vue纯前端实现将页面导出为pdf和word文件

npm i html2canvas jspdf -S

import html2Canvas from 'html2canvas'
import JsPDF from 'jspdf'

html2Canvas(document.querySelector('#pdfDom'), {
  allowTaint: true
}).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('p', '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('导出文件名.pdf')
})

npm i html2canvas docxtemplater pizzip jszip-utils jszip file-saver angular-expressions image-size docxtemplater-image-module-free -S

import PizZip from 'pizzip'
import Docxtemplater from 'docxtemplater'
import JSZipUtils from 'jszip-utils'
import { saveAs } from 'file-saver'

/**
 * 将base64格式的数据转为ArrayBuffer
 * @param {Object} dataURL base64格式的数据
 */
function base64DataURLToArrayBuffer(dataURL) {
  const base64Regex = /^data:image/(png|jpg|jpeg|svg|svg+xml);base64,/
  if (!base64Regex.test(dataURL)) {
    return false
  }
  const stringBase64 = dataURL.replace(base64Regex, '')
  let binaryString
  if (typeof window !== 'undefined') {
    binaryString = window.atob(stringBase64)
  } else {
    binaryString = new Buffer(stringBase64, 'base64').toString('binary')
  }
  const len = binaryString.length
  const bytes = new Uint8Array(len)
  for (let i = 0; i < len; i++) {
    const ascii = binaryString.charCodeAt(i)
    bytes[i] = ascii
  }
  return bytes.buffer
}

/**
 * 导出word,支持图片
 * @param {Object} tempDocxPath 模板文件路径
 * @param {Object} wordData 导出数据
 * @param {Object} fileName 导出文件名
 * @param {Object} imgSize 自定义图片尺寸
 */
export const exportWord = (tempDocxPath, wordData, fileName, imgSize) => {
  // 这里要引入处理图片的插件
  var ImageModule = require('docxtemplater-image-module-free')

  const expressions = require('angular-expressions')

  // 读取并获得模板文件的二进制内容
  JSZipUtils.getBinaryContent(tempDocxPath, function(error, content) {
    if (error) {
      throw error
    }

    expressions.filters.size = function(input, width, height) {
      return {
        data: input,
        size: [width, height]
      }
    }

    // function angularParser (tag) {
    //   const expr = expressions.compile(tag.replace(/'/g, "'"));
    //   return {
    //     get (scope) {
    //       return expr(scope);
    //     },
    //   };
    // }

    // 图片处理
    let opts = {}

    opts = {
      // 图像是否居中
      centered: false
    }

    opts.getImage = (chartId) => {
      // console.log(chartId);//base64数据
      // 将base64的数据转为ArrayBuffer
      return base64DataURLToArrayBuffer(chartId)
    }

    opts.getSize = function(img, tagValue, tagName) {
      // console.log(img);//ArrayBuffer数据
      // console.log(tagValue);//base64数据
      // console.log(tagName);//wordData对象的图像属性名
      // 自定义指定图像大小
      if (Object.prototype.hasOwnProperty.call(imgSize, tagName)) {
        return imgSize[tagName]
      } else {
        return [600, 350]
      }
    }

    // 创建一个PizZip实例，内容为模板的内容
    const zip = new PizZip(content)
    // 创建并加载docxtemplater实例对象
    const doc = new Docxtemplater()
    doc.attachModule(new ImageModule(opts))
    doc.loadZip(zip)

    doc.setData(wordData)

    try {
      // 用模板变量的值替换所有模板变量
      doc.render()
    } catch (error) {
      // 抛出异常
      const e = {
        message: error.message,
        name: error.name,
        stack: error.stack,
        properties: error.properties
      }
      console.log(JSON.stringify({
        error: e
      }))
      throw error
    }

    // 生成一个代表docxtemplater对象的zip文件（不是一个真实的文件，而是在内存中的表示）
    const out = doc.getZip().generate({
      type: 'blob',
      mimeType: 'application/vnd.openxmlformats-officedocument.wordprocessingml.document'
    })
    // 将目标文件对象保存为目标类型的文件，并命名
    saveAs(out, fileName)
  })
}

import html2Canvas from 'html2canvas'
import { exportWord } from '@/utils/exportFile'

const fileUrl = window.location.href.split('#')[0].replace('index.html', '') + 'data/doc/report-model.docx' // 存在public下的模版文件
html2Canvas(document.querySelector('#abnormalChartExp' + p.value), {
  allowTaint: true
}).then(function(canvas) {
  const contentWidth = canvas.width
  const contentHeight = canvas.height
  const imgWidth = 595.28
  const imgHeight = 592.28 / contentWidth * contentHeight
  const pageData = canvas.toDataURL('image/jpeg', 1.0)
  // console.log(pageData)
  const imgSize = {
    imgUrl: [imgWidth, imgHeight] // 控制导出的word图片大小，宽度铺满
  }
  exportWord(fileUrl, { imgUrl: pageData }, `demo.docx`, imgSize)
})