在悬停上添加边框会移动周围的元素 [英] Adding border on hover shifts surrounding elements

问题描述

将鼠标悬停在上，您就会看到元素的移动方式.为什么?

Just hover on 'a headline' in the snippet below and you will see how elements are moving. Why?

没有边距..并且它们仅在我向inline-block元素添加边框时才移动.尝试在section.twelve a中添加更多边框宽度，例如:

There's no margin .. And they're only moving when I add border to the inline-block element. Try to add more border width in section.twelve a like:

section.twelve a {
        border-bottom: 10px solid #FFFAFF;
    }

但是，如果您删除边框，一切都很好.为什么会出现这种情况?只是边界吗?

But if you remove the border everything's fine.. Why is this behavior ? and is it only for border?

我只想在元素中添加任何样式，而不会影响其他样式.

I just want to add any styles to the element without effecting the others.

section{
    position: relative;
    height: 300px;
    padding: 15px 80px;
    z-index: 1;
}

section h1{
    font-size:3em;
    font-weight: 100;
    line-height: 1.3;
 
}

section a {
    position: relative;
    display: inline-block;
    text-decoration: none;
    transition: all 0.3s ease-in-out;
    vertical-align: bottom;
}

section.twelve {
    background: #121A5A;
    color: #FFFAFF;
}
section.twelve a {
    color:#D8315B;
    font-weight: 700;
    overflow: hidden;
    padding: 0px 5px;
    transition all 0.2s ease;
    border-bottom: 5px solid #FFFAFF;
}

.twelve a:before{
    content: "";
    top:0; left: 0;
    position: absolute;
    width:100%; height: 100%;
    background: #FFFAFF;
    z-index: -1;
    transition: all 0.2s ease;
    transform: translateX(100%);
}
.twelve a:hover::before {
    transform: translateX(-95%);
    background: #D8315B;
}
.twelve a:hover{
    color: #FFFAFF;
    transform: translateX(5px);
    border-bottom: 1px solid #FFFAFF;
}

<section class="twelve">
        <h1>Write <a href="#">a headline</a> that makes people do kind of a double take whenthey read it.</h1>
    </section>

推荐答案

添加或更改边框的宽度时，将更改元素的大小.因此，通过在悬停时添加边框，该框会扩大以占据更多空间，这自然会改变周围文本/元素的位置.

When you add, or change the width, of a border, that changes the size of the element. Hence, by adding the border on hover, the box grows to occupy more space, which naturally shifts the position of surrounding text / elements.

解决此问题的一种方法是始终显示边框，因此框的大小是固定的.当边框不可见时，它是透明的.

One method to resolve this issue is to always have the border present, so the size of the box is fixed. When the border shouldn't be visible, it's transparent.

这是一个例子:

section {
  position: relative;
  height: 300px;
  padding: 15px 80px;
  z-index: 1;
}
section h1 {
  font-size: 3em;
  font-weight: 100;
  line-height: 1.3;
}
section a {
  position: relative;
  display: inline-block;
  text-decoration: none;
  transition: all 0.3s ease-in-out;
  vertical-align: bottom;
}
section.twelve {
  background: #121A5A;
  color: #FFFAFF;
}
section.twelve a {
  color: #D8315B;
  font-weight: 700;
  overflow: hidden;
  padding: 0px 5px;
  transition all 0.2s ease;
  border-bottom: 5px solid transparent;   /* ADJUSTMENT */
}
.twelve a:before {
  content: "";
  top: 0;
  left: 0;
  position: absolute;
  width: 100%;
  height: 100%;
  background: #FFFAFF;
  z-index: -1;
  transition: all 0.2s ease;
  transform: translateX(100%);
}
.twelve a:hover::before {
  transform: translateX(-95%);
  background: #D8315B;
}
.twelve a:hover {
  color: #FFFAFF;
  transform: translateX(5px);
  border-bottom: 5px solid white;       /* ADJUSED */
}

<section class="twelve">
  <h1>Write <a href="#">a headline</a> that makes people do kind of a double take whenthey read it.</h1>
</section>

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