如果你正在使用React和MUI这样的库，在React应用中使用纯CSS并不是一个好的做法。更好的方法是使用一个名为GlobalStyles的样式组件，我们可以从Material UI导入它。 代码是这样的，

import { GlobalStyles } from '@mui/material';
const printStyle = {
  ['@media print']: {
    ['@page']: {
      size: 'landscape',
      margin: '2px',
     },
   },
 };

您可能不需要在@media打印中使用@page，因为@page仅用于打印。文档

页边距将消除浏览器在打印时生成的url。

我们可以在App容器中使用GlobalStyles。像这样

const App: React.FC = () => (
  <>
     <GlobalStyles styles={printStyle} />
     <AppView />
  </>
 );

当我们调用windows.print()时，它将应用上述CSS。 如果你在使用MUI之外的其他库，应该有一些组件或插件可以用于全局应用CSS。

-webkit-transform: rotate(-90deg); -moz-transform:rotate(-90deg);
     filter:progid:DXImageTransform.Microsoft.BasicImage(rotation=3);

在Firefox 16.0.2中不能运行，但在Chrome中可以运行

我曾经尝试解决这个问题，但我所有的研究都将我引向了ActiveX控件/插件。浏览器(至少在3年前)没有允许更改任何打印设置(副本数量，纸张大小)的技巧。

我努力提醒用户，当浏览器打印对话框出现时，他们需要选择“横向”。我还创建了一个“打印预览”页面，这比IE6的要好得多!我们的应用程序在一些报告中有非常宽的数据表，打印预览会清楚地告诉用户什么时候表格会溢出纸张的右边缘(因为IE6也不能处理2张纸的打印)。

是的，人们至今仍在使用IE6。

如前所述，size属性是您所需要的。要在打印时设置页面的方向和大小，您可以使用以下命令:

/* ISO Paper Size */
@page {
  size: A4 landscape;
}

/* Size in mm */    
@page {
  size: 100mm 200mm landscape;
}

/* Size in inches */    
@page {
  size: 4in 6in landscape;
}

下面是@page文档的链接。

我用横向设置创建了一个空白的MS文档，然后在记事本中打开它。复制并粘贴以下内容到我的html页面

<style type="text/css" media="print">
   @page Section1
    {size:11 8.5in;
    margin:.5in 13.6pt 0in 13.6pt;
    mso-header-margin:.5in;
    mso-footer-margin:.5in;
    mso-paper-source:4;}
div.Section1
    {page:Section1;}
</style>



<div class="Section1"> put  text / images / other stuff  </div>

打印预览以横向大小显示页面。这似乎在IE和Chrome上工作得很好，没有在FF上测试。

引用自css - discussion Wiki

The @page rule has been cut down in scope from CSS2 to CSS2.1. The full CSS2 @page rule was reportedly implemented only in Opera (and buggily even then). My own testing shows that IE and Firefox don't support @page at all. According to the now-obsolescent CSS2 spec section 13.2.2 it is possible to override the user's setting of orientation and (for example) force printing in Landscape but the relevant "size" property has been dropped from CSS2.1, consistent with the fact that no current browser supports it. It has been reinstated in the CSS3 Paged Media module but note that this is only a Working Draft (as at July 2009). Conclusion: forget about @page for the present. If you feel your document needs to be printed in Landscape orientation, ask yourself if you can instead make your design more fluid. If you really can't (perhaps because the document contains data tables with many columns, for example), you will need to advise the user to set the orientation to Landscape and perhaps outline how to do it in the most common browsers. Of course, some browsers have a print fit-to-width (shrink-to-fit) feature (e.g. Opera, Firefox, IE7) but it's inadvisable to rely on users having this facility or having it switched on.