Fetch API for GET requests in React Native - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is the Fetch API used for in React Native?

The Fetch API is used to make network requests, such as getting data from a server, in React Native apps.

beginner

How do you specify a GET request using Fetch API?

By default, Fetch makes a GET request if no method is specified, so you can simply call fetch(url) to perform a GET request.

intermediate

What does the fetch() function return?

fetch() returns a Promise that resolves to a Response object representing the server's response.

intermediate

How do you convert the response from fetch() to JSON?

You call the .json() method on the Response object, which returns a Promise that resolves to the parsed JSON data.

beginner

Why should you handle errors when using fetch()?

Because network requests can fail due to no internet, server errors, or bad URLs, handling errors prevents app crashes and improves user experience.

What is the default HTTP method used by fetch() if none is specified?

A POST

B PUT

C GET

D DELETE

fetch() uses GET by default to retrieve data from the server.

Which method converts the fetch response to JSON?

A toJSON()

B json()

C parse()

D convert()

The json() method parses the response body as JSON.

What does fetch() return?

A A Promise

B An error

C A JSON object

D A Response object

fetch() returns a Promise that resolves to a Response object.

Why is it important to handle errors when using fetch()?

A To prevent app crashes and handle network issues

B To speed up the request

C To improve app performance

D To change the request method

Handling errors helps manage network failures and keeps the app stable.

How do you make a GET request with fetch()?

A fetch(url, { method: 'DELETE' })

B fetch(url, { method: 'POST' })

C fetch(url, { method: 'PUT' })

D fetch(url)

Simply calling fetch(url) makes a GET request by default.

Explain how to use the Fetch API to get data from a server in React Native.

Think about calling fetch, then using .then() to get JSON, and catching errors.

Describe why error handling is important when making GET requests with fetch.

Consider what happens if the internet is off or the server is down.