将html中的内容生成PDF并且下载


<head>
    @*需要引用的js库*@

    <script src="https://cdnjs.cloudflare.com/ajax/libs/html2canvas/0.4.1/html2canvas.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/jspdf/1.0.272/jspdf.debug.js"></script>

</head>
<body>
    <div id="pdfDom" class="right-aside">
        1232132131sd
    </div>
    <input type="button" value="点击" onclick="makeMpdf(\'建设工程施工安全监督抽查记录\', \'pdfDom\')" />
    <script type="text/javascript">//将html页面导出.pdf格式文件(适用于jQuery、vue库)  -- xzz 2018/04/24
        function makeMpdf(pdfName,elementId) {
            if (confirm("您确认下载该PDF文件吗?")) {
                //var target = document.getElementsByClassName("right-aside")[0];
                var target = document.getElementById(elementId);
                target.style.background = "#FFFFFF";
                if (pdfName == \'\' || pdfName == undefined) pdfName = "content";

                html2canvas(target, {
                    onrendered: function (canvas) {
                        var contentWidth = canvas.width;
                        var contentHeight = canvas.height;

                        //一页pdf显示html页面生成的canvas高度;
                        var pageHeight = contentWidth / 592.28 * 841.89;
                        //未生成pdf的html页面高度
                        var leftHeight = contentHeight;
                        //页面偏移
                        var position = 0;
                        //a4纸的尺寸[595.28,841.89]，html页面生成的canvas在pdf中图片的宽高
                        var imgWidth = 595.28;
                        var imgHeight = 592.28 / contentWidth * contentHeight;

                        var pageData = canvas.toDataURL(\'image/jpeg\', 1.0);

                        var pdf = new jsPDF(\'\', \'pt\', \'a4\');

                        //有两个高度需要区分，一个是html页面的实际高度，和生成pdf的页面高度(841.89)
                        //当内容未超过pdf一页显示的范围，无需分页
                        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;
                                //避免添加空白页
                                if (leftHeight > 0) {
                                    pdf.addPage();
                                }
                            }
                        }
                        pdf.save(pdfName + ".pdf");
                    }
                })
            }
        }

    </script>
</body>