25 lines
666 B
JavaScript
25 lines
666 B
JavaScript
var Emitter = require('./Emitter');
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exports = Emitter.extend({
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className: 'MediaQuery',
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initialize: function(query) {
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var _this = this;
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this.callSuper(Emitter, 'initialize');
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this._listener = function() {
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_this.emit(_this.isMatch() ? 'match' : 'unmatch');
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};
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this.setQuery(query);
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},
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setQuery: function(query) {
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if (this._mql) {
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this._mql.removeListener(this._listener);
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}
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this._mql = window.matchMedia(query);
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this._mql.addListener(this._listener);
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},
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isMatch: function() {
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return this._mql.matches;
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}
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});
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module.exports = exports;
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