前端保存页面为pdf（vue2）--简单实现

主要用到两个插件：html2canvas、jspdf。

第一步下载插件，引用

npm install html2canvas;
npm install jspdf --save



import Echarts from "./echarts.vue"
import html2canvas from 'html2canvas';

第二步定义一个按钮

 <el-button type="primary" @click="download" round>下载PDF</el-button>

第三步定义打印区域

<div id='pdf-content'>
...需要打印pdf的内容
<div>

第四步实现方法

download() {
      html2canvas(document.getElementById('pdf-content'), {
        // allowTaint: true
        useCORS: true//看情况选用上面还是下面的，
      }).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('pdf名字.pdf')
      })
    }