@page - CSS: Cascading Style Sheets 编辑

The @page CSS at-rule is used to modify some CSS properties when printing a document.

Syntax

@page {
  margin: 1cm;
}

@page :first {
  margin: 2cm;
}

Descriptors

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.

marks

Adds crop and/or registration marks to the document.

bleed

Specifies the extent beyond the page box at which the page rendering is clipped.

Description

You can't change all CSS properties with @page. You can only change the margins, orphans, widows, and page breaks of the document. Attempts to change any other CSS properties will be ignored.

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

Note: The W3C is discussing how to handle viewport-related <length> units, vh, vw, vmin, and vmax. Meanwhile do not use them within a @page at-rule.

Formal syntax

@page <page-selector-list> {
  <page-body>
}
where 
<page-selector-list> = [ <page-selector># ]?
<page-body> = <declaration>? [ ; <page-body> ]? | <page-margin-box> <page-body>
where 
<page-selector> = <pseudo-page>+ | <ident> <pseudo-page>*
<page-margin-box> = <page-margin-box-type> '{' <declaration-list> '}'
where 
<pseudo-page> = : [ left | right | first | blank ]
<page-margin-box-type> = @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

Examples

@page pseudo-class examples

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

• :blank
• :first
• :left
• :right
• :recto
• :verso

Specifications

Specification	Status	Comment
CSS Logical Properties and Values Level 1 The definition of ':recto and :verso' in that specification.	Editor's Draft	Adds the :recto and :verso page selectors
CSS Paged Media Module Level 3 The definition of '@page' in that specification.	Working Draft	No change from CSS Level 2 (Revision 1), though more CSS at-rules can be used inside a @page.
CSS Level 2 (Revision 1) The definition of '@page' in that specification.	Recommendation	Initial definition

Browser compatibility

BCD tables only load in the browser

See also

• See the [META] CSS Paged Media Module Level 3 ticket in Bugzilla for tracking progress on the subject (page-based counters, etc.)