我有以下html代码:
<!DOCTYPE html>
<html>
<body>
<p>don't print this to pdf</p>
<div id="pdf">
<p><font size="3" color="red">print this to pdf</font></p>
</div>
</body>
</html>
所有我想做的是打印到pdf，无论在div中找到一个id为“pdf”。这必须使用JavaScript来完成。"pdf"文件会自动下载，文件名为"foobar.pdf"
我一直在使用jspdf来做到这一点，但它唯一的功能是“文本”，只接受字符串值。我想提交HTML到jspdf，而不是文本。
当前回答
如果你需要下载一个特定页面的PDF文件，只需添加这样的按钮
<h4 onclick="window.print();"> Print </h4>
使用window.print()打印整个页面，而不仅仅是一个div
其他回答
这是一个简单的解决方案。这对我很有用。你可以使用javascript打印概念，并简单地将其保存为pdf。
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title></title>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js"></script>
<script type="text/javascript">
$("#btnPrint").live("click", function () {
var divContents = $("#dvContainer").html();
var printWindow = window.open('', '', 'height=400,width=800');
printWindow.document.write('<html><head><title>DIV Contents</title>');
printWindow.document.write('</head><body >');
printWindow.document.write(divContents);
printWindow.document.write('</body></html>');
printWindow.document.close();
printWindow.print();
});
</script>
</head>
<body>
<form id="form1">
<div id="dvContainer">
This content needs to be printed.
</div>
<input type="button" value="Print Div Contents" id="btnPrint" />
</form>
</body>
</html>
如前所述，您应该使用jsPDF和html2canvas。我还在jsPDF问题中发现了一个函数，它自动将您的pdf分割成多个页面(来源)
function makePDF() {
var quotes = document.getElementById('container-fluid');
html2canvas(quotes, {
onrendered: function(canvas) {
//! MAKE YOUR PDF
var pdf = new jsPDF('p', 'pt', 'letter');
for (var i = 0; i <= quotes.clientHeight/980; i++) {
//! This is all just html2canvas stuff
var srcImg = canvas;
var sX = 0;
var sY = 980*i; // start 980 pixels down for every new page
var sWidth = 900;
var sHeight = 980;
var dX = 0;
var dY = 0;
var dWidth = 900;
var dHeight = 980;
window.onePageCanvas = document.createElement("canvas");
onePageCanvas.setAttribute('width', 900);
onePageCanvas.setAttribute('height', 980);
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(612, 791); //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', 20, 40, (width*.62), (height*.62));
}
//! after the for loop is finished running, we save the pdf.
pdf.save('test.pdf');
}
});
}
使用pdfMake.js和这个Gist。
(我在这里找到了Gist和html-to-pdfmake包的链接，但我现在没有使用这个包。)
在npm安装pdfmake后，将Gist保存在htmlToPdf.js中，我这样使用它:
const pdfMakeX = require('pdfmake/build/pdfmake.js');
const pdfFontsX = require('pdfmake-unicode/dist/pdfmake-unicode.js');
pdfMakeX.vfs = pdfFontsX.pdfMake.vfs;
import * as pdfMake from 'pdfmake/build/pdfmake';
import htmlToPdf from './htmlToPdf.js';
var docDef = htmlToPdf(`<b>Sample</b>`);
pdfMake.createPdf({content:docDef}).download('sample.pdf');
备注:
My use case is to create the relevant html from a markdown document (with markdown-it) and subsequently generating the pdf, and uploading its binary content (which I can get with pdfMake's getBuffer() function), all from the browser. The generated pdf turns out to be nicer for this kind of html than with other solutions I have tried. I am dissatisfied with the results I got from jsPDF.fromHTML() suggested in the accepted answer, as that solution gets easily confused by special characters in my HTML that apparently are interpreted as a sort of markup and totally mess up the resulting PDF. Using canvas based solutions (like the deprecated jsPDF.from_html() function, not to be confused with the one from the accepted answer) is not an option for me since I want the text in the generated PDF to be pasteable, whereas canvas based solutions generate bitmap based PDFs. Direct markdown to pdf converters like md-to-pdf are server side only and would not work for me. Using the printing functionality of the browser would not work for me as I do not want to display the generated PDF but upload its binary content.
我使用JSPDF和html2canvas进行CSS渲染，我导出特定div的内容，因为这是我的代码
$(document).ready(function () {
let btn=$('#c-oreder-preview');
btn.text('download');
btn.on('click',()=> {
$('#c-invoice').modal('show');
setTimeout(function () {
html2canvas(document.querySelector("#c-print")).then(canvas => {
//$("#previewBeforeDownload").html(canvas);
var imgData = canvas.toDataURL("image/jpeg",1);
var pdf = new jsPDF("p", "mm", "a4");
var pageWidth = pdf.internal.pageSize.getWidth();
var pageHeight = pdf.internal.pageSize.getHeight();
var imageWidth = canvas.width;
var imageHeight = canvas.height;
var ratio = imageWidth/imageHeight >= pageWidth/pageHeight ? pageWidth/imageWidth : pageHeight/imageHeight;
//pdf = new jsPDF(this.state.orientation, undefined, format);
pdf.addImage(imgData, 'JPEG', 0, 0, imageWidth * ratio, imageHeight * ratio);
pdf.save("invoice.pdf");
//$("#previewBeforeDownload").hide();
$('#c-invoice').modal('hide');
});
},500);
});
});
下面的方法对我的案例很有效。
隐藏页面的其他部分，如下例所示
@media print{
body{
-webkit-print-color-adjust: exact; // if you want to enable graphics
color-adjust: exact !important; // if you want to enable graphics
print-color-adjust: exact !important; // if you want to enable graphics
* {
visibility: hidden;
margin:0;
padding:0
}
.print_area, .print_area *{
visibility: visible;
}
.print_area{
margin: 0;
align: center;
}
.pageBreak {
page-break-before : always; // If you want to skip next page
page-break-inside: avoid; // If you want to skip next page
}
}
@page {
size: A4; margin:0mm; // set page layout
background-color: #fff;
}
}
使用javascript的print函数来打印执行。
<button onclick="window.print()">Print</button>
