how to use swr in react native fetch and cache data tutorial

swr (stale-while-revalidate) is a react hooks library for data fetching that provides a simple api for managing remote data fetching, caching, and revalidation. it makes it easy to handle data synchronization and keeps your ui responsive and up-to-date. in this tutorial, we will cover how to use swr in a react native application to fetch and cache data.

prerequisites

- basic knowledge of react and react native.

step 1: setting up your react native project

1. **create a new react native project** (if you haven't already):



2. **install swr**:

run the following command to install swr and axios (for making http requests):



step 2: create a fetcher function

step 3: using swr in your component

now, let's create a component that will fetch and display data using swr.

step 4: running your application

now that you have set up your swr component, you can run your application:

or

explanation of the code

1. **fetcher function**: the fetcher function uses axios to make a get request to the provided url and returns the response data.

2. **useswr hook**: the `useswr` hook takes two arguments:
- the key (in this case, the api url).
- the fetcher function that will be used to fetch the data.

3. **loading and error states**:
- if an error occurs during data fetching, we render an error message.
- if the data is still being fetched, we display a loading spinner (`activityindicator`).

4. **displaying data**: once the data is fetched successfully, we use a `flatlist` to display the list of posts.

conclusion

you've now set up a simple react native application using swr to fetch and cache data! swr handles caching and revalidation, making it easy to keep your ui consistent wit ...

#ReactNative #SWR #coding
swr react native fetch cache tutorial data fetching caching strategy client-side data management use swr react native hooks asynchronous data handling state management react query performance optimization data synchronization real-time data updates