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notes/node_modules/stylelint/lib/rules/selector-max-specificity/README.md

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2017-03-09 13:16:08 -05:00
# selector-max-specificity
Limit the specificity of selectors.
```css
.foo, #bar.baz span, #hoo { color: pink; }
/** ↑ ↑ ↑
* Each of these selectors */
```
Visit the [Specificity Calculator](https://specificity.keegan.st) for visual representation of selector specificity.
This rule ignores selectors with variable interpolation (`#{$var}`, `@{var}`, `$(var)`).
This rule ignores selectors containing the `:not()` or `:matches()` pseudo-classes.
This rule resolves nested selectors before calculating the specificity of a selector.
## Options
`string`: Maximum specificity allowed.
Format is `"id,class,type"`, as laid out in the [W3C selector spec](https://drafts.csswg.org/selectors/#specificity-rules).
For example, with `"0,2,0"`:
The following patterns are considered warnings:
```css
#foo {}
```
```css
.foo .baz .bar {}
```
```css
.foo .baz {
& .bar {}
}
```
```css
.foo {
color: red;
@nest .baz .bar & {
color: blue;
}
}
```
The following patterns are *not* considered warnings:
```css
div {}
```
```css
.foo div {}
```
```css
.foo div {
& div a {}
}
```
```css
.foo {
& .baz {}
}
```
```css
.foo {
color: red;
@nest .baz & {
color: blue;
}
}
```