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@counter-style.fallback

The fallback descriptor can be used to specify a counter style to fall back to if the current counter style cannot create a marker representation for a particular counter value.

Syntax

/* Keyword values */
fallback: lower-alpha;
fallback: custom-gangnam-style;

Description

If the specified fallback style is also unable to construct a representation, then its fallback style will be used. If a valid fallback style is not specified, it defaults to decimal.

A couple of scenarios where a fallback style will be used are:

  • When the range descriptor is specified for a counter style, the fallback style will be used to represent values that fall outside the range.
  • When the fixed system is used and there are not enough symbols to cover all the list items, the fallback style will be used for the rest of the list items.

Formal definition

Related at-rule @counter-style
Initial value decimal
Computed value as specified

Formal syntax

<counter-style-name>

where
<counter-style-name> = <custom-ident>

Examples

Specifying a fallback counter style

HTML

<ulclass="list"><li>One</li><li>Two</li><li>Three</li><li>Four</li><li>Five</li></ul>

CSS

@counter-style fallback-example {
  system: fixed; symbols: "\24B6" "\24B7" "\24B8";
  fallback: upper-alpha;
}

.list {
  list-style: fallback-example;
}

Result

Specifications

Specification Status Comment
CSS Counter Styles Level 3
The definition of 'fallback' in that specification.
Candidate Recommendation Initial definition

Browser compatibilityUpdate compatibility data on GitHub

Desktop
Chrome Edge Firefox Internet Explorer Opera Safari
fallback No No 33 No No No
Mobile
Android webview Chrome for Android Firefox for Android Opera for Android Safari on iOS Samsung Internet
fallback No No 33 No No No

See also

© 2005–2020 Mozilla and individual contributors.
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/CSS/@counter-style/fallback