Can SCSS Variables Be Used Directly Within CSS Selectors?

Dynamic Selector Syntax in SCSS

Variables offer a convenient way to parameterize CSS stylesheets, allowing for highly dynamic and reusable code. However, the question arises: can variables be leveraged within CSS selectors?

The example provided showcases an attempt to use a variable, $gutter, in a selector as follows:

<code class="scss">.grid+$gutter {
    background: red;
}</code>

The desired output is a class selector, .grid10, with a background color of red. However, this particular syntax is not valid in SCSS.

To achieve the desired functionality, SCSS offers an alternative syntax involving the #{} placeholder:

<code class="scss">.grid#{$gutter} {
    background: red;
}</code>

In this case, the variable $gutter is interpolated into the selector using the #{} syntax. The resulting CSS output is:

<code class="css">.grid10 {
    background: red;
}</code>

Additionally, variables can be interpolated within string contexts, such as URLs:

<code class="scss">background: url('/ui/all/fonts/#{$filename}.woff')</code>

This allows for dynamic construction of URLs and other string-based properties.

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