request-state-monad v0.2.0

request-state-monad

example

function MyComponent(props) {
    return props.requestState
        .fetchingMap(() => <Loader />)
        .errorMap(error => <div>Error code: {error.code}</div>)
        .map(data => {
            return <div>
                <h1>We have data!</h1>
                <pre>{JSON.stringify(data)}</pre>
            </div>

        })
        .orValue()
}

api

Types (imports)

RequestState<value, fetching, error, success>;

RequestFetching(value: any): RequestState<V,true,false,false>
RequestError(value: any): RequestState<V,false,true,false>
RequestSuccess(value: any): RequestState<V,false,false,true>
RequestEmpty(): RequestState<V,false,false,false>

Methods

map(fn: any): RequestState

perform a map only on RequestSuccess

flatMap(fn: Function): any

perform a flatMap only on RequestSuccess

fetchingMap(fn: Function): RequestState

perform a map only on RequestFetching

fetchingFlatMap(fn: Function): RequestState

perform a map only on RequestFetching

errorMap(fn: Function): RequestState

perform a map only on RequestError

errorFlatMap(fn: Function): RequestState

perform a map only on RequestError

orValue(defaultValue: any): any

return the current value of the monad or defaultValue

toFetching(): RequestState

return a new RequestFetching with the current value.

toError(): RequestState

return a new RequestError with the current value.

toSuccess(): RequestState

return a new RequestSuccess with the current value.

toEmpty(): RequestState

return a new RequestEmpty with the current value.