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

css

/* <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

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

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	17	91	91	33	64	17	16.0

Docs

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