vue html 页面转成pdf下载

1. 安装
   npm install html2canvas jspdf --save
2. 引用
   import html2Canvas from "html2canvas"
import JsPDF from "jspdf"
3. 在触发事件里写入

  var title = 'pdf名字'
      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, position, 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')
      })

两边留边距 修改imgWidth，并且在addImage时x方向参数设置你要的边距

（35就是设置的边距）
var imgWidth = 525.28;
pdf.addImage(pageData, 'JPEG', 35, position, imgWidth, imgHeight);