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- if ("hidden" in document && "visibilityState" in document) {
- document.addEventListener("visibilitychange", onVisibilityChange);
- onVisibilityChange();
- } else {
- console.log("This browser doesn't support Page Visibility API");
- }
- function onVisibilityChange() {
- console.log("This page is " + document.hidden ? "hidden" : "visible");
- }
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