What is the Fetch API, and how does it differ from traditional XMLHttpRequest?
How do you make a basic GET request using the Fetch API?
What are the different components of a Fetch request object?
When you make a Fetch request, there are different things you need to include. These include the website address you want to get information from (called the request URL), the way you want to get the information (like saying “please” politely or asking a specific question), any extra information you want to provide (like specifying your preferences), any data you want to send (like telling the website your name), how you want the request to be handled (like asking for a fresh response every time), how the response should be stored (like saving it for later), and more. These different parts help you customize your requests so that they work the way you want them to.
How can you handle errors and network failures when using the Fetch API?
The Fetch API has a built-in feature to deal with errors and network problems. If something goes wrong with the network or the server sends back an error message, the fetch() function will give you a special kind of message called a “Promise” that says something didn’t work out. You can use the .catch() method or a try/catch block to handle these error messages and come up with a backup plan or alternative solution.
What are the advantages of using the Fetch API over other AJAX methods?
The Fetch API is better than other ways of making requests, like XMLHttpRequest, for several reasons. It has a newer and easier way of writing code, so it’s more understandable. It also uses something called Promises to handle errors and manage requests more effectively. With Fetch, sending, and receiving data is simpler. You can also have more control over how your requests work by using options. Additionally, Fetch supports streaming data and canceling requests, which can be really helpful.
Can you explain the concept of Promises in relation to the Fetch API?
How can you send data in a POST request using the Fetch API?
Are there any cross-origin considerations when using the Fetch API?
What are the different options you can set when making a Fetch request, and how do they affect the behavior?
Can you demonstrate how to send headers and cookies in a Fetch request?
When you send a request using the Fetch API, you can include additional information called headers. Headers can be used to send things like authorization tokens or cookies.
To send headers in a Fetch request, you need to include the headers property in the request object. Here’s an example:
In this example, we’re setting a custom header called “Authorization” and providing a token value. You can replace `YOUR_TOKEN` with the actual token you want to use.
Now, let’s talk about sending cookies. By default, Fetch requests do not include cookies. However, if you want to send cookies along with the request, you need to set the `credentials` option to `’include’`. Here’s how you can do it:
By setting `credentials` to `’include’`, the Fetch request will include any cookies that are associated with the server you’re making the request to.