所属分类：web前端开发
要在一个元素悬停时影响其他元素，一个元素应该位于另一个元素内，即父子元素或同级元素。将鼠标光标放在一个元素上时，另一个元素的属性应该发生变化，即悬停效果可见。
在此示例中，我们将在鼠标悬停时更改 div 内两个框的颜色 -
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<html>
<head>
<style>
.parent {
width: 500px;
height: 150px;
background-color: orange;
}
.child {
margin-left: 39px;
width: 100px;
height: 40px;
background-color: blue;
color: white;
}
div {
border: 3px solid red;
}
.parent:hover .child {
background-color: green;
}
</style>
</head>
<body>
<h1>Change the color</h1>
<p> Keep the mouse cursor inside the orange colored div to change the color of the two blue boxes.</p>
</h3>
<div class="parent">In the div
<div class="child">
Box1
</div>
<br>
<div class="child">
Box2
</div>
<br>
</div>
</body>
</html>
在此示例中，我们将在 div 悬停时更改按钮元素的颜色 -
<!DOCTYPE html>
<html>
<head>
<style>
body {
text-align: center;
}
.parent {
width: 600px;
height: 200px;
background-color: blue;
}
.child {
width: 30px;
height: 30px;
background-color: grey;
}
div {
outline: 1px solid black;
}
.parent:hover .child {
background-color: yellow;
}
.child {
background-color: orange;
border: none;
padding: 50px 80px;
margin-top: 40px;
text-align: center;
text-decoration: none;
display: inline-block;
font-size: 16px;
}
</style>
</head>
<body>
<h1>Change the color</h1>
<p> Keep the mouse cursor inside the blue colored div to change the color of the orange box to
yellow.</p>
</h3>
<div class="parent">
<button class="child">
Box
</button>
</div>
</body>
</html>
