Sass is a powerful CSS pre-processor that allows you to write more efficient and maintainable stylesheets. One of the features that Sass provides is interpolation, which allows you to use variables in certain places where Sass wouldn't normally allow you to use them.
Interpolation is represented by the #{} syntax, which is used to insert the value of a variable into a string. It is particularly useful when you need to use a variable as part of a CSS property or a selector.
For example, you may want to create a set of classes for different font sizes, where the class name includes the font size value.
$font-size: 16px;
.fs-#{$font-size} {
font-size: $font-size;
}This will generate the CSS:
.fs-16px {
font-size: 16px;
}Interpolation can also be used inside a property. For example, you may want to use a variable for the background-image property.
$image-path: 'images/bg.jpg';
body {
background-image: url(#{$image-path});
}This will generate the CSS:
body {
background-image: url(images/bg.jpg);
}Interpolation can also be used inside @import and @include statements. For example, you may have a set of variables that define the path to your CSS files and you want to use them in your @import statements.
$css-path: 'css';
@import "#{$css-path}/reset";
@import "#{$css-path}/base";This will generate the CSS:
@import "css/reset"; @import "css/base";
In conclusion, Sass interpolation is a powerful feature that allows you to use variables in places where Sass wouldn't normally allow you to use them. It makes your stylesheets more flexible and maintainable by allowing you to use variables in class names, properties, and @import and @include statements. With the use of interpolation, you can easily make global changes to your stylesheets without having to go through and update each instance individually.