页面DOM导出PDF

location /static {
	add_header 'Access-Control-Allow-Origin' '*';
	add_header 'Access-Control-Allow-Credentials' 'true';
	index index.html;
	root  /data/wwwjarapi/8905xhkjfileapitest/;   
}

add_header 'Access-Control-Allow-Origin' '*';
add_header 'Access-Control-Allow-Credentials' 'true';

npm install html2canvas --save

npm install jspdf --save

/* eslint-disable */
import html2canvas from 'html2canvas';
import JsPDF from 'jspdf';

/**
 * @param  ele          要生成 pdf 的DOM元素（容器）
 * @param  padfName     PDF文件生成后的文件名字
 * */
function downloadPDF(ele, pdfName){
  document.documentElement.scrollTop = 0;
  html2canvas( ele, {
    dpi: 300,
    useCORS:true  //允许canvas画布内 可以跨域请求外部链接图片, 允许跨域请求。
  } ).then( (canvas)=>{
    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 = 595.28/contentWidth * contentHeight;
    var pageData = canvas.toDataURL('image/jpeg', 1.0);
    var pdf = new JsPDF('', 'pt', 'a4');
    //有两个高度需要区分，一个是html页面的实际高度，和生成pdf的页面高度(841.89)
    //当内容未超过pdf一页显示的范围，无需分页
    if (leftHeight < pageHeight) {
      //在pdf.addImage(pageData, 'JPEG', 左，上，宽度，高度)设置在pdf中显示；
      pdf.addImage(pageData, 'JPEG', 0, 0, imgWidth, imgHeight);
    } else {    // 分页
      while(leftHeight > 0) {
        pdf.addImage(pageData, 'JPEG', 0, position, imgWidth, imgHeight);
        leftHeight -= pageHeight;
        position -= 841.89;
        //避免添加空白页
        if(leftHeight > 0) {
          pdf.addPage();
        }
      }
    }
    //可动态生成
    pdf.save(pdfName);
  })
}
export default {
  downloadPDF
}

import htmlToPdf from "@/assets/js/htmlToPdf";

htmlToPdf.downloadPDF(
  document.querySelector("#myexport"),
  "小明的试卷"
);

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

export default{
  install (Vue, options) {
    Vue.prototype.getPdf = function (id,title) {
      document.documentElement.scrollTop = 0;
      html2Canvas(document.querySelector(`#${id}`), {
        // allowTaint: true
        useCORS:true//看情况选用上面还是下面的，
      }).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('', '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(title + '.pdf')
        }
      )
    }
  }
}

import htmlToPdf from '@/utils/htmlToPdf'
Vue.use(htmlToPdf)

this.getPdf('resumeId',name)

let url = canvas.toDataURL("image/png");
var oA = document.createElement("a");
oA.download = '';// 设置下载的文件名，默认是'下载'
oA.href = url;
document.body.appendChild(oA);
oA.click();
oA.remove(); // 下载之后把创建的元素删除