HTML5+CSS3小实例之伸缩式动态搜索框
技术栈：HTML+CSS
字体图标库：font-awesome
效果：
源码：
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=utf-8">
<meta name="viewport" content="width=device-width,initial-scale=1,maximum-scale=1,user-scalable=no">
<title>伸缩式动态搜索框</title>
<link href="https://cdn.bootcdn.net/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css" rel="stylesheet">
<link rel="stylesheet" href="../css/36.css">
</head>
<body>
<div class="search-box">
<input type="text" class="search-txt" placeholder="想搜啥？">
<a class="search-btn">
<i class="fa fa-search" aria-hidden="true"></i>
</a>
</div>
</body>
</html>
body{
/* 初始化 取消内外边距 */
margin: 0;
padding: 0;
/* 100%窗口高度 */
height: 100vh;
/* 渐变背景 */
background: linear-gradient(200deg,#e3eeff,#f3e7e9);
}
.search-box{
/* 绝对定位 水平垂直居中 */
position: absolute;
top: 50%;
left: 50%;
transform: translate(-50%,-50%);
background: #2f3640;
height: 40px;
border-radius: 40px;
padding: 10px;
}
.search-txt{
border: none;
background: none;
outline: none;
float: left;
padding: 0;
color: white;
font-size: 16px;
line-height: 40px;
width: 0;
/* 动画过渡 */
transition: 0.4s;
}
.search-btn{
color: #e84118;
float: right;
width: 40px;
height: 40px;
border-radius: 50%;
background: #2f3640;
/* 弹性布局 水平垂直居中 */
display: flex;
justify-content: center;
align-items: center;
cursor: pointer;
/* 动画过渡 */
transition: 0.4s;
}
/* 鼠标移入文本框变化 */
.search-box:hover .search-txt{
width: 200px;
padding: 0 6px;
}
/* 鼠标移入搜索按钮变化 */
.search-box:hover .search-btn{
background: #fff;
}
