Summary
An asterisk (*) is the universal selector for CSS. It matches a single element of any type. Omitting the asterisk with simple selectors has the same effect. For instance, *.warning and .warning are considered equal.
In CSS 3, the asterisk may be used in combination with namespaces:
- ns|*- matches all elements in namespace ns
- *|*- matches all elements
- |*- matches all elements without any declared namespace
Examples
* [lang^=en] {
  color:green;
}
*.warning {
  color:red;
}
*#maincontent {
  border: 1px solid blue;
.floating {
  float: left
}
/* automatically clear the next sibling after a floating element */
.floating + * {
  clear: left;
}
<p class="warning"> <span lang="en-us">A green span</span> in a red paragraph. </p> <p id="maincontent" lang="en-gb"> <span class="warning">A red span</span> in a green paragraph. </p>
Specifications
| Specification | Status | Comment | 
|---|---|---|
| Selectors Level 4 The definition of 'universal selector' in that specification. | Working Draft | No changes | 
| Selectors Level 3 The definition of 'universal selector' in that specification. | Recommendation | Defined behavior in regard of namespaces and added hint that omitting the selector is allowed within pseudo-elements | 
| CSS Level 2 (Revision 1) The definition of 'universal selector' in that specification. | Recommendation | Initial definition | 
Browser compatibility
| Feature | Chrome | Edge | Firefox (Gecko) | Internet Explorer | Opera | Safari | 
|---|---|---|---|---|---|---|
| Basic support | (Yes) | (Yes) | 1.0 (1.7 or earlier) | 7 | (Yes) | (Yes) | 
| Combination with namespace support | (Yes) | (Yes) | 1.0 (1.7 or earlier) | 9 | 8 | 1.3 | 
| Feature | Android | Chrome for Android | Edge | Firefox Mobile (Gecko) | IE Mobile | Opera Mobile | Safari Mobile | 
|---|---|---|---|---|---|---|---|
| Basic support | ? | ? | (Yes) | 1.0 (1) | ? | ? | ? | 
| Combination with namespace support | ? | ? | (Yes) | ? | ? | ? | ? | 
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                       Contributors to this page: 
        ArielS, 
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                       Last updated by:
                      ArielS,