Sass Variables in CSS calc() Function: Overcoming Evaluation Obstacles

When working with Sass stylesheets, utilizing the calc() function with Sass variables can encounter challenges. This discrepancy arises when the calc() function fails to recognize variable substitution, resulting in the display of an unresolved variable, as seen in the provided example.

To resolve this issue, two methods can be employed:

Interpolation:

For instances where the variable solely operates within the calc() function, the interpolation approach can be employed. By using this interpolation "#{}" around the variable, the Sass compiler ensures its evaluation and substitution before the calc() function operates on it.

The Border-Box Solution:

An alternative to interpolation, particularly suited for scenarios where the variable influences multiple properties, is the border-box solution. This technique entails setting the box-sizing property to the border-box, ensuring that padding and border are contained within the element's width and height. By subsequently setting height to 100% and adding the desired padding, the intended result is achieved without relying on the calc() function.