Vue导出当前页面为PDF文件

下载插件

npm install html2canvas --save
npm install jspdf --save

创建导出函数文件htmlToPdf.js

// 导出页面为PDF格式
import html2Canvas from 'html2canvas'
import JsPDF from 'jspdf'
export default {
  install(Vue, options) {
    Vue.prototype.getPdf = function (name, id) {
      let title = name || 'index'
      html2Canvas(document.querySelector(`#${id}`), {
        allowTaint: true,
        taintTest: false,
        useCORS: true,
        dpi: window.devicePixelRatio * 4, // 将分辨率提高到特定的DPI 提高四倍
        scale: 4, // 按比例增加分辨率
        logging: true // 可以长屏分页导出
      }).then(function (canvas) {
        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(title + '.pdf')
      })
    }
  }
}

在 main.js 文件里引入并全局注册

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

页面中使用

<template>
  <div>
      <div class="btn" @click="exportPDF">
    <div class="wrapper" id="wrapper-PDF">
       ......
    </div>
  </div>
</template>
export default {
  data() {
    return {}
  },
  methods: {
    exportPDF() {
      this.getPdf('文件名称', 'wrapper-PDF')
    }
  }
}