Sass Nested Rules and Properties
Sass Nested Rules
Sass lets you nest CSS selectors in the same way as HTML.
Look at an example of some Sass code for a site's navigation:
Example
SCSS Syntax:
nav {
ul {
margin: 0;
padding: 0;
list-style: none;
}
li {
display: inline-block;
}
a {
display: block;
padding: 6px 12px;
text-decoration: none;
}
}
Run Example »
Notice that in Sass, the ul, li, and a selectors are nested inside the nav selector.
While in CSS, the rules are defined one by one (not nested):
CSS Syntax:
nav ul {
margin: 0;
padding: 0;
list-style: none;
}
nav li {
display: inline-block;
}
nav a {
display: block;
padding: 6px 12px;
text-decoration: none;
}
Because you can nest properties in Sass, it is cleaner and easier to read than standard CSS.
Sass Nested Properties
Many CSS properties have the same prefix, like font-family, font-size and font-weight or text-align, text-transform and text-overflow.
With Sass you can write them as nested properties:
Example
SCSS Syntax:
font: {
family: Helvetica, sans-serif;
size: 18px;
weight: bold;
}
text: {
align: center;
transform: lowercase;
overflow: hidden;
}
The Sass transpiler will convert the above to normal CSS:
CSS Output:
font-family: Helvetica, sans-serif;
font-size: 18px;
font-weight: bold;
text-align: center;
text-transform: lowercase;
text-overflow: hidden;
