我正在尝试对网站中的所有输入进行样式设置，当它们具有值或具有焦点时，占位符将成为输入的标题（它移动到输入的顶部），但浏览器的默认行为会隐藏当有数据时占位符。
我真的想远离 JS 解决方案。
当前结果：
我的CSS：
input:focus::-webkit-input-placeholder {
transform: translate(-1rem,calc(-100% - 0.8rem));
font-size: 0.9rem !important;
opacity: 1 !important; //this doesnt seem to keep the placeholder visible
display:block !important; //this doesnt seem to keep the placeholder visible
}
input::-webkit-input-placeholder{
display:block !important; //this doesnt seem to keep the placeholder
opacity: 1 !important; //this doesnt seem to keep the placeholder
}
仅使用占位符无法完成此操作。这是样本。
body {
padding: 25px 10px
}
* {
margin: 0
}
.fieldOuter {
position: relative;
margin: 0 0 30px 0;
font-family: impact;
font-size: 16px
}
.fieldOuter input {
padding: 10px;
width: 250px;
transition: all 1s;
border: 2px solid #999;
font-size: 17px;
color: #666
}
.fieldOuter label {
position: absolute;
left:0px;
top: 0;
line-height:15px;
transition: all 0.5s;
overflow: hidden;
color: #999;
white-space: nowrap;
z-index: 1;
opacity: 0;
}
.fieldOuter input:focus + label {
opacity: 1;
top: -18px;
}
.fieldOuter input:focus {
outline: none;
border-color: rgba(82, 168, 236, 0.8);
}<div class="fieldOuter">
<input id="Name" placeholder="Name" type="text" />
<label for="Name">Name</label>
</div>
<div class="fieldOuter">
<input id="LastName" placeholder="Last Name" type="text" />
<label for="LastName">Last Name</label>
</div>