Selector list

The CSS selector list (,) selects all the matching nodes.

/* Selects all matching elements */
div {
  border: red 2px solid;

To reduce the size of style sheets, one can group selectors in comma-separated lists.


element, element, element { style properties }


Single Line Grouping

Grouping selectors in a single line using a comma-separated lists.

h1, h2, h3, h4, h5, h6 { font-family: helvetica; }

Multi Line Grouping

Grouping selectors in a multiple lines using a comma-separated lists.

article {
  font-size: 1.1em;

Selector list invalidation

A downside to using selector lists is that the following aren't equivalent:

h1 { font-family: sans-serif }
h2:maybe-unsupported { font-family: sans-serif }
h3 { font-family: sans-serif }
h1, h2:maybe-unsupported, h3 { font-family: sans-serif }

This is because a single unsupported selector in a selector list invalidates the whole rule.

A way to remedy this us to use the :is() selector, which simply ignores invalid selectors in its arguments, but at the cost of all selectors having the same specificity, because of how :is() calculates specificity.

h1 { font-family: sans-serif }
h2:maybe-unsupported { font-family: sans-serif }
h3 { font-family: sans-serif }
:is(h1, h2:maybe-unsupported, h3) { font-family: sans-serif }


Specification Status Comment
Selectors Level 4
The definition of 'Selector Lists' in that specification.
Working Draft Renamed to "selector list"
CSS Level 1
The definition of 'grouping' in that specification.
Recommendation Initial definition

Browser compatibility

ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
Selector list (,)Chrome Full support 1Edge Full support 12Firefox Full support 1IE Full support 3Opera Full support 3.5Safari Full support 1WebView Android Full support ≤37Chrome Android Full support 18Firefox Android Full support 4Opera Android Full support 10.1Safari iOS Full support 1Samsung Internet Android Full support 1.0


Full support
Full support

See also

  • The :is() and :where() pseudo-classes, which don't have the legacy mistake that is selector list invalidation.