Returns true if the page is in a state considered to be hidden to the user, and false otherwise.
Returns true if the page is in a state considered to be hidden to the user, and false otherwise.
MDN
Is a string denoting the visibility state of the document.
Is a string denoting the visibility state of the document.
Note: or a vendor prefixed DOMString as defined in 4.5 Vendor Prefixes
MDN
The visibilitychange event is fired when the content of a tab has become visible or has been hidden.
The visibilitychange event is fired when the content of a tab has become visible or has been hidden.
MDN
The Page Visibility API lets you know when a webpage is visible or in focus. With tabbed browsing, there is a reasonable chance that any given webpage is in the background and thus not visible to the user. When the user minimizes the webpage or moves to another tab, the API sends a visibilitychange event regarding the visibility of the page. You can detect the event and perform some actions or behave differently. For example, if your web app is playing a video, it would pause the moment the user looks at another browser, and plays again when the user returns to the tab. The user does not lose their place in the video and can continue watching.
MDN
Page Visibility (Second Edition) W3C Recommendation 29 October 2013