Vue use jsPdf pages exported to pdf file

1, we want to add two module

① first. Convert html page into a picture

npm install --save html2canvas 

② second. The picture generated pdf

npm install jspdf --save

2, define a global function .. htmlToPdf.js create a file in the specified location. Personally, I used to put ( 'src / components / utils / htmlToPdf')

file path:

Link: https: //pan.baidu.com/s/1M6cXXSbMLGrVpe-auk_tzQ
extraction code: zkbc

Add the following method to be exported page

// 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')
      }
      )
    }
  }

3, use the function we defined in the file main.js in.

 

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

4, pages in the exported needed .. call our getPdf method can be.

E.g:

<El-button @ click = "getPdf"> Export PDF file </ el-button>

5, pay attention

vue.js use jspdf1.5.2 version does not support addImage method, 1.5.3 version support