1.将页面html转换成图片
npm install html2canvas --save
2.在需要导出的页面引入
import html2canvas from 'html2canvas';
在 methods 中添加方法
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) },
导出为PDF
1.将页面html转换成图片
npm install html2canvas --save
2.将图片生成pdf
npm install jspdf --save
3.在需要导出的页面引入
import html2canvas from 'html2canvas'; import JsPDF from 'jspdf'
在 methods 中添加方法
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 }); },