Networking in React Native

Most mobile apps need to fetch and update data from an external URL. There are several npm modules, which can be used in React Native to communicate and download remote resources such as Axios or SuperAgent. If you are familiar with a specific HTTP library, you can use it in your React Native projects (as long as is not dependent on any browser specific APIs), although a safe and proficient option is to use Fetch, the built-in networking library in React Native. 

Fetch is very similar to XMLHttpRequest, so it will feel familiar to any web developers who had to perform AJAX requests from the browser. On top of that, Fetch supports promises and the ES2017 async/await syntax. 

The full documentation for the Fetch API can be found on Mozilla Developer Networks website https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API.