coderef

counter-setBaseline · Widely available

The counter-set CSS property creates (and optionally sets a value for) a counter, the numbers for a series of headings or ordered list items.

Supported in all major browsers for at least 30 months — safe to use without fallbacks. Baseline since Dec 11, 2023. Widely available since Jun 11, 2026.

How to use ↓Compare browsers

Browser support

DesktopChrome
1–84Not supported
85+Supportedsince Aug 25, 2020
Current: 155
Edge
12–84Not supported
85+Supportedsince Aug 27, 2020
Current: 154
Firefox
1–67Not supported
68+Supportedsince Jul 9, 2019
Current: 157
Safari
1–17.1Not supported
17.2+Supportedsince Dec 11, 2023
Current: 27
MobileChrome Android
18–84Not supported
85+Supportedsince Aug 25, 2020
Current: 155
Firefox Android
4–67Not supported
68+Supportedsince Jul 9, 2019
Current: 157
Safari iOS
1–17.1Not supported
17.2+Supportedsince Dec 11, 2023
Current: 27

How to use

This feature is Baseline widely available — use it freely, no fallback needed.

Example

Full syntax and examples are on MDN: counter-set.

Feature detection

CSS · check before using
@supports (counter-set: initial) {
  /* styles that rely on counter-set */
}

/* or in JavaScript */
if (CSS.supports("counter-set", "initial")) {
  // use it
}

Documentation (MDN)

Specification

Sub-features

Support for each part of the feature (3). The overall table above shows when the whole feature works.

Sub-featureChromeEdgeFirefoxSafariChrome AndroidFirefox AndroidSafari iOS
counter-set85856817.2856817.2
counter-set.list-item85856817.2856817.2
counter-set.none85856817.2856817.2