## CSS :focus Selector
**Definition and Usage**
The :focus selector is used to select an element that has focus. This selector is typically used on form elements like input, textarea, and a tags that can get focus.
**Version:** CSS2
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## Browser Support
The numbers in the table indicate the version number of the browser that first fully supports this selector.
| Selector | Chrome | IE | Firefox | Safari | Opera |
|----------|--------|-----|---------|--------|-------|
| :focus | 1.0 | 8.0 | 1.0 | 1.0 | 7.0 |
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## CSS Syntax
```css
:focus {
css declarations;
}
```
---
## Example
Apply styles when the form input field gets focus:
```html
input:focus
{
background-color: yellow;
}
First name:
Last name:
Note: Click on the input field to see the effect.
```
---
## Related Resources
(/cssref/css-reference.html)
(/cssref/css-selectors.html)
(/css3/css3-tutorial.html)