jiapengyu
19 lines
436 B
JavaScript
19 lines
436 B
JavaScript
var Emitter = require('./Emitter');
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var MediaQuery = require('./MediaQuery');
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var m = new MediaQuery('(resolution: '.concat(get(), 'dppx)'));
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exports = {
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get: get
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};
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Emitter.mixin(exports);
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function get() {
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return window.devicePixelRatio || 1;
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}
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function change() {
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var dpr = get();
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m.setQuery('(resolution: '.concat(dpr, 'dppx)'));
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exports.emit('change', dpr);
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}
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m.on('unmatch', change);
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module.exports = exports;
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