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backend/node_modules/stylehacks/src/exists.js

@@ -0,0 +1,13 @@
+'use strict';
+
+/**
+ * @param {import('postcss-selector-parser').Selector} selector
+ * @param {number} index
+ * @param {string} value
+ * @return {boolean | undefined | ''}
+ */
+module.exports = function exists(selector, index, value) {
+  const node = selector.at(index);
+
+  return node && node.value && node.value.toLowerCase() === value;
+};