我正在尝试从具有某些内容的html元素(div)生成PDF:
<div id = "toPDF">
<table >
<thead>
<tr>
<th>Destination</th>
<th>Start Date</th>
<th>End Date</th>
<th>Comment</th>
</tr>
</thead>
<tbody>
<tr>
<td>Dest1</td>
<td>Date1</td>
<td>Date2</td>
<td>Comment1</td>
</tr>
</tbody>
</table>
</div>
.
.
.
<script src="https://cdnjs.cloudflare.com/ajax/libs/html2canvas/0.4.1/html2canvas.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jspdf/1.5.3/jspdf.debug.js" integrity="sha384-NaWTHo/8YCBYJ59830LTz/P4aQZK1sS0SneOgAvhsIl3zBu8r9RevNg5lHCHAuQ/" crossorigin="anonymous"></script>
<script src="app.js"></script>
我正在使用以下javascript:
window.html2canvas = html2canvas;
var elem = document.getElementById('toPDF');
pdf.html(elem,
{
x: 20,
y: 140,
callback:
function (pdf) {
pdf.text(80, 230, "Test Text");
var iframe = document.createElement('iframe');
iframe.setAttribute('style', 'position:absolute;top:0;right:0;height:100%; width:600px');
document.body.appendChild(iframe);
iframe.src = pdf.output('datauristring');
}
});
生成的PDF显示“测试文本”,但没有html表的痕迹。如果删除“测试文本”,则输出PDF为空。浏览器控制台显示以下错误:
TypeError: Argument 1 of CanvasRenderingContext2D.drawImage could not be converted to any of: HTMLImageElement, SVGImageElement, HTMLCanvasElement, HTMLVideoElement, ImageBitmap
我尝试了不同的选择。我要一个工作的jsPDF.html()示例。
答案 0 :(得分:1)
问题很可能是您使用的html2canvas
的版本。 html2canvas 0.4.1
无法正常工作。它应该是html2canvas 1.0.0-alpha.11
或更高。但是,当前版本html2canvas 1.0.0-rc.3
也不起作用,它也给了我空白页。至少html2canvas 1.0.0-alpha.12
仍然对我有用。
<script src="https://cdnjs.cloudflare.com/ajax/libs/jspdf/1.5.3/jspdf.debug.js"
integrity="sha384-NaWTHo/8YCBYJ59830LTz/P4aQZK1sS0SneOgAvhsIl3zBu8r9RevNg5lHCHAuQ/"
crossorigin="anonymous"></script>
<script src="~/lib/html2canvas/html2canvas.min.js"></script>
<!-- html2canvas 1.0.0-alpha.11 or html2canvas 1.0.0-alpha.12 is needed -->
<script>
function download() {
let pdf = new jsPDF('p', 'pt', 'a4');
pdf.html(document.getElementById('toPDF'), {
callback: function () {
window.open(pdf.output('bloburl'));
}
});
}
</script>
更新:适用于我的最新版本是
html2canvas v1.0.0-rc.1