input type="file" 修改默认样式
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1"/>
<!-- 为移动设备添加 viewport -->
<meta name="viewport" content="width=device-width,initial-scale=1, maximum-scale=1, minimum-scale=1, user-scalable=no">
<!-- 添加到主屏后的标题（iOS 6 新增） -->
<meta name="apple-mobile-web-app-title" content="">
<meta name="format-detection" content="telephone=no">
<!-- 是否启用 WebApp 全屏模式，删除苹果默认的工具栏和菜单栏 -->
<meta name="apple-mobile-web-app-capable" content="yes"/>
<title>图片预加载</title>
<title></title>
</head>
<html>
<body>
<style>
.file {
position: relative;
display: inline-block;
background: #D0EEFF;
border: 1px solid #99D3F5;
border-radius: 4px;
width:100px;
height: 36px;
display: inline-block;
line-height: 36px;
text-decoration: none;
}
.file input {
position: absolute;
right: 0;
top: 0;
width: 100%;
height: 100%;
overflow: hidden;
display: inline-block;
line-height: 36px;
opacity: 0;
}
</style>
<div class="file">
<input type="file">
</div>
<body>
</html>
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