> For the complete documentation index, see [llms.txt](https://docs.elentra.org/ejs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.elentra.org/ejs/1.3/guide/architecture/web-apis.md).

# Web APIs

[**Fetch API**](https://developer.mozilla.org/en/docs/Web/API/Fetch_API)\
The Fetch API is a replacement for legacy XHR requests. All programmatic requests from EntradaJS are handled using this API, including file loading and API requests.

[**History API**](https://developer.mozilla.org/en-US/docs/Web/API/History)\
The History API is used to manipulate the browser's address bar without adding history entries. This ensures that the back/forward buttons behave as expected.

[**Promises**](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Promise)\
Promises are used heavily for asynchronous processing and error handling.

[**Reflect API**](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Reflect)\
The Reflect API is used for programmatic instantiation.

[**Symbols**](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Symbol)\
The new Symbol primitive type is used to avoid namespace collisions without imposing additional filtering requirements on developers.