vue导出当前页面为pdf格式

1、安装html2canvas和jspdf依赖

	npm install html2canvas --save
	npm install jspdf --save  
（如果jspdf 报错，则在index.js中引入
<scriptsrc="https://cdnjs.cloudflare.com/ajax/libs/jspdf/1.3.2/jspdf.debug.js"></script>）

2、在utils中创建htmlToPdf.js文件，并复制以下代码

// 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 = "测评报告"; //pdf名称
      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
        //在画布中呈现大小，可调
        let imgWidth = 595.28    //575.28
        let imgHeight = 592.28 / contentWidth * contentHeight //582.28
        let pageData = canvas.toDataURL('image/jpeg', 1.0)
        let PDF = new jsPDF('', 'pt', 'a4')   //jsPDF要小写，因为是cdn引入，可以打开链接看源码
        if (leftHeight < pageHeight) {
     
         //(pageData, 'JPEG', 左边距 ，上边距，宽，高)
          PDF.addImage(pageData, 'JPEG', 0, 0, imgWidth, imgHeight) //10 20
        } else {
     
          while (leftHeight > 0) {
     
            PDF.addImage(pageData, 'JPEG', 0, position, imgWidth, imgHeight) //10
            leftHeight -= pageHeight
            position -= 841.89
            if (leftHeight > 0) {
     
              PDF.addPage()
            }
          }
        }
        PDF.save(title + '.pdf')
      }
      )
    }
  }
}

3.main.js中引入上面那个htmlToPdf文件

import htmlToPdf from '@/components/Utils/htmlToPdf'
Vue.use(htmlToPdf)

在vue页面中调用

 <div id="pdfDom">
 	//这里是要导出的html内容
    <el-button @click="getPdf()">保存为PDF</el-button>
 </div>