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Discussion on: Cancel fetch requests, and a way to abstract it

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Replies for: Yes, just use new CustomPromise and pass the result of then into that new promise. This is the implementation of promise wrapper in my project (I ...

 
nombrekeff profile image
Keff •

Nice, yes I ended up solving it like this:

class CustomRequest {
    then(fn) {
        return new CustomRequest(
            this.promise.then(fn),
            this.abortController,
        );
    }

    catch(fn) {
        return new CustomRequest(
            this.promise.catch(fn),
            this.abortController,
        );
    }
}
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Though not complete, it does the job and could be improved as the needs arise.

Thanks again for pointing this out, I've made an edit in the post to explain to future readers.

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nombrekeff profile image
Keff •

The pattern is very similar to Monads (in fact some explanaions shows promises as example of modals) and Monad should never mutate the data.

Ohh cool, never thought of promises as monads, makes sense