vue实现pdf导出解决生成canvas模糊等问题(推荐)

// 导出页面为PDF格式
 import html2Canvas from 'html2canvas'
 import JsPDF from 'jspdf'
 export default{
  install (Vue, options) {
   Vue.prototype.getPdf = function () {
    var title = this.htmlTitle
    html2Canvas(document.querySelector('#pdfDom'), {
     allowTaint: true
    }).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 '@/components/utils/htmlToPdf'
 Vue.use(htmlToPdf)

 <div class="row" id="pdfDom" style="padding-top: 55px;background-color:#fff;">
   //给自己需要导出的ui部分.定义id为"pdfDom".此部分将就是pdf显示的部分
 </div>
 <button type="button" class="btn btn-primary"v-on:click="getPdf()">导出PDF</button>
 export default {
  data () {
    return {
    htmlTitle: '页面导出PDF文件名'
    }
  }
 }

// 导出页面为PDF格式
 import html2Canvas from 'html2canvas'
 import JsPDF from 'jspdf'
 export default{
  install (Vue, options) {
   Vue.prototype.getPdf = function (dom,title) {
    var title = title
    var c = document.createElement("canvas")
    var opts = {
     scale: 2, 
     canvas: c, 
     logging: true, 
     width: document.querySelector(dom).width, 
     height: document.querySelector(dom).height 
    };
    c.width = document.querySelector(dom).width * 2
    c.height = document.querySelector(dom).height * 2
    c.getContext("2d").scale(2, 2);
    html2Canvas(document.querySelector(dom), opts).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')
    }
    )
   }
  }
 }