先安装支持

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

组件引用：

//将特定部分转成pdf并下载

    getPdf () {

      var title = this.title;

      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')

      }

      )

    },