abort fetch api requests using abortcontroller

tutorial: aborting fetch api requests using abortcontroller

the fetch api is a modern way to make network requests in javascript. sometimes, you may need to abort a request due to various reasons, such as user navigation or cancelling a long-running request. this is where the `abortcontroller` comes in handy.

what is abortcontroller?

`abortcontroller` is a built-in javascript object that allows you to abort one or more dom requests (like fetch) as and when required. it provides a way to signal that an operation should be aborted.

how does it work?

1. create an instance of `abortcontroller`.
2. use its `signal` property to associate it with your fetch request.
3. call the `abort()` method on the controller instance when you want to cancel the request.

example code

here's a simple example to illustrate how to use `abortcontroller` to abort a fetch request.

```javascript
// create an instance of abortcontroller
const controller = new abortcontroller();

// function to fetch data
async function fetchdata(url) {
try {
const response = await fetch(url, { signal }); // attach the signal to the fetch request
throw new error('network response was not ok');
}
} catch (error) {
} else {
}
}
}

// start the fetch request

// simulating an abort after 2 seconds
settimeout(() = {
}, 2000);
```

explanation of the code

1. **controller creation**: we start by creating a new instance of `abortcontroller`.

2. **fetch request**: we define an `async` function `fetchdata` that takes a url as an argument. inside this function, we call ` ...

#AbortFetch #AbortController #windows
AbortController
Fetch API
Abort fetch request
JavaScript abort request
Cancel fetch request
Async request cancellation
Abort signal
Network request control
Fetch cancellation
AbortController usage
Asynchronous operations
API request management
Fetch timeout
User-initiated cancellation
Abort promise