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- 'use strict';
- Object.defineProperty(exports, "__esModule", {
- value: true
- });
- var _postcss = require('postcss');
- var _postcss2 = _interopRequireDefault(_postcss);
- function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
- var OVERRIDABLE_RULES = ['keyframes', 'counter-style'];
- var SCOPE_RULES = ['media', 'supports'];
- function isOverridable(name) {
- return OVERRIDABLE_RULES.indexOf(_postcss2.default.vendor.unprefixed(name)) !== -1;
- }
- function isScope(name) {
- return SCOPE_RULES.indexOf(_postcss2.default.vendor.unprefixed(name)) !== -1;
- }
- function getScope(node) {
- var current = node.parent;
- var chain = [node.name, node.params];
- do {
- if (current.type === 'atrule' && isScope(current.name)) {
- chain.unshift(current.name + ' ' + current.params);
- }
- current = current.parent;
- } while (current);
- return chain.join('|');
- }
- exports.default = _postcss2.default.plugin('postcss-discard-overridden', function () {
- return function (css) {
- var cache = {};
- var rules = [];
- css.walkAtRules(function (rule) {
- if (rule.type === 'atrule' && isOverridable(rule.name)) {
- var scope = getScope(rule);
- cache[scope] = rule;
- rules.push({
- node: rule,
- scope: scope
- });
- }
- });
- rules.forEach(function (rule) {
- if (cache[rule.scope] !== rule.node) {
- rule.node.remove();
- }
- });
- };
- });
- module.exports = exports['default'];
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