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# no-duplicate-dollar-variables Disallow duplicate dollar variables within a stylesheet. ```scss $a: 1; $a: 2; /** ↑ * These are duplicates */ ``` A dollar variable is considered a duplicate if it shadows a variable of the same name (see the [Sass documentation](https://sass-lang.com/documentation/variables#shadowing)). Two dollar variables are not duplicates if their scopes are unrelated. ```scss .one { $a: 1; /** ↑ * Not a duplicate */ } .two { $a: 2; /** ↑ * Not a duplicate */ } ``` ## Options ### `true` The following patterns are considered violations: ```scss $a: 1; $a: 2; ``` ```scss $a: 1; $b: 2; $a: 3; ``` ```scss $a: 1; .b { $a: 1; } ``` ```scss $a: 1; .b { .c { $a: 1; } } ``` ```scss $a: 1; @mixin b { $a: 1; } ``` The following patterns are _not_ considered violations: ```scss $a: 1; $b: 2; ``` ```scss $a: 1; .b { $b: 2; } ``` ### `ignoreInside: ["at-rule", "nested-at-rule"]` #### `"at-rule"` Ignores dollar variables that are inside both nested and non-nested at-rules (`@media`, `@mixin`, etc.). Given: ```json { "ignoreInside": ["at-rule"] } ``` The following patterns are _not_ considered warnings: ```scss $a: 1; @mixin c { $a: 1; } ``` ```scss $a: 1; .b { @mixin c { $a: 1; } } ``` #### `"nested-at-rule"` Ignores dollar variables that are inside nested at-rules (`@media`, `@mixin`, etc.). Given: ```json { "ignoreInside": ["nested-at-rule"] } ``` The following patterns are _not_ considered warnings: ```scss $a: 1; .b { @mixin c { $a: 1; } } ``` ### `ignoreInsideAtRules: ["array", "of", "at-rules"]` Ignores all variables that are inside specified at-rules. Given: ```json { "ignoreInsideAtRules": ["if", "mixin"] } ``` The following patterns are _not_ considered warnings: ```scss $a: 1; @mixin b { $a: 2; } ``` ```scss $a: 1; @if (true) { $a: 2; } ```
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