css中按钮有四种状态
- 普通状态
- hover 鼠标悬停状态
- active 点击状态
- focus 取得焦点状态
.btn:focus{outline:0;} 可以去除按钮或a标签点击后的蓝色边框
下面的例子中.btn1用focus按钮会按下，不弹起
.btn2用active按钮点击按下，会弹起
html：
<button class="btn btn1">Save Settings</button>
<button class="btn btn2">Submit</button>
CSS：
.btn{
appearance: none;
background: #026aa7;
color: #fff;
font-size: 20px;
padding: 0.65em 1em;
border-radius: 4px;
box-shadow: inset 0 -4px 0 0 rgba(0,0,0,0.2);
margin-right: 1em;
cursor: pointer;
border:0;
}
.btn1:hover{
box-shadow: inset 0 -4px 0 0 rgba(0,0,0,0.6), 0 0 8px 0 rgba(0,0,0,0.5);
}
.btn1:focus{
position: relative;
top: 4px;
box-shadow: inset 0 3px 5px 0 rgba(0,0,0, 0.2);
outline: 0;
}
.btn2:hover{
box-shadow: inset 0 -4px 0 0 rgba(0,0,0,0.6), 0 0 8px 0 rgba(0,0,0,0.5);
}
.btn2:active{
position: relative;
top: 4px;
box-shadow: inset 0 3px 5px 0 rgba(0,0,0,0.2);
outline: 0;
}
.btn2:focus{
outline: 0;
}
原文地址：css中按钮的四种状态
