What is the Sass @use rule?

The Sass @use rule is a new way of importing and using Sass modules in your stylesheets, introduced in Sass version 3.6. It allows you to import and use Sass modules directly in your stylesheets, similar to how you would import and use JavaScript modules in a JavaScript file.

With the @use rule, you can import a module by its file path, and use the module's variables, functions, and mixins directly in your stylesheet. For example, you can use the following code to import and use a module called "colors" in your stylesheet:

@use 'colors';
.my-class {
  color: colors.$primary;
}

The @use rule also allows for more fine-grained control over the imported module's exports, allowing you to only import the specific variables or mixins that you need. For example, you can use the following code to import only the primary and secondary color variables from the "colors" module:

@use 'colors' with ($primary, $secondary);

Additionally, you can also rename the imported variables and mixins to avoid naming conflicts with existing variables and mixins in your stylesheet.

@use 'colors' as mycolors;
.my-class {
  color: mycolors.$primary;
}

The @use rule also allows for a more modular approach to your Sass code, as it allows you to break up your stylesheets into smaller, more manageable chunks, making it easier to make changes and updates without affecting other parts of your codebase.

It's worth noting that the @use rule is not compatible with the old way of importing Sass files using the @import rule. If you want to use the @use rule, you need to make sure that you're using Sass version 3.6 or higher, and you need to update your project's file structure and imports accordingly.

The @use rule is a powerful tool for managing and organizing your Sass code, as it allows you to import and use modules in a way that is similar to how you would import and use modules in JavaScript, making it easier to understand and maintain your codebase. It also promotes code reusability, making it easier to share and import common styles and functionality across different stylesheets in your project.