W3cubDocs

/CSS

prefix

The prefix descriptor of the @counter-style rule specifies content that will be prepended to the marker representation. If not specified, the default value will be "" (an empty string).

Syntax

/* <symbol> values */
prefix: "»";
prefix: "Page ";
prefix: url(bullet.png);

Values

<symbol>

Specifies a <symbol> that is prepended to the marker representation. It may be a <string>, <image>, or <custom-ident>.

Formal definition

Related at-rule @counter-style
Initial value "" (the empty string)
Computed value as specified

Formal syntax

prefix = 
  <symbol>  

<symbol> = 
  <string>        |
  <image>         |
  <custom-ident>  

<image> = 
  <url>       |
  <gradient>  

<url> = 
  url( <string> <url-modifier>* )  |
  src( <string> <url-modifier>* )

Examples

Adding a prefix to a counter

HTML

<ul class="index">
  <li>The Boy Who Lived</li>
  <li>The Vanishing Glass</li>
  <li>The Letters from No One</li>
  <li>The Keeper of the Keys</li>
  <li>Diagon Alley</li>
</ul>

CSS

@counter-style chapters {
  system: numeric;
  symbols: "0" "1" "2" "3" "4" "5" "6" "7" "8" "9";
  prefix: "Chapter ";
}

.index {
  list-style: chapters;
  padding-left: 15ch;
}

Result

Specifications

Specification
CSS Counter Styles Level 3
# counter-style-prefix

Browser compatibility

Desktop Mobile
Chrome Edge Firefox Internet Explorer Opera Safari WebView Android Chrome Android Firefox for Android Opera Android Safari on IOS Samsung Internet
prefix 91 91 33 No 77 No 91 91 33 64 No 16.0

See also

© 2005–2023 MDN contributors.
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/CSS/@counter-style/prefix