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node_modules/stylelint/lib/rules/length-zero-no-unit/index.mjs

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+import valueParser from 'postcss-value-parser';
+
+import { atRuleParamIndex, declarationValueIndex } from '../../utils/nodeFieldIndices.mjs';
+import { isValueFunction as isFunction, isValueWord as isWord } from '../../utils/typeGuards.mjs';
+import { isRegExp, isString } from '../../utils/validateTypes.mjs';
+import getAtRuleParams from '../../utils/getAtRuleParams.mjs';
+import getDeclarationValue from '../../utils/getDeclarationValue.mjs';
+import isCustomProperty from '../../utils/isCustomProperty.mjs';
+import isMathFunction from '../../utils/isMathFunction.mjs';
+import isStandardSyntaxAtRule from '../../utils/isStandardSyntaxAtRule.mjs';
+import isStandardSyntaxDeclaration from '../../utils/isStandardSyntaxDeclaration.mjs';
+import { lengthUnits } from '../../reference/units.mjs';
+import optionsMatches from '../../utils/optionsMatches.mjs';
+import report from '../../utils/report.mjs';
+import ruleMessages from '../../utils/ruleMessages.mjs';
+import setAtRuleParams from '../../utils/setAtRuleParams.mjs';
+import setDeclarationValue from '../../utils/setDeclarationValue.mjs';
+import validateOptions from '../../utils/validateOptions.mjs';
+
+const ruleName = 'length-zero-no-unit';
+
+const messages = ruleMessages(ruleName, {
+	rejected: 'Unexpected unit',
+});
+
+const meta = {
+	url: 'https://stylelint.io/user-guide/rules/length-zero-no-unit',
+	fixable: true,
+};
+
+/** @import { AtRule, Declaration } from 'postcss' */
+/** @import { ParsedValue, Node } from 'postcss-value-parser' */
+
+/** @type {import('stylelint').CoreRules[ruleName]} */
+const rule = (primary, secondaryOptions) => {
+	return (root, result) => {
+		const validOptions = validateOptions(
+			result,
+			ruleName,
+			{
+				actual: primary,
+			},
+			{
+				actual: secondaryOptions,
+				possible: {
+					ignore: ['custom-properties'],
+					ignoreFunctions: [isString, isRegExp],
+				},
+				optional: true,
+			},
+		);
+
+		if (!validOptions) return;
+
+		/**
+		 * @param {AtRule | Declaration} node
+		 * @param {number} nodeIndex
+		 * @param {Node} valueNode
+		 * @param {ParsedValue} parsedValue
+		 */
+		function check(node, nodeIndex, valueNode, parsedValue) {
+			const { value, sourceIndex } = valueNode;
+
+			if (isMathFunction(valueNode)) return false;
+
+			if (isFunction(valueNode) && optionsMatches(secondaryOptions, 'ignoreFunctions', value))
+				return false;
+
+			if (!isWord(valueNode)) return;
+
+			const dimension = valueParser.unit(value);
+			const decompositionFailed = dimension === false;
+
+			if (decompositionFailed) return;
+
+			const { number, unit } = dimension;
+
+			if (!isZero(number)) return;
+
+			if (isNumber(unit)) return;
+
+			if (!isLength(unit)) return;
+
+			if (isFraction(unit)) return;
+
+			const fix = () => {
+				valueNode.value = number.startsWith('.') ? number.slice(1) : number;
+
+				switch (node.type) {
+					case 'atrule':
+						setAtRuleParams(node, parsedValue.toString());
+						break;
+					case 'decl':
+						setDeclarationValue(node, parsedValue.toString());
+						break;
+				}
+			};
+
+			const index = nodeIndex + sourceIndex + number.length;
+			const endIndex = index + unit.length;
+
+			report({
+				index,
+				endIndex,
+				message: messages.rejected,
+				node,
+				result,
+				ruleName,
+				fix,
+			});
+		}
+
+		/** @param {AtRule} node */
+		function checkAtRule(node) {
+			if (!isStandardSyntaxAtRule(node)) return;
+
+			const index = atRuleParamIndex(node);
+			const parsedValue = valueParser(getAtRuleParams(node));
+
+			parsedValue.walk((valueNode) => check(node, index, valueNode, parsedValue));
+		}
+
+		/** @param {Declaration} node */
+		function checkDecl(node) {
+			const { prop } = node;
+
+			if (!isStandardSyntaxDeclaration(node)) return;
+
+			if (isLineHeight(prop)) return;
+
+			if (isFlex(prop)) return;
+
+			if (optionsMatches(secondaryOptions, 'ignore', 'custom-properties') && isCustomProperty(prop))
+				return;
+
+			const index = declarationValueIndex(node);
+			const parsedValue = valueParser(getDeclarationValue(node));
+
+			parsedValue.walk((valueNode, valueNodeIndex, valueNodes) => {
+				if (isLineHeightValue(node, valueNodes, valueNodeIndex)) return;
+
+				return check(node, index, valueNode, parsedValue);
+			});
+		}
+
+		root.walkAtRules(checkAtRule);
+		root.walkDecls(checkDecl);
+	};
+};
+
+/**
+ * @param {Declaration} decl
+ * @param {Node[]} nodes
+ * @param {number} index
+ */
+function isLineHeightValue({ prop }, nodes, index) {
+	const lastNode = nodes[index - 1];
+
+	return (
+		prop.toLowerCase() === 'font' && lastNode && lastNode.type === 'div' && lastNode.value === '/'
+	);
+}
+
+/**
+ * @param {string} prop
+ */
+function isLineHeight(prop) {
+	return prop.toLowerCase() === 'line-height';
+}
+
+/**
+ * @param {string} prop
+ */
+function isFlex(prop) {
+	return prop.toLowerCase() === 'flex';
+}
+
+/**
+ * @param {string} unit
+ */
+function isLength(unit) {
+	return lengthUnits.has(unit.toLowerCase());
+}
+
+/**
+ * @param {string} unit
+ */
+function isFraction(unit) {
+	return unit.toLowerCase() === 'fr';
+}
+
+/**
+ * @param {string} number
+ */
+function isZero(number) {
+	return Number.parseFloat(number) === 0;
+}
+
+/**
+ * @param {string} unit
+ */
+function isNumber(unit) {
+	return unit === '';
+}
+
+rule.ruleName = ruleName;
+rule.messages = messages;
+rule.meta = meta;
+export default rule;