In CSS, the ":hover" selector is used to select the element on which the mouse pointer is floating, and then set the style for it. The syntax format is "element:hover{css style};"; ":hover" is required Place after ":link" and ":visited" (if present) so that the style can take effect.
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: The 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.
In the CSS definition, :hover must be placed after :link and :visited (if present) for the style to take effect.
: 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.
css :hover selector usage
Usage 1:
This What it means is: when the mouse is hovering over the style a, the background color of a is set to yellow
a:hover
{
background-color:yellow;
}This is the most common usage, it just changes the style through a
Usage 2:
Use a to control the style of other blocks:
Use a to control the sub-element b of a:
.a:hover .b {
background-color:blue;
}Use a to control the brothers of a Element c (sibling element):
.a:hover + .c {
color:red;
}Use a to control the nearby element d of a:
.a:hover ~ .d {
color:pink;
}To summarize:
1. What’s in the middle Do not add Control child elements;
2. ' ' Controls sibling elements (sibling elements);
3. '～' Controls nearby elements;
Example
Use a button to control the motion state of a box. When the mouse moves over the button, the box stops moving. When the mouse moves away, the box continues to move.
body code:
<body>
<div class="btn stop">stop</div>
<div class="animation"></div>
</body>css style:
<style>
.animation {
width: 100px;
height: 100px;
background-color: pink;
margin: 100px auto;
animation: move 2s infinite alternate;
-webkit-animation: move 2s infinite alternate;
}
@keyframes move {
0% {
transform: translate(-100px, 0);
}
100% {
transform: translate(100px, 0);
}
}
.btn {
padding: 20px 50px;
background-color: pink;
color: white;
display: inline-block;
}
.stop:hover ~ .animation {
-webkit-animation-play-state: paused;
animation-play-state: paused;
}
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