npm install html2canvas jspdf

import html2canvas from 'html2canvas';
import jsPDF from 'jspdf';

export function getPdf(elementId, pdfName) {
    const element = document.getElementById(elementId);
    
    html2canvas(element, {
        useCORS: true, // 允许跨域请求外部链接图片
        allowTaint: true // 允许canvas污染
    }).then(canvas => {
        const contentWidth = canvas.width;
        const contentHeight = canvas.height;
        
        const pageHeight = contentWidth / 592.28 * 841.89;
        let leftHeight = contentHeight;
        let position = 0;
        const imgWidth = 595.28;
        const imgHeight = (contentHeight * imgWidth) / contentWidth;
        
        const pageData = canvas.toDataURL('image/jpeg', 1.0);
        
        const 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(pdfName + '.pdf');
    }).catch(error => {
        console.error('Error during PDF generation:', error);
    });
}

<template>
    <div>
        <!-- 要导出的内容 -->
        <div id="exportContent">
            <!-- 这里放置要导出的HTML内容 -->
        </div>
        <!-- 导出按钮 -->
        <el-button type="primary" @click="exportPdf">导出PDF</el-button>
    </div>
</template>

<script>
import { getPdf } from './htmlToPdf'; // 引入导出的函数

export default {
    methods: {
        exportPdf() {
            getPdf('exportContent', '导出的文件名'); // 调用导出函数，并传入要导出的DOM元素的ID和PDF文件名
        }
    }
}
</script>