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- var mediaCheck = function(options) {
- var mq,
- matchMedia = window.matchMedia !== undefined;
- if (matchMedia) {
- mqChange = function(mq, options) {
- if (mq.matches) {
- options.entry();
- } else {
- options.exit();
- }
- };
- createListener = function(mqDetails) {
- mq = window.matchMedia(mqDetails.media);
- mq.addListener(function() {
- mqChange(mq, mqDetails);
- });
- mqChange(mq, mqDetails);
- };
- createListener(options);
- }
- };
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