Событие Tab Switch Browser JS
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script>
<script>
document.addEventListener("visibilitychange", (event) => {
if (document.visibilityState == "visible") {
alert("tab is active")
} else {
alert("tab is inactive")
}
});
</script>
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