How to Detect If a User Is Viewing Your Web App | Page Visibility API in JavaScript
With the Page Visibility API your web application can know whether a user is viewing your page or not. This opens the door for some interesting user experiences.
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The Page Visibility API is a small but powerful set of visibility states for the window's document object that can enable applications to optimize performance in the browser. This makes for a smoother browsing experience for users.
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I'm Ijemma, a frontend software engineer currently working in New York City. I make videos on all things JavaScript and, more broadly, frontend web development.