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node_modules/stylelint/lib/utils/isValidFontSize.mjs

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+import valueParser from 'postcss-value-parser';
+
+import { fontSizeKeywords } from '../reference/keywords.mjs';
+import { lengthUnits } from '../reference/units.mjs';
+
+/**
+ * Check if a word is a font-size value.
+ *
+ * @param {string} word
+ * @returns {boolean}
+ */
+export default function isValidFontSize(word) {
+	if (!word) {
+		return false;
+	}
+
+	if (fontSizeKeywords.has(word)) {
+		return true;
+	}
+
+	const numberUnit = valueParser.unit(word);
+
+	if (!numberUnit) {
+		return false;
+	}
+
+	const unit = numberUnit.unit;
+
+	if (unit === '%') {
+		return true;
+	}
+
+	if (lengthUnits.has(unit.toLowerCase())) {
+		return true;
+	}
+
+	return false;
+}