Last change
on this file since 76712b2 was 6a3a178, checked in by Ema <ema_spirova@…>, 3 years ago |
initial commit
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File size:
555 bytes
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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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