from 'element-ui'
let loading
export default {
  install(Vue, options) {
    // 传入文件名，id名
    Vue.prototype.getPdf = function(pdfTitle, id) {
      loading = Loading.service({
        lock: true,
        text: '正在下载pdf...',
        background: 'rgba(255, 255, 255, 0.5)'
      })
      html2Canvas(document.querySelector(id), {
        allowTaint: true,
        useCORS: true
      }).then(function(canvas) {
        loading.close()
        let contentWidth = canvas.width
        let contentHeight = canvas.height
        let pageHeight = (contentWidth / 592.28) * 841.89
        let leftHeight = contentHeight
        let position = 0
        let imgWidth = 595.28
        let imgHeight = (592.28 / contentWidth) * contentHeight
        let pageData = canvas.toDataURL('image/jpeg', 1.0)
        let PDF = new JsPDF('', 'pt', 'a4')
        if (leftHeight < pageHeight) {
          PDF.addImage(pageData, 'JPEG', 0, 0, imgWidth, imgHeight)
        } else {
          while (leftHeight > 0) {
            PDF.addImage(pageData, 'JPEG', 0, position, imgWidth, imgHeight)
            leftHeight -= pageHeight
            position -= 841.89
            if (leftHeight > 0) {
              PDF.addPage()
            }
          }
        }
        PDF.save(pdfTitle + '.pdf')
      })
    }
  }
}

main.js中引入htmlToPdf.js文件

import htmlToPdf from '../src/utils/htmlToPdf'
Vue.use(htmlToPdf)

使用

<el-button type="primary" @click="getPdf('背景信息', '#trade-contract-print')">下载背景信息</el-button>