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
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>
其他回答
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');
}
});
}
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 = $("#dvContainer").html();
var printWindow = window.open('', '', 'height=400,width=800');
printWindow.document.write('<html><head><title>DIV Contents</title>');
printWindow.document.write('</head><body >');
printWindow.document.write(divContents);
printWindow.document.write('</body></html>');
printWindow.document.close();
printWindow.print();
});
</script>
</head>
<body>
<form id="form1">
<div id="dvContainer">
This content needs to be printed.
</div>
<input type="button" value="Print Div Contents" id="btnPrint" />
</form>
</body>
</html>
不满意html2canvas的渲染和缺乏现代CSS3/JS和打印特定的CSS支持pdfMake的过时版本的WebKit…
这是一个理论上的解决方案，它是无头的，可以忠实地渲染页面，支持分页符，页边距，不同的页面大小，并且可以自动化。你甚至可以把WebGl渲染成PDF。
Chrome有一个devtools协议…它有printtoPDF函数 摘录:https://gitlab.com/-/snippets/new 官方20k-SLOC规范:https://github.com/ChromeDevTools/devtools-protocol/blob/master/json/browser_protocol.json 你可以使用节点和https://github.com/GoogleChrome/chrome-launcher运行chrome无头…等待它渲染。 利润
在chrome_devtools协议上执行printToPDF命令:
printToPDF({
printBackground: false,
pageWidth: 8.5,
pageHeight: 11,
transferMode: "ReturnAsStream" // or ReturnAsBase64
})
没有依赖，纯JS 要添加CSS或图像-不要使用相对url，使用完整的url http://...domain.../path.css左右。它创建单独的HTML文档，没有主要内容的上下文。 您还可以将图像嵌入为base64
多年来，这句话一直为我服务:
export default function printDiv({divId, title}) {
let mywindow = window.open('', 'PRINT', 'height=650,width=900,top=100,left=150');
mywindow.document.write(`<html><head><title>${title}</title>`);
mywindow.document.write('</head><body >');
mywindow.document.write(document.getElementById(divId).innerHTML);
mywindow.document.write('</body></html>');
mywindow.document.close(); // necessary for IE >= 10
mywindow.focus(); // necessary for IE >= 10*/
mywindow.print();
mywindow.close();
return true;
}
Of course this will open print dialog and user will have to know she/he can select print to pdf option, to get pdf. There may be printer pre-selected and if user confirms may get this document actually printed. To avoid such situation and to provide PDF without any extras, you need to make PDF file. Probably on the server side. You could have tiny html page with invoice only and convert it to PDF file with headless chrome. It's super easy with puppeteer. No need to install/config chrome, just install npm package puppeteer (managed by chrome team) and run it. Keep in mind this will actually launch real chrome just w/o GUI, so you need to have some RAM & CPU for this. Most servers will be fine with low enough traffic. Here is code sample but this must run on the BACKEND. Nodejs. Also it's slow call, it's resources intensive call. You should run it NOT on api call but e.g. after invoice was created - create pdf for it and store, if pdf was not generated yet, just show message to try again in couple minutes.
const puppeteer = require('puppeteer');
(async () => {
const browser = await puppeteer.launch();
const page = await browser.newPage();
await page.goto('https://your-domain.com/path-to-invoice', {
waitUntil: 'networkidle2',
});
await page.pdf({ path: 'invoice-file-path.pdf', format: 'a4' });
await browser.close();
})();
更多信息请访问:https://pptr.dev/
你可以使用autoPrint()并将输出设置为'dataurlnewwindow'，如下所示:
function printPDF() {
var printDoc = new jsPDF();
printDoc.fromHTML($('#pdf').get(0), 10, 10, {'width': 180});
printDoc.autoPrint();
printDoc.output("dataurlnewwindow"); // this opens a new popup, after this the PDF opens the print window view but there are browser inconsistencies with how this is handled
}
