Vue将页面导出为图片或者PDF

npm install html2canvas --save

import html2canvas from 'html2canvas';

dataURLToBlob(dataurl) {//ie 图片转格式
 var arr = dataurl.split(','), mime = arr[0].match(/:(.*?);/)[1],
 bstr = atob(arr[1]), n = bstr.length, u8arr = new Uint8Array(n);
 while (n--) {
 u8arr[n] = bstr.charCodeAt(n);
 }
 return new Blob([u8arr], {type: mime})
 },
 downloadResult(name) {
 let canvasID = document.body
 let a = document.createElement('a');
 html2canvas(canvasID).then(canvas => {
 let dom = document.body.appendChild(canvas);
 dom.style.display = "none";
 a.style.display = "none";
 document.body.removeChild(dom);
 let blob = this.dataURLToBlob(dom.toDataURL("image/png"));
 a.setAttribute("href", URL.createObjectURL(blob));
 a.setAttribute("download", name + ".png")
 document.body.appendChild(a);
 a.click();
 URL.revokeObjectURL(blob);
 document.body.removeChild(a);
 });
 },
 printOut(name) {
 // 个人观察只是截取可见范围以及以下的区域，所以先将滚动条置顶
 $(window).scrollTop(0); // jQuery 的方法
 document.body.scrollTop = 0; // IE的
 document.documentElement.scrollTop = 0; // 其他
 this.downloadResult(name)
 },

npm install html2canvas --save

npm install jspdf --save

import html2canvas from 'html2canvas';
import JsPDF from 'jspdf'

printOut(name) {
 let shareContent = document.body,//需要截图的包裹的（原生的）DOM 对象
 width = shareContent.clientWidth, //获取dom 宽度
 height = shareContent.clientHeight, //获取dom 高度
 canvas = document.createElement("canvas"), //创建一个canvas节点
 scale = 2; //定义任意放大倍数 支持小数
 canvas.width = width * scale; //定义canvas 宽度 * 缩放
 canvas.height = height * scale; //定义canvas高度 *缩放
 canvas.style.width = shareContent.clientWidth * scale + "px";
 canvas.style.height = shareContent.clientHeight * scale + "px";
 canvas.getContext("2d").scale(scale, scale); //获取context,设置scale
 let opts = {
 scale: scale, // 添加的scale 参数
 canvas: canvas, //自定义 canvas
 logging: false, //日志开关，便于查看html2canvas的内部执行流程
 width: width, //dom 原始宽度
 height: height,
 useCORS: true, // 【重要】开启跨域配置
 };

 html2Canvas(shareContent, opts).then(() => {
 var contentWidth = canvas.width;
 var contentHeight = canvas.height;
 //一页pdf显示html页面生成的canvas高度;
 var pageHeight = (contentWidth / 592.28) * 841.;
 //未生成pdf的html页面高度
 var leftHeight = contentHeight;
 //页面偏移
 var position = 0;
 //a4纸的尺寸[595.28,841.]，html页面生成的canvas在pdf中图片的宽高
 var imgWidth = 595.28;
 var imgHeight = (592.28 / contentWidth) * contentHeight;
 var pageData = canvas.toDataURL("image/jpeg", 1.0);
 var 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.;
 if (leftHeight > 0) {
 PDF.addPage();
 }
 }
 }
 PDF.save(name + ".pdf"); // 这里是导出的文件名
 });
 },