31 lines
661 B
JavaScript
Vendored
31 lines
661 B
JavaScript
Vendored
var Token = require('../../tokenizer/token');
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var serializeAll = require('../../writer/one-time').all;
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var serializeRules = require('../../writer/one-time').rules;
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function removeDuplicateMediaQueries(tokens) {
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var candidates = {};
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var candidate;
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var token;
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var key;
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var i, l;
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for (i = 0, l = tokens.length; i < l; i++) {
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token = tokens[i];
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if (token[0] != Token.NESTED_BLOCK) {
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continue;
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}
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key = serializeRules(token[1]) + '%' + serializeAll(token[2]);
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candidate = candidates[key];
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if (candidate) {
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candidate[2] = [];
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}
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candidates[key] = token;
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}
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}
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module.exports = removeDuplicateMediaQueries;
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