工具包

html2canvas：将页面html转canvas
jspdf：根据canvas生成的图片导出pdf

官网

GitHub - parallax/jsPDF: Client-side JavaScript PDF generation for everyone.Client-side JavaScript PDF generation for everyone. - parallax/jsPDFhttps://github.com/parallax/jsPDF

示例代码

import html2canvas from "html2canvas";
import jsPDF from "jspdf";

export const downloadPDF = (page, name) => {
    html2canvas(page).then(function (canvas) {
        canvas2PDF(canvas, name);
    });
};

const canvas2PDF = (canvas, name) => {
    let contentWidth = canvas.width;
    let contentHeight = canvas.height;

    //a4纸的尺寸[595.28,841.89]，html页面生成的canvas在pdf中图片的宽高
    let imgWidth = 455.28;
    let imgHeight = 455.28 / contentWidth * contentHeight;

    // 第一个参数： l：横向  p：纵向
    // 第二个参数：测量单位（"pt"，"mm", "cm", "m", "in" or "px"）
    let pdf = new jsPDF("p", "pt");

    pdf.addImage(
        canvas.toDataURL("image/jpeg", 1.0),
        "JPEG",
        70,
        30,
        imgWidth,
        imgHeight
    );
    if (!name) name = '导出'
    pdf.save(name + ".pdf");
};