@page

The @page at-rule can contain only page descriptors and margin at-rules. The following descriptors have been implemented by at least one browser:

margin

Specifies the page margins. Individual margin properties margin-top, margin-right, margin-bottom, and margin-left can also be used.

page-orientation

Specifies the orientation of the page. This does not affect the layout of the page; the rotation is applied after the layout in the output medium.

size

Specifies the target size and orientation of the page box's containing block. In the general case, where one page box is rendered onto one page sheet, it also indicates the size of the destination page sheet.

The specification mentions following CSS properties to be applicable to page boxes via @page at-rule. But these have not been supported by any user agent yet.

The @page rule defines properties of the page box. The @page at-rule can be accessed via the CSS object model interface CSSPageRule.

The @page at-rule, allows the user to assign a name to the rule, which is then called in a declaration using the page property.

page

Allows a selector to use a user defined named page

@page = 
  @page <page-selector-list>? { <declaration-rule-list> }  

<page-selector-list> = 
  <page-selector>#  

<page-selector> = 
  [ <ident-token>? <pseudo-page>* ]!  

<pseudo-page> = 
  ':' [ left | right | first | blank ]  

Where the <page-body> includes:

• page-properties
• page-margin properties

and <pseudo-page> represents these pseudo-classes:

• :blank
• :first
• :left
• :right

The margin at-rules are used inside of the @page at-rule. They each target a different section of the document printed page, styling the area of the printed page based on the property values set in the style block:

@page {
  @top-left {
    /* page-margin-properties */
  }
}

@top-left targets the top-left of the document and applies the changes based on the page-margin-properties set.

Other margin-at rules include:

@top-left-corner
@top-left
@top-center
@top-right
@top-right-corner
@bottom-left-corner
@bottom-left
@bottom-center
@bottom-right
@bottom-right-corner
@left-top
@left-middle
@left-bottom
@right-top
@right-middle
@right-bottom

The page-margin properties are the set of CSS properties can be set in any individual margin at-rule. They include:

Named pages enable performing per-page layout and adding page-breaks in a declarative manner when printing.

Named pages can be applied using the page property. This allows the user to create different page configurations for use in print layouts.

An example of this can be found on the page examples.

This example shows how to split the <section>s into individual pages in landscape format with each page having a 20% margin when printed.

HTML

<button>Print Webpage</button>
<article>
  <section>
    <h2>Header</h2>
    <p>
      Lorem ipsum dolor, sit amet consectetur adipisicing elit. Consequatur
      facilis vitae voluptatibus odio consequuntur optio placeat? Id, nam sequi
      aut in dolorem dolores, laudantium, quasi totam ipsam aliquam quibusdam
      velit.
    </p>
  </section>
  <section>
    <h2>Header</h2>
    <p>
      Lorem ipsum dolor, sit amet consectetur adipisicing elit. Consequatur
      facilis vitae voluptatibus odio consequuntur optio placeat? Id, nam sequi
      aut in dolorem dolores, laudantium, quasi totam ipsam aliquam quibusdam
      velit.
    </p>
  </section>
  <section>
    <h2>Header</h2>
    <p>
      Lorem ipsum dolor, sit amet consectetur adipisicing elit. Consequatur
      facilis vitae voluptatibus odio consequuntur optio placeat? Id, nam sequi
      aut in dolorem dolores, laudantium, quasi totam ipsam aliquam quibusdam
      velit.
    </p>
  </section>
</article>

CSS

@page {
  size: landscape;
  margin: 20%;
}

section {
  page-break-after: always;
  break-after: page;
}

@media print {
  button {
    display: none;
  }
}

body {
  font-family: "Helvetica", sans-serif;
  background-color: silver;
}

article {
  width: 100%;
}

section {
  display: grid;
  background-color: white;
  border-radius: 0.6rem;
  justify-items: center;
  padding: 1rem;
  width: 50%;
  print-color-adjust: exact;
  -webkit-print-color-adjust: exact;
  margin: 0 auto;
  margin-block-end: 1.5rem;
  border: 1px dashed;
}

JavaScript

const button = document.querySelector("button");

button.addEventListener("click", () => {
  window.print();
});

Result

Clicking the print button will launch a print dialog with the html sections split into individual pages.

Please refer to the various pseudo-classes of @page for examples.

• :blank
• :first
• :left
• :right

• The @page size descriptor
• The page property
• See the [META] CSS Paged Media Module Level 3 ticket in Bugzilla for tracking progress on the subject (page-based counters, etc.)
• CSS paged media module
• Paged.js: W3C paged media polyfill