Fetching data in React Native

React Native gives us HTML5 Fetch API for networking needs. In order to fetch content, we will use it in the following way:

fetch('https://myserver.com/api/data.json')

Fetch will return us a promise, so we can use it both using Promise.then or async/await, which is supported out of the box inside React Native.

Fetch can be configured with a second parameter, as in the following example:

fetch('https://myserver.com/endpoint/', {
   method: 'POST',
   headers: {
       'Accept': 'application/json',
      'Content-Type': 'application/json',
   },
   body: JSON.stringify({
     firstParam: 'yourValue',
     secondParam: 'yourOtherValue',
    })
 })

The important thing is that fetch response is a blob containing metadata on response itself, but not the actual data; so, in order...