解决方法
以下是完整的代码来完成样式的div,就像twitter登录输入一样.蓝色边框的样式是选择器div [contenteditable]：焦点的框阴影和边框样式.
Live demo here (click).
标记：
<div contenteditable="true">Username or email</div>
CSS：
div[contenteditable]:focus {
border: 1px solid rgb(86,180,239);
Box-shadow: 0px 1px 3px rgba(0,0.05) inset,0px 0px 8px rgba(82,168,236,0.6);
}
div[contenteditable] {
width: 97%;
max-width: 280px;
margin-right: 10px;
font-family: Arial,sans-serif;
-webkit-Box-shadow: inset 0 1px 3px rgba(0,.05),0 1px 0 rgba(255,255,.075);
Box-shadow: inset 0 1px 3px rgba(0,.075);
display: inline-block;
padding: 4px;
margin: 0;
outline: 0;
background-color: #fff;
border: 1px solid #ccc;
border-radius: 3px;
font-size: 13px;
line-height: 20px;
}
