How fetch data React Native?

In React Native, you can request data from an API over the network using the fetch() method . We are creating a function called getUsers, where we will fetch json data from rest api. We want to fetch the data as soon as the component mounts, so calling getUsers function in useEffect hook.

First, we specify the ‘method’, POST. Then, we specify the value of ‘mode’. Since the Flask server is being hosted on a different port on our machine (8080) than the React app, we have to specify the value as ‘cors’. All this means is that data will be sent across origins.

We’ll cover the following options for fetching data in React Native:

First we’re passing the url of the service endpoint. Second we’re passing object params which we created above and lastly we will pass headers to the post request. To pass raw data body content-type should be application/json .

We can provide more parameters to send a POST request.

Steps to fetch data:

React Native provides the Fetch API for your networking needs . Fetch will seem familiar if you have used XMLHttpRequest or other networking APIs before. You may refer to MDN’s guide on Using Fetch for additional information.19 Oca 2022