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In an HTML document, the CSS ID selector matches an element based on the value of its id attribute. The selected element's ID attribute must match exactly the value given in the selector.

Syntax

#id_value { style properties }

Note that this is equivalent to the following attribute selector:

[id=id_value] { style properties }

Example

CSS

div#identified {
  background-color: skyblue;
}

HTML

<div id="identified">This div has a special ID on it!</div>
<div>This is just a regular div.</div>

Result

Specifications

Specification Status Comment
Selectors Level 4
The definition of 'ID selectors' in that specification.
Working Draft  
Selectors Level 3
The definition of 'ID selectors' in that specification.
Recommendation  
CSS Level 2 (Revision 1)
The definition of 'ID selectors' in that specification.
Recommendation  
CSS Level 1
The definition of 'ID selectors' in that specification.
Recommendation Initial definition

Browser compatibility

Feature Chrome Edge Firefox (Gecko) Internet Explorer Opera Safari
Basic support (Yes) (Yes) (Yes) (Yes) (Yes) (Yes)
Feature Android Chrome for Android Edge Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile
Basic support ? ? (Yes) ? ? ? ?

Document Tags and Contributors

 Last updated by: mfluehr,