vuejs将网页中指定div转成pdf并下载

1、思路：先将页面html转换成图片，再将图片生成pdf后下载。

2、安装：

//页面html转换成图片
npm install --save html2canvas
//图片生成pdf
npm install jspdf --save

3、组件引入

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

4、方法

getHtmlCanvas(){
  var title = this.title;
  html2Canvas(document.querySelector('#divPdf'), {
    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 divPdf = new JsPDF('', 'pt', 'a4')
    if (leftHeight < pageHeight) {
      divPdf.addImage(pageData, 'JPEG', 0, 0, imgWidth, imgHeight)
    } else {
      while (leftHeight > 0) {
        divPdf.addImage(pageData, 'JPEG', 0, position, imgWidth, imgHeight)
        leftHeight -= pageHeight
        position -= 841.89
        if (leftHeight > 0) {
          divPdf.addPage()
        }
      }
    }
    divPdf.save(title + '.pdf')
  }
  )
}

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