显示与隐藏
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>显示与隐藏</title>
<style>
body {
margin: 0;
}
div {
width: 200px;
height: 200px;
background-color: orange;
font: 30px/200px 'Arial';
color: red;
text-align: center;
margin: 0 auto;
border-radius: 50%;
}
</style>
<style>
/*display
值为none时，盒子会被隐藏，且不在页面中占位
*/
.box2 {
display: none;
transition: 1s;
}
.box1:hover ~ .box2 {
display: block;
}
.box2:hover {
display: block;
}
</style>
<style>
/*opacity
值为0~1，控制盒子的透明度，但是消失后，在页面中占位
*/
.box4 {
/*背景颜色不能操作文本*/
/*background-color: rgba(0,0,0,0);*/
opacity: 0;
/*过度效果*/
transition: 1s;
}
.box3:hover ~ .box4 {
opacity: 1;
}
.box4:hover {
opacity: 1;
}
</style>
<style>
.box6 {
width: 0;
height: 0;
/*超出content以外的内容如何处理：hidden隐藏*/
overflow: hidden;
transition: 1s 0s ease;
/*过渡得我属性个数可以自定义*/
/*transition-property: width, background-color, height;*/
transition-property: all;
}
.box5:hover ~ .box6 {
width: 200px;
height: 200px;
background-color: pink;
}
.box6:hover {
width: 200px;
height: 200px;
background-color: pink;
}
</style>
</head>
<body>
<div class="box1">1</div>
<div class="box2">2</div>
<div class="box3">3</div>
<div class="box4">4</div>
<div class="box5">5</div>
<div class="box6">6</div>
<div class="box7">7</div>
<div class="box8">8</div>
</body>
</html>