ID selectors
The CSS ID selector matches an element based on the value of the element's id attribute. In order for the element to be selected, its id attribute must match exactly the value given in the selector.
css
/* The element with id="demo" */
#demo {
border: red 2px solid;
}
Syntax
css
#id_value { style properties }
Note that syntactically (but not specificity-wise), this is equivalent to the following attribute selector:
css
[id=id_value] { style properties }
Examples
CSS
css
#identified {
background-color: skyblue;
}
HTML
html
<div id="identified">This div has a special ID on it!</div>
<div>This is just a regular div.</div>
Result
Specifications
| Specification |
|---|
| Selectors Level 4 # id-selectors |
Browser compatibility
| desktop | mobile | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
ID selector ( #idName) | |||||||||||