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) * 841.89;     //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[595.28,841.89]，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 -= 841.89;       if (leftHeight > 0) {        PDF.addPage();       }      }     }     PDF.save(name + ".pdf"); // 这里是导出的文件名    });   },