redux-async-await-action-middleware
v0.0.1
Published
Redux middleware to enable async/await action creators
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redux-async-await-action-middleware
Redux middleware to enable async/await action creators
Motivation
Use async/await to make Redux as elegant to use with async flows as it is with synchronous, without the learning/complexity overhead of redux-saga or redux-observable etc.
Usage
Include the middleware
import { createStore } from 'redux';
import createAsyncAwaitActionMiddleware from 'redux-async-await-action-middleware';
const store = createStore([
createAsyncAwaitActionMiddleware()
]);
Basic async action creator
export async function loadData() {
try {
const response = await fetch('...');
const data = await response.json();
// Action can be any kind, not just FSA
return {
type: 'LOAD_DATA',
payload: data
}
} catch (error) {
return {
type: 'LOAD_DATA',
payload: error,
isError: true
}
}
}
...
dispatch(loadData());
A more complete async action creator
import { createAction } from 'redux-actions';
const LOAD_DATA = 'LOAD_DATA';
const NO_DATA_AVAILABLE = 'NO_DATA_AVAILABLE';
const AUTH_FAILED = 'AUTH_FAILED';
const errorHandlers = {
404: createAction(NO_DATA_AVAILABLE),
403: createAction(AUTH_FAILED)
}
export async function loadData() {
try {
const response = await fetch('...');
if (response.statusCode !== 200) {
const handler = errorHandlers[response.statusCode];
if (handler) {
return handler();
}
throw new Error(`Unexpected Response: ${response.statusCode}:${response.status}`);
}
const data = await response.json();
return createAction(LOAD_DATA)(data);
} catch (error) {
return createAction(LOAD_DATA)(error);
}
}
...
dispatch(loadData());
Use with an in-progress action
import { createAction } from 'redux-actions';
import store from '../myStore';
const LOAD_DATA = 'LOAD_DATA';
const LOAD_DATA_IN_PROGRESS = 'LOAD_DATA_IN_PROGRESS';
const dispatch = store.dispatch;
export async function loadData() {
try {
dispatch(createAction(LOAD_DATA_IN_PROGRESS)());
const response = await fetch('...');
const data = await response.json();
return createAction(LOAD_DATA)(data);
} catch (error) {
return createAction(LOAD_DATA)(error);
}
}
...
dispatch(loadData());
Cancel an async action
import { createAction } from 'redux-actions';
const LOAD_DATA = 'LOAD_DATA';
const CANCEL_LOAD_DATA = 'CANCEL_LOAD_DATA';
export async function loadData() {
try {
const response = await fetch('...');
const data = await response.json();
return createAction(LOAD_DATA)(data);
} catch (error) {
return createAction(LOAD_DATA)(error);
}
}
...
dispatch(loadData());
...
dispatch(createAction(CANCEL_LOAD_DATA));
Install
npm i redux-async-await-action-middleware
Test
npm i
npm test