| 1 | var utils = require('../utils');
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| 2 |
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| 3 | /**
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| 4 | * Returns true if the given selector exists.
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| 5 | *
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| 6 | * @param {String} sel
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| 7 | * @return {Boolean}
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| 8 | * @api public
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| 9 | */
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| 10 |
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| 11 | function selectorExists(sel) {
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| 12 | utils.assertString(sel, 'selector');
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| 13 |
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| 14 | if (!this.__selectorsMap__) {
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| 15 | var Normalizer = require('../visitor/normalizer')
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| 16 | , visitor = new Normalizer(this.root.clone());
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| 17 | visitor.visit(visitor.root);
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| 18 |
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| 19 | this.__selectorsMap__ = visitor.map;
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| 20 | }
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| 21 |
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| 22 | return sel.string in this.__selectorsMap__;
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| 23 | }
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| 24 | selectorExists.params = ['sel'];
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| 25 | module.exports = selectorExists;
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