README.md

Min selector uniqueness ratio

Enforce a minimum ratio of unique selectors across the stylesheet.

a { color: red; }
a { color: blue; }
/*↑
* Repeated selectors reduce the uniqueness ratio */

This rule calculates the ratio of unique selectors out of all selectors in the stylesheet. A low ratio indicates systemic repetition that may point to poorly structured CSS. Unlike stylelint's built-in no-duplicate-selectors, this rule flags file-wide repetition by ratio rather than exact duplicates within a block.

Selectors inside at-rules (e.g. @media) and nested rules are all counted.

Options

Number

The option must be between 0 and 1, where 1 means every selector must be unique and 0 effectively disables the rule.

Given:

0.66

the following are considered violations:

a { color: red; }
a { color: blue; }
a { color: green; }

The following patterns are not considered problems:

a { color: red; }
b { color: blue; }
c { color: green; }

a { color: red; }
a { color: blue; }
b { color: green; }