With the Mozilla Page Visibility API, users know when a page is in focus, considering tabbed browsing. The aim of the API in this case, is to send a visibilitychange event to improve user experience. To illustrate, when a web application plays a video, the page will automatically stand by until the user returns to the tab.
The following is a list of sample source code snippets that matched your search term. Source code snippets are chunks of source code that were found out on the Web that you can cut and paste into your own source code. Whereas most of the sample source code we've curated for our directory is for consuming APIs, we occasionally find something interesting on the API provider side of things. If you know of some sample source code that would be of interest to the ProgrammableWeb community, we'd like to know about it. Be sure to check our guidelines for making contributions to ProgrammableWeb.