它适用于html2canvas和jspdf。

var imgData = canvas.toDataURL('image/png');
var imgWidth = 210; 
var pageHeight = 295;  
var imgHeight = canvas.height * imgWidth / canvas.width;
var heightLeft = imgHeight;
var doc = new jsPDF('p', 'mm');
var position = 10; // give some top padding to first page

doc.addImage(imgData, 'PNG', 0, position, imgWidth, imgHeight);
heightLeft -= pageHeight;

while (heightLeft >= 0) {
  position += heightLeft - imgHeight; // top padding for other pages
  doc.addPage();
  doc.addImage(imgData, 'PNG', 0, position, imgWidth, imgHeight);
  heightLeft -= pageHeight;
}
doc.save( 'file.pdf');

我用这个方法

function makePDF(){
var quotes = document.getElementById('container-fluid');
html2canvas(quotes, {
    onrendered: function(canvas) {
    //! MAKE YOUR PDF
    var pdf = new jsPDF('p', 'pt', 'a4');

    for (var i = 0; i <= quotes.clientHeight/980; i++) {
        //! This is all just html2canvas stuff
        var srcImg  = canvas;
        var sX      = 0;
        var sY      = 1120*i; // start 980 pixels down for every new page
        var sWidth  = 778;
        var sHeight = 1120;
        var dX      = 0;
        var dY      = 0;
        var dWidth  = 778;
        var dHeight = 1120;

        window.onePageCanvas = document.createElement("canvas");
        onePageCanvas.setAttribute('width', 778);
        onePageCanvas.setAttribute('height', 1120);
        var ctx = onePageCanvas.getContext('2d');
        // details on this usage of this function: 
        // https://developer.mozilla.org/en-US/docs/Web/API/Canvas_API/Tutorial/Using_images#Slicing
        ctx.drawImage(srcImg,sX,sY,sWidth,sHeight,dX,dY,dWidth,dHeight);

        // document.body.appendChild(canvas);
        var canvasDataURL = onePageCanvas.toDataURL("image/png", 1.0);

        var width         = onePageCanvas.width;
        var height        = onePageCanvas.clientHeight;

        //! If we're on anything other than the first page,
        // add another page
        if (i > 0) {
            pdf.addPage(595, 842); //8.5" x 11" in pts (in*72)
        }
        //! now we declare that we're working on that page
        pdf.setPage(i+1);
        //! now we add content to that page!
        pdf.addImage(canvasDataURL, 'PNG', 0, 0, (width*.72), (height*.71));

    }
    //! after the for loop is finished running, we save the pdf.
    pdf.save('Test3.pdf');
  }
  });
  }

我希望这会有帮助
受另一个堆栈溢出response的启发

这个问题的答案与前面类似，但我觉得我想给予一个示例，省去不必要的代码：
您可以轻松地浏览所有页面，并在每个页面上放置“水印”文本或其他项目，如下所示：

let pdf = new jspdf();
// do something that creates multiple pages
for (let pageNumber = 1; pageNumber <= pdf.getNumberOfPages(); pageNumber++) {
  pdf.setPage(pageNumber)
  pdf.addImage('myImgOnEveryPage.png', 10,10,20,20);
  pdf.text('My text on every page, 12, 12);
}

（联合战略数据框架2.1.1版）

var ctx = canvas.getContext("2d");
                ctx.drawImage(image, 0, 1025, sectionWidth, 1250, 0, 0, 1800, 950);
                var image2 = new Image();
                image2 = Canvas2Image.convertToJPEG(canvas);
                image2Data = image2.src;
                doc.addImage(image2Data, 'JPEG', -105, 5, 440, 325);

基本上，你可以得到画布的上下文，然后使用drawImage函数创建一个新的Image，它是你原始画布的一部分。

drawImage(img, startX, startY, originalW, originalH, destX, dextY, destW, destH);

其中startX和Y是原始图像上剪辑的起始位置，原始W和H是剪辑的高度和宽度（在原始图片上），基本上是要剪辑的大小，destX和Y是PDF上放置新剪辑的位置，destH和W定义剪辑放置在画布上时的大小（一旦您剪辑了图像，它们会拉伸图像）
希望这个有用，
干杯

您可以通过在自己的代码中添加一些小的调整来轻松地做到这一点。

$("#btnVC_saveGLSummary").click(function () {
    html2canvas($("#tblSaveAsPdf1"), {
    onrendered: function (canvas) {
    var myImage = canvas.toDataURL("image/jpeg");            
    var d = new Date().toISOString().slice(0, 19).replace(/-/g, "");
    filename = 'report_' + d + '.pdf';
    var doc = new jsPDF();
    var totalPages = doc.internal.getNumberOfPages();
    for(let i = 1; i < totalPages; i++) {
        doc.setPage(i);
        doc.addImage(myImage, 'JPEG', 12, 10);
    }       
    doc.save(filename);
    }
  });
});

函数react将多个组件转换为PDF文件

const ids = ["id1", "id2", "id3"]; // list id component want to export


const handleExport = useCallback(async () => {
setIsLoading(true);

const pdf = jsPDF("p", "pt", "a4");
let allHeight = 0;

const canvasPromises = ids.map(async (id) => {
  // ! change to state id
  setIsLoading(true);

  const element = document.getElementById(id);
  const canvas = await html2canvas(element);
  const img = canvas.toDataURL("image/png");
  const imgProperties = pdf.getImageProperties(img);
  const pdfWidth = pdf.internal.pageSize.getWidth();
  const pdfHeight =
    (imgProperties.height * pdfWidth) / imgProperties.width;

  if (allHeight > 700) {  // heigth over a4 heigth add page for pdf
    allHeight = 5;
    pdf.addPage(1);
  }

  pdf.addImage(
    img,
    "PNG",
    0,
    allHeight,
    pdfWidth - 5,
    pdfHeight,
    id,
    "FAST",
  );

  allHeight += pdfHeight + 5;
});
const dataField = await Promise.all(canvasPromises).then(
  (res) => res,
);

pdf.save(`${title}-${new Date().toLocaleString()}.pdf`);
setIsLoading(false);
return dataField; 
}, [ids]);