前端PDF导出，使用html2Canvas和jsPDF插件

import html2Canvas from "html2canvas";
import jsPDF from "jspdf";
export function downloadPDF(dom, filename) {
  const scale = 2;
  window.pageYOffset = 0;
  // 滚动到顶部，避免打印不全
  document.documentElement.scrollTop = 0;
  document.body.scrollTop = 0;
  html2Canvas(dom, {
    allowTaint: true, 
    scale, 
  }).then((canvas) => {
    console.log("canvas", canvas);
    const contentWidth = canvas.width / scale;
    const contentHeight = canvas.height / scale;
    const pdf = new jsPDF("", "pt", [contentWidth, contentHeight]);
    const pageData = canvas.toDataURL("image/jpeg", 1.0);
    pdf.addImage(pageData, "JPEG", 0, 0, contentWidth, contentHeight);
    pdf.save(`${filename}.pdf`);
  });
}