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. Each serves a critical role in handling network communication and background processing, enabling websites and progressive web apps (PWAs) to be faster, more reliable, and interactive.
Fetch API: Modern Network Requests
The Fetch API is the modern, promise-based interface to perform network requests such as HTTP GET, POST, PUT, DELETE, and more. It replaces the older XMLHttpRequest with a more powerful and cleaner approach based on Promises.
How Fetch API Works
You call fetch()with a URL and optional options like method, headers, and body.
