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css hover is a selector used to select the element on which the mouse pointer floats. The setting syntax of this selector is such as "a:hover{background-color:yellow;}".
The operating environment of this article: Windows7 system, HTML5&&CSS3 version, Dell G3 computer.
:hover selector is used to select the element on which the mouse pointer is floating.
Tip: The :hover selector can be used on all elements, not just links.
Tips: The :link selector sets the style of links pointing to pages that have not been visited, the :visited selector is used to set links to pages that have been visited, and the :active selector is used for active links.
Note: In the CSS definition, :hover must be placed after :link and :visited (if present) for the style to take effect.
Example
Select the element the mouse pointer is floating on and set its style:
Code:
<!DOCTYPE html>
<html>
<head>
<style>
a:hover
{
background-color:yellow;
}
</style>
</head>
<body>
<a href="http://www.w3school.com.cn">W3Sschool</a>
<a href="http://www.google.com">Google</a>
<a href="http://www.wikipedia.org">Wikipedia</a>
<p><b>注释：</b>:hover 选择器鼠标指针在其上浮动的链接设置样式。</p>
</body>
</html>Effect:
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