vue中html导出成word

vue 中将 html 中内容转换为 word 文档导出，无需模板，可以导出 echarts 图表。

使用 html-docx-js、file-saver 。

先将html中内容获取，之后将页面上的元素转成图片,然后把图片放到word文件中进行导出。

参考链接：https://blog.csdn.net/weixin_47494533/article/details/137018678

https://www.jb51.net/javascript/300311dk9.htm

1、引用

1 2	`npm install html-docx-js --save` `npm install file-saver --save`

2、创建 exportToWord.js，添加导出方法

// exportToWord.js
 
import htmlDocx from 'html-docx-js/dist/html-docx';
import saveAs from 'file-saver';
 
/**
 * 导出html为word
 * @param fileName 导出文件名
 * @param elementClass 导出块的class
 */
export function exportToWord(fileName, elementClass) {
  //.export-box 需要转word的最大dom盒子的类名
  const app = document.querySelector(elementClass);
  const cloneApp = app.cloneNode(true);
  const canvases = app.getElementsByTagName('canvas');
  const cloneCanvases = cloneApp.getElementsByTagName('canvas');
 
  const promises = Array.from(canvases).map((ca, index) => {
    return new Promise((res) => {
      const url = ca.toDataURL('image/png', 1);
      const img = new Image();
      img.onload = () => {
        URL.revokeObjectURL(url);
        res();
      };
      img.src = url;
      // 生成img插入clone的dom的canvas之前
      cloneCanvases[index].parentNode.insertBefore(
        img,
        cloneCanvases[index],
      );
   });
  });
  // 移除原来的canvas
  const cloneCanvas = cloneApp.getElementsByTagName('canvas');
  Array.from(cloneCanvas).forEach((ca) => ca.parentNode.removeChild(ca));
 
  Promise.all(promises).then(() => {
    convertImagesToBase64(cloneApp);
     const converted = htmlDocx.asBlob(`
                   <html xmlns:o=\'urn:schemas-microsoft-com:office:office\' xmlns:w=\'urn:schemas-microsoft-com:office:word\' xmlns=\'http://www.w3.org/TR/REC-html40\'><head><style>
                   ${document.head.outerHTML}
                   </head>
                   <body>
                   ${cloneApp.outerHTML}
                   </body>
                   </html>`);
     saveAs(converted, fileName);
  });
 
}
 
/**
 * 将image转换成base64
 * @param cloneApp
 */
 function convertImagesToBase64(cloneApp){
  let regularImages = cloneApp.getElementsByTagName('img');
  let canvas = document.createElement('canvas');
  let ctx = canvas.getContext('2d');
 
  for (let index = 0; index < regularImages.length; index++) {
    canvas.width = regularImages[index].width;
    canvas.height = regularImages[index].height;
    ctx.drawImage(
      regularImages[index],
      0,
      0,
      regularImages[index].width * 0.8,
      regularImages[index].height * 0.8,
    );
    let ext = regularImages[index].src
      .substring(regularImages[index].src.lastIndexOf('.') + 1)
      .toLowerCase();
    let dataURL = canvas.toDataURL('image/' + ext);
    regularImages[index].setAttribute('src', dataURL);
  }
  canvas.remove();
}

　3、调用方法

<template>
  <div>
    <div>
      <el-row>
        <button type="button" @click="exportWord1">导出word</button>
      </el-row>
 
      <div id="contentDom" style="text-align: center" class="export-box">
         <div>内容</div>
 
      </div>
 
    </div>
  </div>
</template>
 
<script>
  import { exportToWord } from '@/utils/feature/exportToWord';
 
    export default {
      name: "exportToWord",
      data() {
        return {
 
        }
      },
      methods: {
        // html转为word
        exportWord1() {
          exportToWord('test.docx', '.export-box');
        },
 
      }
    }
</script>
 
<style scoped>
 
</style>