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Relative length units in CSS

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2023-08-26 20:57:031305browse

In CSS, relative length units are used to specify the length relative to another length attribute.

##8##9%Example
Serial number Unit and description
1 em

Relative to the font size of the element, that is, 4em means 4 times the current font size.

2 ex

x-height relative to the current font
3 ch

Width relative to 0
4 rem

Font size relative to the root element
5 vw

1% relative to the viewport width*
6 vh

1% relative to the viewport height*
7 vmin

1% of the smaller size relative to the viewport*
vmax1% of the larger size relative to the viewport*
Relative to parent element

Let’s see An example of using relative length units:

Demonstration 

<!DOCTYPE html>
<html>
<head>
<style>
.demo {
   text-decoration: overline underline;
   text-decoration-color: blue;
   font-size: 1.4em;
}
</style>
</head>
<body>
<h1>Details</h1>
<p class="demo">Examination Center near ABC College.</p>
<p class="demo2">Exam begins at 9AM.</p>
</body>
</html>

Output

CSS 中的相对长度单位Example

Now let’s look at another An example −

Real-time demonstration

<!DOCTYPE html>
<html>
<head>
<style>
.demo {
   text-decoration: overline underline;
   text-decoration-color: blue;
   font-size: 4ch;
}
</style>
</head>
<body>
<h1>Details</h1>
<p class="demo">Examination Center near ABC College.</p>
<p class="demo2">Exam begins at 9AM.</p>
</body>
</html>

Output

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