The visibilitychange event is fired at the document when the contents of its tab have become visible or have been hidden.| MDN Web Docs
The read-only sessionStorage property accesses a session Storage object for the current origin. sessionStorage is similar to localStorage; the difference is that while data in localStorage doesn't expire, data in sessionStorage is cleared when the page session ends.| MDN Web Docs
Connect with customers on their preferred channels—anywhere in the world. Quickly integrate powerful communication APIs to start building solutions for SMS and WhatsApp messaging, voice, and email.| Twilio
Amazon S3 is cloud object storage with industry-leading scalability, data availability, security, and performance. S3 is ideal for data lakes, mobile applications, backup and restore, archival, IoT devices, ML, AI, and analytics.| Amazon Web Services, Inc.
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