30 lines
523 B
JavaScript
30 lines
523 B
JavaScript
'use strict';
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const { isAtRule, isRule } = require('./typeGuards');
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/**
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* Find the at-rule in which a rule is nested.
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*
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* Returns `null` if the rule is not nested within an at-rule.
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*
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* @param {import('postcss').Rule} rule
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* @returns {null | import('postcss').AtRule}
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*/
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module.exports = function findAtRuleContext(rule) {
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const parent = rule.parent;
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if (!parent) {
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return null;
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}
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if (isAtRule(parent)) {
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return parent;
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}
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if (isRule(parent)) {
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return findAtRuleContext(parent);
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}
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return null;
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};
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