如何防止子元素的字体大小更改以在 CSS 中拉伸父容器

Question

I have a simple nav bar:

<nav>
 <a href="#">Home</a>
 <a href="#">About</a>
 <a href="#">Register</a>
</nav>

with following CSS for nav and a tags:

nav
{
    background-color:black;
    color:white;
    text-align:center;
    font-size:150%;
    padding:2%;    
}
nav a
{
    text-decoration:none;
    color:white;
    padding:2%;    
}
nav a:hover
{
    background-color:white;
    color:black;
    font-size:120%;            
}

It looks pretty much as I want it to, except that nav container stretches on hover, because font size is larger. How can I prevent nav from stretching?

Answer 1

There is an easier and prettier way. You should try this instead.

nav
{
    background-color:black;
    color:white;
    text-align:center;
    font-size:150%;   
}
nav a
{
    text-decoration:none;
    color:white;
    padding:2%;    
    display:inline-block;
}
nav a:hover
{
    background-color:white;
    color:black;
    transform: scale(1.2);
    -webkit-transform: scale(1.2);
    -ms-transform:scale(1.2);
}

Answer 2

Adding a "line height" prevents the parent container from changing size.

nav a
{
    line-height: 5%;
    text-decoration:none;
    color:white;
    padding:2%;    
}

Answer 3

使用其他值而不是 %。

Answer 4

Please have a look at the code here: https://codepen.io/polinq/pen/xxbgZOM So essentially I put a height on the nav element and removed padding. And centered it using flex.

nav
{
    background-color:black;
    color:white;
    text-align:center;
    font-size:150%;

    height: 70px;
    display:flex;
    align-items: center;
    justify-content: center;

}
nav a
{
    text-decoration:none;
    color:white;
    padding:2%;    
}
nav a:hover
{
    background-color:white;
    color:black;
    font-size:120%;  

}