Created: 2023-01-05T23:43:40-06:00
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Use @extend for rules with explicit relationships and mixins for coincidental relationships.
An explicit relationship is something like a button, highlighted button, a disabled button.
A coincidental relationship is something like using the same color or font.
Microsoft browsers used to have a limit of 4095 selectors in a single CSS file.
@extend groups selectors together while mixins copy their body to each call site.