The W3C Visibility API allows a resource to request that a user agent guarantee to display its viewport in an unmodified manner and report on its success or failure in meeting this guarantee. Additionally, the API document defines a mechanism for requesting visibility protection and receiving notifications if events are delivered to a resource that is not meeting its visibility contract.
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18-10-16 13:42:05[Brief] Daily API RoundUp: Clearbit, Microsoft Parature, Reposify, JivoChat updated with Related API W3C Visibility