如何在CSS中浮动标签 [英] How to do floating of labels in CSS
本文介绍了如何在CSS中浮动标签的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我想在输入中显示输入的标签,以便当我单击输入时,标签将进行动画处理并移到输入上方,并更改输入边框的样式。
I want to display the label of an input inside its input, so that when I click the input, the label will animate and go above the input and change the styles of the input's border.
像这样:
* {
margin: 0;
padding: 0;
}
form {
width: 100%;
max-width: 500px;
margin: 0 auto;
outline: 1px solid lightgrey;
padding: 10px;
}
label, input[type='text'], input[type='password'] {
font-size: 12pt;
padding: 8px;
}
label {
color: grey;
}
input {
border: none;
outline: none;
border-bottom: 1px solid grey;
}
<form>
<label for="username">Username</label>
<input id="username" name="username" type="text"/>
<br/>
<label for="password">Password</label>
<input id="password" name="password" type="password"/>
<br/>
<input type="submit" value"login"/>
</form>
如何使用CSS实现呢?
How can I achieve this with CSS?
推荐答案
这看起来很像Google的新材料设计输入。
我为您创建了自定义输入,看起来像您想要的。
This looks a lot like the Google new material design inputs.
I created custom inputs for you that look like what you are looking for.
.input-group {
position: relative;
margin: 40px 0 20px;
}
input {
font-size: 18px;
padding: 10px 10px 10px 5px;
display: block;
width: 300px;
border: none;
border-bottom: 1px solid #757575;
}
input:focus {
outline: none;
}
label {
color: #999;
font-size: 18px;
font-weight: normal;
position: absolute;
pointer-events: none;
left: 5px;
top: 10px;
transition: 0.2s ease all;
-moz-transition: 0.2s ease all;
-webkit-transition: 0.2s ease all;
}
input:focus ~ label,
input:valid ~ label {
top: -20px;
font-size: 14px;
color: #4285f4;
}
.bar {
position: relative;
display:block;
width:315px;
}
.bar:before,
.bar:after {
content: '';
height: 2px;
width: 0;
bottom: 1px;
position: absolute;
background: #4285f4;
transition: 0.2s ease all;
-moz-transition: 0.2s ease all;
-webkit-transition: 0.2s ease all;
}
.bar:before {
left: 50%;
}
.bar:after {
right: 50%;
}
input:focus ~ .bar:before,
input:focus ~ .bar:after {
width: 50%;
}
.highlight {
position: absolute;
height: 60%;
width: 100px;
top: 25%;
left: 0;
pointer-events: none;
opacity: 0.5;
}
input:focus ~ .highlight {
-webkit-animation: inputHighlighter 0.3s ease;
-moz-animation: inputHighlighter 0.3s ease;
animation: inputHighlighter 0.3s ease;
}
/* animations */
@-webkit-keyframes inputHighlighter {
from { background: #4285f4; }
to { width: 0; background: transparent; }
}
@-moz-keyframes inputHighlighter {
from { background: #4285f4; }
to { width: 0; background: transparent; }
}
@keyframes inputHighlighter {
from { background: #4285f4; }
to { width: 0; background: transparent; }
}
<div class="input-group">
<input type="text" required>
<span class="highlight"></span>
<span class="bar"></span>
<label>Username</label>
</div>
<div class="input-group">
<input type="password" required>
<span class="highlight"></span>
<span class="bar"></span>
<label>Password</label>
</div>
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