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node_modules/stylelint/lib/utils/isStandardSyntaxSelector.mjs

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+import hasInterpolation from './hasInterpolation.mjs';
+
+/**
+ * Check whether a selector is standard
+ *
+ * @param {string} selector
+ * @returns {boolean}
+ */
+export default function isStandardSyntaxSelector(selector) {
+	// SCSS or Less interpolation
+	if (hasInterpolation(selector)) {
+		return false;
+	}
+
+	// SCSS placeholder selectors
+	if (selector.startsWith('%')) {
+		return false;
+	}
+
+	// SCSS nested properties
+	if (selector.endsWith(':')) {
+		return false;
+	}
+
+	// Less :extend()
+	if (/:extend(?:\(.*?\))?/.test(selector)) {
+		return false;
+	}
+
+	// Less mixin with resolved nested selectors (e.g. .foo().bar or .foo(@a, @b)[bar])
+	if (/\.[\w-]+\(.*\).+/.test(selector)) {
+		return false;
+	}
+
+	// Less non-outputting mixin definition (e.g. .mixin() {})
+	if (selector.endsWith(')') && !selector.includes(':')) {
+		return false;
+	}
+
+	// Less Parametric mixins (e.g. .mixin(@variable: x) {})
+	if (/\(@.*\)$/.test(selector)) {
+		return false;
+	}
+
+	// ERB template tags
+	if (selector.includes('<%') || selector.includes('%>')) {
+		return false;
+	}
+
+	//  SCSS and Less comments
+	if (selector.includes('//')) {
+		return false;
+	}
+
+	return true;
+}