vue 页面

 <el-button @click="testPdf">导出PDF文件</el-button>
 <div id="container" >
   <el-button type="danger">危险按钮</el-button>
   <span>{{ t1 }}</span>
 </div>

js代码

methods: {
 testPdf() {
    // this.dialogVisible = true;
    window.scrollTo(0, 0);
    this.t1 = '666';
    this.$nextTick(()=>{
      this.getPdf();
    })
  },
},

htmlToPdf.js

// 导出页面为PDF格式
import html2Canvas from 'html2canvas';
import JsPDF from 'jspdf';
export default {
    install(Vue) {
        Vue.prototype.getPdf = function () {
            var title = 'test';
            html2Canvas(document.querySelector('#container'), {
                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');
            })
        }
    }
}

index.js
目录： plugin/index.js

import Vue from 'vue';
import htmlToPdf from './htmlToPdf';
Vue.use(htmlToPdf);

main.js

import './plugin/jspdf';

有问题请留言。