ce4c83ff
 wxy
初始提交
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var utils = require('../utils');
/**
* Returns true if the given selector exists.
*
* @param {String} sel
* @return {Boolean}
* @api public
*/
module.exports = function selectorExists(sel) {
utils.assertString(sel, 'selector');
if (!this.__selectorsMap__) {
var Normalizer = require('../visitor/normalizer')
, visitor = new Normalizer(this.root.clone());
visitor.visit(visitor.root);
this.__selectorsMap__ = visitor.map;
}
return sel.string in this.__selectorsMap__;
};
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