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 SDKs from our SDK directory that matched your search term. Though your definition of an SDK may differ, in our world, we define SDKs as platform- specific tools for consuming existing APIs of the sort we list in our API directory. For example, the Ruby SDK for consuming the Twitter Ads API. If you think an SDK, API, or other asset is missing from our directory, be sure to check our guidelines for making contributions to ProgrammableWeb.