Web/CSS/@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

<ul class="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 3The definition of 'fallback' in that specification.	Candidate Recommendation	Initial definition

Browser compatibility

Update compatibility data on GitHub

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`fallback`	Chrome No support No	Edge No support No	Firefox Full support 33	IE No support No	Opera No support No	Safari No support No	WebView Android No support No	Chrome Android No support No	Firefox Android Full support 33	Opera Android No support No	Safari iOS No support No	Samsung Internet Android No support No

Legend

Full support: Full support
No support: No support