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Understanding Key Web APIs: Fetch API, WebSockets, and Service Workers

Modern web applications rely heavily on APIs provided by browsers to enable rich interactive experiences. Among the most foundational are the Fetch API, WebSockets, and Service Workers.

  • Fetch API simplifies network requests with promise-based interface
  • WebSockets enable persistent, full-duplex communication for real-time apps
  • Service Workers power offline caching and background tasks in PWAs

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