I'm looking to convert some simple HTML into a PDF. It seems the easiest way to do this and keep the css styling is to use the 'html2canvas' js library to convert the html to canvas first, and then create the PDF using jsPDF.
The issue I'm getting is that I have both a background image and inline image in my HTML but neither are showing in the PDF once converted. I've created a Codepen here: https://codepen.io/adamboother/pen/NWGeqom
Here's my js that does the conversion:
function convertToPdf()
{
html2canvas(document.querySelector('#certificate')).then(canvas => {
let pdf = new jsPDF('landscape', 'mm', 'a4');
pdf.addImage(canvas.toDataURL('image/png'), 'PNG', 0, 0, pdf.internal.pageSize.width, pdf.internal.pageSize.height);
pdf.save('certificate.pdf');
});
}
Has anyone found a fix for this?
I am using useCORS: true to your code and it works, assuming your image is in the server. Besides you can follow below code:
function convertToPdf()
{
html2canvas(document.querySelector('#certificate'), {useCORS: true}).then(function(canvas) {
let img = new Image();
img.src = canvas.toDataURL('image/png');
img.onload = function () {
let pdf = new jsPDF('landscape', 'mm', 'a4');
pdf.addImage(img, 0, 0, pdf.internal.pageSize.width, pdf.internal.pageSize.height);
pdf.save('certificate.pdf');
};
});
}
Related
This is my first post because I am stuck and I didn't find the solution neither here or the web.
I want to convert HTML to PDF using JS. I was searching and the best option seems to be HTML2canvas and JSpdf. But the think is my HTML is storage in a variable:
var test = '<html><head><script type="text/javscript">var number = 123;</script></head><body>
<h1>"the value for number is: " + number</h1></body></html>'
My variable is much more complex and it contains CSS and styles but this is just to get the idea. Then when I try to convert this into canvas it doesn't convert.
const filename = 'ThisIsYourPDFFilename.pdf';
html2canvas(test).then(canvas => {
let pdf = new jsPDF('p', 'mm', 'a4');
pdf.addImage(canvas.toDataURL('image/png'), 'PNG', 0, 0, 211, 298);
pdf.save(filename);
});
Does anyone know why this happens? Maybe it is a really stupid question but I don't know how to avoid the errors.
Thank you in advance.
You use string as a parameter for html2canvas, but it takes HTML element:
html2canvas(document.body).then(function(canvas) {
document.body.appendChild(canvas);
});
Look at their documentation
I have modified your code:
const html2canvas = require("html2canvas");
const jsPDF = require("jspdf");
html2canvas(document.getElementById("screenshot"), { scale: 1 }).then(
(canvas) => {
document.body.appendChild(canvas);
const filename = "ThisIsYourPDFFilename.pdf";
let pdf = new jsPDF("p", "mm", "a4");
pdf.addImage(canvas.toDataURL("image/png"), "PNG", 0, 0);
pdf.save(filename);
document.body.removeChild(canvas);
}
);
body should contain element with id screenshot:
<div id="screenshot">
Content
</div>
UPDATE:
According to this resource jsPDF has method fromHTML, so you might not need html2canvas
var doc = new jsPDF();
var elementHTML = $('#contnet').html();
var specialElementHandlers = {
'#elementH': function (element, renderer) {
return true;
}
};
// note here that it uses html
doc.fromHTML(elementHTML, 15, 15, {
'width': 170,
'elementHandlers': specialElementHandlers
});
// Save the PDF
doc.save('sample-document.pdf');
I am trying to save my html page as a PDF domtoimage.toPng(document.getElementById('PrintForm'))
.then(function (blob) {
var pdf = new jsPDF('p', 'pt', [$('#PrintForm').width(), $('#PrintForm').height()]);
pdf.addImage(blob, 'PNG', 0, 0, $('#PrintForm').width(), $('#PrintForm').height());
pdf.save("test.pdf");
that.options.api.optionsChanged();
});</pre>
In this I can't able to get my select tag value am while am saving as pdf i will get the Default in the select tag.Like below
Try this...
var obj = $(".yourclassname")[0]
var srcwidth = obj.scrollWidth;
var pdf = new jsPDF('p', 'pt', 'a4');
pdf.html(obj, {
html2canvas: {
scale: 600 / srcwidth
//600 is the width of a4 page. 'a4': [595.28, 841.89]
},
callback: function () {
window.open(pdf.output('bloburl'));
}
});
Where yourclassname is your object in the page (or #yourobjectid). srcwidth is the width calculation so your html fits the width of the page. You might need to add some padding to the html to fit inside the pdf (I added 20px to my div). You should be using this version 1.5.3 of jsPdf for the above to work. Hope this helps (works perferctly for me). You should also be using the latest version of html2canvas 1.0.0-rc.5
I have a django app where users would print some pages which include images as a part of Data processing.
I tried jsPDF but it didn't render my images and I ended up with just text
$(document).ready(function() {
$("#pdfDownloader").click(function() {
var doc = new jsPDF('p', 'pt', 'a4', true);
doc.fromHTML($('#renderMe').get(0), 15, 15, {
'width': 500
}, function (dispose) {
doc.save('thisMotion.pdf');
});
});
})
This was my code and it didn't render the images so do I need to change anything?
is using a Django view would solve this and is there any alternatives to xhtml2pdf as with this I need to include my CSS in the HTML file ?
fromHTML is used to get text from the HTML to form a PDF. Try using html2canvas js library instead.
<script src="https://cdnjs.cloudflare.com/ajax/libs/html2canvas/0.5.0-beta4/html2canvas.min.js"></script>
You can create a canvas image and add it to the PDF with code like this,
$(document).ready(function() {
$("#pdfDownloader").click(function() {
html2canvas($("#renderMe")).then(canvas => {
const contentDataURL = canvas.toDataURL('image/png')
let pdf = new jspdf('p', 'pt', 'a4', true); // A4 size page of PDF
var positionX = 0;
var positionY = 0;
pdf.addImage(contentDataURL, 'PNG', positionY, positionY, undefined, undefined)
pdf.save('thisMotion.pdf'); // Generated PDF
});
});
})
This will get you a PDF just like the HTML rendered on screen.
Using html2canvas to try to create pdfs and/or pngs and its working, except it only renders the visible section of the screen.
Anyone have any idea how to fix this?
//create pdf
$(document).ready(function() {
$('#downloadpdf').click(function() {
html2canvas($("#fullreporttoprint"), {
onrendered: function(canvas) {
var imgData = canvas.toDataURL(
'image/png');
var doc = new jsPDF('p', 'mm');
doc.addImage(imgData, 'PNG', 10, 10);
doc.save('mywindassessment.pdf');
}
});
});
});
Before someone marks this, I've checked everywhere online and SO for this problem, and was unable to find a working solution.
I am concerned for a few days... How save PDF for HTMLCode.
I find jsPDF!!
but I do not want to it because I was unable to use the CSS I want...T.T
so I think HTMLCode convert canvasImage(html2canvas and rasterizeHTML useing)
after canvasImage convert PDF!!
WOW starting is fantastic!! After a few moments later come trial it is CORS
HTML5 Canvas not suppot CORS image.
I want to use canvas render CORS image
help me please!!
example
html2canvas($("body")[0], {
onrendered: function(canvas) {
var img = canvas.toDataURL("image/png");
var pdf = new jsPDF();
//window.open(img);
pdf.addImage(img, 'png', 10, 10, 180, 160);
pdf.save('test.pdf');
}
});