html - 类似边界的过渡导致内容移动

Question

标题几乎概括了它，这是到目前为止的演示和 CSS。

.edit.input {
    display: inline-block;
}

.edit.input input {
    border: none;
    border-bottom: 1px solid #D4D4D5;
}

.edit.input input:focus {
    outline: none;
    border: transparent;
}

.bar {
    display: block;
}

.bar:after {
    content: '';
    display: block;
    transform: scaleX(0);
    bottom: -2px;
    height: 2px;
    background: #48afb9;
    transition: 300ms ease all;
}

.edit.input input:focus ~ .bar:after {
    transform: scaleX(1);
}

<div class="edit input">
    <input type="text">
    <span class="bar"></span>
</div>

<br>
<br> stuff
<br> other stuff

https://jsfiddle.net/a554h0oo/

我要实现的目标:

这是我得到的:

Answer 1

当您设置 border : transparent 时，您正在将顶部的边框宽度重置为 1。

改为设置边框颜色

.edit.input {
    display: inline-block;
}

.edit.input input {
    border: none;
    border-bottom: 1px solid #D4D4D5;
}

.edit.input input:focus {
  outline: none;
    border-color: transparent; /* changed */
}

.bar {
    display: block;
}

.bar:after {
    content: '';
    display: block;
    transform: scaleX(0);
    bottom: -2px;
    height: 2px;
    background: #48afb9;
    transition: 300ms ease all;
}

.edit.input input:focus ~ .bar:after {
    transform: scaleX(1);
}

<div class="edit input">
    <input type="text">
    <span class="bar"></span>
</div>

<br>
<br> stuff
<br> other stuff