vue3 生成pdf

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


function  generatePDF() {
  const array = document.getElementsByClassName('draggable')
  const content = array[0]
  loading.value=true

  html2canvas(content,{
    scale: 2, // 提高渲染质量（但也会增加文件大小）
  }).then(canvas => {
    const imgData = canvas.toDataURL('image/png',1);
    const width=content.offsetWidth
    const height=content.offsetHeight
    // 计算缩放比例（不会）


    const pdf = new jsPDF({
      // orientation: 'landscape',
      orientation: 'portrait',
      unit: 'px',
      format:[canvas.width, canvas.height],
      // format: 'a1',
    });
    loading.value=false
    pdf.addImage(imgData, 'PNG', 0, 0, canvas.width, canvas.height);
    pdf.save('推荐图谱.pdf');
  });
}