Read the full story https://www.w3.org/blog/news/archives/6562

The Web Performance Working Group has published a Proposed Recommendation of Page Visibility Level 2. This specification defines a means to programmatically determine the visibility state of a document. This can aid in the development of resource efficient web applications. Page Visibility Level 2 replaces the first version of Page Visibility and includes a few Processing and IDL clarifications, as well as some new features. Comments are welcome through 14 November 2017.

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