How Can Sass Variables Be Dynamically Set Based on HTML Classes?

Dynamically Setting Sass Variables Based on HTML Class

In CSS, styling can be applied to HTML elements using classes. Variables in Sass allow for the creation of reusable and dynamic stylesheets. This article explores how to dynamically set Sass color variables depending on the class applied to an HTML element.

Approach Using Mixins or Includes

To achieve this, Sass mixins or includes can be utilized. Mixins are reusable code snippets that can be included in different parts of a stylesheet. Includes, on the other hand, allow for importing external CSS files into the current stylesheet.

Using Includes

One way to implement dynamic Sass variables is through includes. An example is provided below:

<code class="sass">/* _theme.scss */

section.accent {
    background: $accent;
}

.foo {
    border: $base;
}

.bar {
    color: $flat;
}</code>

<code class="sass">/* main.scss */

html {
  &amp;.sunrise {
    $accent: #37CCBD;
    $base: #3E4653;
    $flat: #eceef1;

    @import "theme";
  }

  &amp;.moonlight {
    $accent: #18c;
    $base: #2a2a2a;
    $flat: #f0f0f0;

    @import "theme";
 }
}</code>

Using Mixins

Alternatively, a mixin that takes three color arguments can be defined:

<code class="sass">@mixin theme($accent, $base, $flat) {
    // ... styling using the provided colors ...
}</code>

This mixin can then be reused in place of the include, providing flexibility in managing themes.

Conclusion

By leveraging Sass mixins or includes, dynamically setting color variables based on HTML classes is achievable. This approach allows for the creation of adaptable and reusable stylesheets.

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