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I have trouble understanding how to render html elements with correct size when printing them to A4 size paper.
To illustrate my purpose, I simplified my code to a html page with a single red bordered table that should be 210mmx297mm (A4 paper size):
<!DOCTYPE html>
<html>
<head>
<style>
@page
{
size: 210mm 297mm portrait; /* Set paper size to A4 (portrait) */
}
html, body
{
width: 210mm;
padding:0;
margin: 0 auto; /* Left, right are auto for body to appear as centered on screen */
}
html
{
background: rgb(204,204,204); /* gray client window for screen (so as to emphase the body as looking as A4 paper) */
}
table
{
width:100%;
height:297mm;
-moz-box-sizing: border-box;
border: solid 3px red;
border-spacing:0;
border-collapse: collapse;
}
td
{
padding: 0;
text-align: center;
box-shadow: inset 0 0 0 1000px white;
}
</style>
</head>
<body>
<table><tr><td>Hello world!</td></tr></table>
</body>
</html>
I tried to force size to 210mmx297mm all the way round in the css, but there's still something wrong. I can't figure out what it is ... either a bug in rendering engine or setting missing in my code.
Note
Contextually I'm trying to create automatic reports all in html+css+javascript so they can be easily be viewed and eventually printed to pdf or paper from a web-browser. Cover page should be filled with some image up the very edges of A4 paper.
Here is some more complete example:
Example (JSFiddle)
I'm almost there, everything display nicely on screen (firefox+chrome) but there's still those margins when printing (printing works with firefox+nomargin+adaptsize only ... chrome is bugged for repeating table header/footer when printing).
915
One of the simplest ways to resize an image in the HTML is using the height and width attributes on the img tag. These values specify the height and width of the image element. The values are set in px i.e. CSS pixels.
However, with no width value provided for the HTML element, setting the width of the body element to 100% results in full page width. This can be counterintuitive and confusing. For a responsive full page height, set the body element min-height to 100vh.
Create a Separate Version for PrintingCreate a separate HTML page for printing. Duplicate the primary content of the full page, whittling it down to primarily text. Remove unnecessary headers and footers (these are often composed of links which would be meaningless on paper). Remove ads and menus from side columns.
You are tackling a difficult problem which is a bane of many programmers' existence. Printing from HTML and ensuring compatibility with different browsers is basically a unicorn. You shouldn't manage that concern yourself. The quirks of CSS styling and the fragmentation of the browser ecosystem will make sure you don't succeed.
My advice is that you take a look at a PDF generator API like PDF Kit or iText.
From my research, page and form printing is especially problematic on Firefox. As you've noticed from first hand experience, you can't manage margins in a sane way. I also tried with Firefox 49.0.2 without success.
I thought about using @media print{} but Firefox was unwilling to collaborate.
That being said, your code worked just fine for me running Chrome on the version you mentioned. Note that I set the margins to 'none'.
151
Cover page should be filled with some image up the very edges of A4 paper.
You're never going to satisfy this requirement. Trust me, I've been doing dashboards and reports on the web for a long time and you simply don't get fine-grained control over rendering like this. The web isn't designed for it.
You can still generate some great reports if you're willing to work within a margin and not try for pixel-perfect layouts. Web reports can look super sharp and you can cover multiple media with one code base.
But for situations where pixel-perfect rendering matters, in addition to control over page breaks and such, only a PDF library will suffice. There are some good ones out there--I've had success with PDFSharp.
Why don't you display a cover image that doesn't span the entire page?
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