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redux-modular-fetch-middleware
Advanced tools
A modular redux middleware for using fetch
redux-modular-fetch-middleware
using npm i redux-modular-fetch-middleware
or yarn add redux-modular-fetch-middleware
redux-modular-fetch-middleware
default export, like so...import { createStore, applyMiddleware } from 'redux'
import fetchMiddleware from 'redux-modular-fetch-middleware';
...
applyMiddleware(fetchMiddleware);
fetch
object with a url
property on the dispatch you want to call fetchconst actionCreatorMethod = () => ({
fetch: {
url: 'https://someurl.com'
},
type: SOME_ACTION_TYPE
});
That's it! A fetch
object with a url
property is all you need to call fetch on an action.
fetch
The required object on a dispatch call to call fetchurl
The url that will be called by fetchYou can define what the request method
, body
, and header
look like. In fact, any options that you can define in fetch natively will be passed on just as if you were calling fetch yourself. By default GET
is used for as the method
.
options
Fetch options with properties like method
, header
, and body
const setUserActionCreator = () => ({
fetch: {
options: {
body: {
user: {
name: 'First Last',
address: '123 Main St.'
}
},
method: 'POST'
},
url: 'https://someapi.com/user'
},
type: SET_USER_REQUEST
});
If you're retrieving data, you can define what response method will be used to retrieve that data.
responseMethod
The response method used to retrieve data. By default, json
will be used as the response method if the header
content-type is 'application/json'. Warning: If a responseMethod
is provided and your fetch call returns a response that is not resolvable by the responseMethod
provided, the Promise will be rejected.const getProfilePicActionCreator = (userId) => ({
fetch: {
responseMethod: 'blob',
url: `https://someapi.com/user/${userId}/profilePic`
},
type: GET_PROFILE_PIC_REQUEST
});
Being able to call fetch without being able to access the data or error isn't very useful. Those options are provided through the properties shown below.
onFailure
The function that will be called if the fetch request fails. Called with dispatch
, getState
, and error
onSuccess
The function that will be called if the fetch request succeeds. Called with dispatch
, getState
, and data
You are also given the store
's current getState
and dispatch
function to notify your reducers your request was successful or unsuccessful.
const getProfilePicActionCreator = (userId) => ({
fetch: {
onFailure: (dispatch, getState, error) => {
dispatch({
error: error,
type: GET_PROFILE_PIC_FAILURE
});
},
onSuccess: (dispatch, getState, data) => {
dispatch({
data: data,
type: GET_PROFILE_PIC_SUCCESS
});
},
responseMethod: 'blob',
url: `https://someapi.com/user/${userId}/profilePic`
},
type: GET_PROFILE_PIC_REQUEST
});
You can even define what fetch implementation you would like the middleware to use when applying the middleware.
import crossFetch from 'cross-fetch';
import fetchMiddleware from 'redux-modular-fetch-middleware';
...
applyMiddleware(fetchMiddleware(crossFetch));
This can be especially useful when wanting to set global options in your fetch request like header
and credentials
. By default, window.fetch
will be used as the fetch implementation.
Required Object
fetch
The required object on a dispatch call to call fetchRequired Properties on fetch
Object
url
The url that will be called by fetchOptional Properties on fetch
Object
onFailure
The function that will be called if the fetch request fails. Called with dispatch
, getState
, and error
onSuccess
The function that will be called if the fetch request succeeds. Called with dispatch
, getState
, and data
options
Fetch options with properties like method
, header
, and body
. By default, GET
will be used as the request methodresponseMethod
The response method used to retrieve data. By default, json
will be used as the response method if the header
content-type is 'application/json'. Warning: If a responseMethod
is provided and your fetch call returns a response that is not resolvable by the responseMethod
provided, the Promise will be rejected.
Fetch Implementation
The fetch implementation can be defined by passing it in as the parameter when applying the middleware. By default, window.fetch
will be used as the fetch implementation.
Async Actions
Redux docs suggest using three actions for an asynchronous request: an action indicating your request began, an action indicating your request succeeded, and an action indicating your request failed. Below is an example of how to heed this suggestion using redux-modular-fetch-middleware
.
const getUserActionCreator = (userId) => ({
fetch: {
onFailure: (dispatch, getState, error) => {
dispatch({
error: error,
type: GET_USER_FAILURE
});
},
onSuccess: (dispatch, getState, data) => {
dispatch({
data: data,
type: GET_USER_SUCCESS
});
},
url: `https://someapi.com/user/${userId}`
},
type: GET_USER_REQUEST
});
FAQs
A modular redux middleware for using fetch
The npm package redux-modular-fetch-middleware receives a total of 1 weekly downloads. As such, redux-modular-fetch-middleware popularity was classified as not popular.
We found that redux-modular-fetch-middleware demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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