Fetch API

The modern, Promise-based JavaScript interface for asynchronous network requests, replacing `XMLHttpRequest` with a cleaner, more flexible pipeline.

Fetch API provides the global `fetch()` method for resource retrieval: it returns a Promise resolving to a `Response` object. This is a significant upgrade from the older `XMLHttpRequest` model, offering native Promise integration for cleaner async/await syntax. It operates on core concepts: the `Request` and `Response` interfaces, plus the `Headers` object for control over HTTP headers. Use `fetch(url, options)` to handle requests, then chain `.json()` or `.text()` on the Response to extract data, ensuring you check `response.ok` for non-network HTTP error status codes (e.g., 404 or 500).

https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API