我从1998年开始在商业报告中使用680px打印A4页。700px不能正确地拟合取决于边缘的大小。现代浏览器可以缩小页面以适应打印机上的页面，但如果您使用680像素，几乎在任何浏览器中都可以正确打印。

运行代码片段并查看结果:

window.print (); <table width=680 border=1 cellpadding=20 cellspacing=0> < tr > < th > # < / th > < th >名称< / th > < / tr > < tr对齐=中心> < td > 1 < / td > < td >唐纳德·特朗普< / td > < / tr > 2 < tr对齐=中心> < td > < / td > < td >巴拉克•奥巴马(BARACK OBAMA) < / td > < / tr > 表> < /

JSFiddle:

https://jsfiddle.net/ajofmm7r/

有很多方法:

使用毫米:

html, body {
    width:  210mm;
    height: 297mm;
}

使用公分cm:

html, body {
    width:  21.0cm;
    height: 29.7cm;
}

使用点pt:

html, body {
    width:  595pt;
    height: 842pt;
}

完全可以将布局设置为a4页面的比例。你只需要设置相应的宽度和高度(可能检查窗口。innerHeight和window。虽然我不确定这是否可靠)。

The tricky part is with printing A4. Javascript for example only supports printing pages rudimentarily with the window.print method. As @Prutswonder suggested creating a PDF from the webpage probably is the most sophisticated way of doing this (other than supplying PDF documentation in the first place). However, this is not as trivial as one might think. Here's a link that has a description of an all open source Java class to create PDFs from HTML: http://www.javaworld.com/javaworld/jw-04-2006/jw-0410-html.html .

显然，一旦你创建了一个A4比例的PDF打印，它将导致一个干净的A4打印页面。这是否值得投入时间是另一个问题。

<link rel="stylesheet" href="/css/style.css" type="text/css">
<link rel="stylesheet" href="/css/print.css" type="text/css" media="print">

在你的normal style.css中:

table.tableclassname {
  width: 400px;
}

在你的print.css中:

table.tableclassname {
  width: 16 cm;
}

I know that this subject is quite old but I want to share my experience about that topic. Actually, I was searching a module that can help me with my daily reports. I'm writting some documentations and some reports in HTML + CSS (instead of Word, Latex, OO, ...). The objectif would be to print them on A4 paper to share it with friends, ... Instead of searching, I decided to have a small funny coding session to implement a simple lib that can handle "pages", page number, summary, header, footer, .... Finally, I did it in ~~2h and I know that's not the best tool ever but it's almost ok for my purpose. You can take a look at this project on my repo and don't hesitate to share your ideas. It's maybe not what you are searching for at 100% but I think that this module can help you.

基本上我创建了一个页面的主体“宽度:200mm;”和容器的高度:290mm(小于A4)。然后我使用了page-break-after: always;因此，浏览器的“打印”选项知道何时拆分页面。

回购:https://github.com/kursion/jsprint

我使用HTML生成报告，在真实的纸张上正确地打印出真实大小。

如果你小心地使用mm作为CSS文件中的单位，你应该是OK的，至少对于单页。不过，人们可以通过改变浏览器中的打印缩放来搞砸你。

我似乎记得我所做的每一件事都是单页的，所以我不必担心分页——那可能要困难得多。