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mhmda-83/visibilitychange event.js

Created April 7, 2020 11:27
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check how much time user spend out of website
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visibilitychange event.js
let timer = 0;
let interval;
document.addEventListener('visibilitychange', () => {
if (document.visibilityState === 'visible') {
alert(timer);
clearInterval(interval);
timer = 0;
} else {
interval = setInterval(() => timer++, 1000);
}
});
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