What Sass means by "@function rules may not contain style rules."
When writing a Sass function, you may run into an error message that may be confusing:
@function rules may not contain style rules.
What Sass is trying to tell you is that a line in your Sass function is computing a result that is neither assigned to a variable nor returned.
Keep in mind that all functions in Sass return something, Sass does not mutate objects.
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