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node_modules/stylelint-scss/src/rules/percent-placeholder-pattern/README.md

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+# percent-placeholder-pattern
+
+Specify a pattern for `%`-placeholders.
+
+```scss
+    %foobar { display: flex; }
+/** ↑
+ * The pattern of this */
+```
+
+## Options
+
+`regex` or `string`
+
+A string will be translated into a RegExp like so `new RegExp(yourString)` — so be sure to escape properly.
+
+Nested selectors will be resolved before checking.
+
+The selector value *after `%`* will be checked. No need to include `%` in your pattern.
+
+### E.g. `/^foo-[a-z]+$/`
+
+The following patterns are considered warnings:
+
+```scss
+%myriad { display: flex; }
+```
+
+```scss
+%foo-bar { 
+  &-supa { display: flex; } /* %foo-bar matches, but %foo-bar-supa doesn't */
+}
+```
+
+```scss
+%foo- { /* %foo- on the 1st leves doesn't match */
+  &bar { display: flex; }
+}
+```
+
+The following patterns are *not* considered warnings:
+
+```scss
+%foo-aimp { display: flex; }
+```
+
+```scss
+%foo-bar { 
+  &lignt { display: flex; }
+}
+```
+
+```scss
+.p {
+  @extend %mathy; // The rule only checks placeholder definitions
+}
+```