{"id":17898,"library":"redux-api-middleware-fixed","title":"Redux API Middleware (Fixed Fork)","description":"redux-api-middleware-fixed is a Redux middleware designed for declarative API calls. It intercepts specific Redux Standard API-calling Actions (RSAAs), identified by a `[CALL_API]` property, and dispatches Flux Standard Actions (FSAs) during the request lifecycle (request, success, failure). This package is a community-maintained fork, currently at version 2.0.0, addressing outstanding pull requests and maintaining the original `redux-api-middleware` codebase. Its primary differentiator is providing a consistent, action-based pattern for managing API side effects within a Redux application, simplifying data fetching and error handling by abstracting away the boilerplate often associated with `fetch` or `axios` calls within Redux thunks or sagas. The release cadence appears infrequent, primarily driven by maintenance needs rather than active feature development.","status":"maintenance","version":"2.0.0","language":"javascript","source_language":"en","source_url":"https://github.com/olslash/redux-api-middleware","tags":["javascript","redux","api","middleware","redux-middleware","flux"],"install":[{"cmd":"npm install redux-api-middleware-fixed","lang":"bash","label":"npm"},{"cmd":"yarn add redux-api-middleware-fixed","lang":"bash","label":"yarn"},{"cmd":"pnpm add redux-api-middleware-fixed","lang":"bash","label":"pnpm"}],"dependencies":[{"reason":"Core dependency for Redux applications; provides `createStore`, `applyMiddleware`, etc.","package":"redux","optional":false}],"imports":[{"note":"This is the primary export for integrating the middleware with Redux.","wrong":"const apiMiddleware = require('redux-api-middleware-fixed').apiMiddleware;","symbol":"apiMiddleware","correct":"import { apiMiddleware } from 'redux-api-middleware-fixed';"},{"note":"Used as the key for defining API-calling actions. Historically a Symbol, recent versions (like this 'fixed' fork) may treat it as a string for broader compatibility or easier debugging.","wrong":"const CALL_API = require('redux-api-middleware-fixed').CALL_API;","symbol":"CALL_API","correct":"import { CALL_API } from 'redux-api-middleware-fixed';"},{"note":"Utility function to check if an action is a Redux Standard API-calling Action. Not commonly imported by consumers directly but useful for testing or custom logic.","wrong":"import isRSAA from 'redux-api-middleware-fixed/lib/isRSAA';","symbol":"isRSAA","correct":"import { isRSAA } from 'redux-api-middleware-fixed';"}],"quickstart":{"code":"import { createStore, applyMiddleware, combineReducers } from 'redux';\nimport { apiMiddleware, CALL_API } from 'redux-api-middleware-fixed';\n\n// A dummy reducer\nconst dataReducer = (state = { loading: false, users: [], error: null }, action) => {\n  switch (action.type) {\n    case 'FETCH_USERS_REQUEST':\n      return { ...state, loading: true, error: null };\n    case 'FETCH_USERS_SUCCESS':\n      return { ...state, loading: false, users: action.payload.users };\n    case 'FETCH_USERS_FAILURE':\n      return { ...state, loading: false, error: action.payload, users: [] };\n    default:\n      return state;\n  }\n};\n\nconst rootReducer = combineReducers({\n  data: dataReducer\n});\n\n// Configure the Redux store with apiMiddleware\nconst store = createStore(rootReducer, applyMiddleware(apiMiddleware));\n\n// Define an API call action\nconst fetchUsers = () => ({\n  [CALL_API]: {\n    endpoint: 'https://jsonplaceholder.typicode.com/users',\n    method: 'GET',\n    types: ['FETCH_USERS_REQUEST', 'FETCH_USERS_SUCCESS', 'FETCH_USERS_FAILURE']\n  }\n});\n\n// Dispatch the action\nstore.dispatch(fetchUsers());\n\n// You can subscribe to store changes to see the state updates\nconst unsubscribe = store.subscribe(() => {\n  console.log('Current state:', store.getState().data);\n});\n\n// In a real application, you'd typically handle errors and unmount subscriptions\n// setTimeout(() => unsubscribe(), 5000);\n","lang":"javascript","description":"Demonstrates setting up a Redux store with `redux-api-middleware-fixed` and dispatching a basic API call action to fetch users."},"warnings":[{"fix":"Ensure `CALL_API` is imported directly from the package and used as the action key. Avoid hardcoding 'CALL_API' as a string if expecting a Symbol, or vice-versa. Test thoroughly upon upgrade.","message":"The original `redux-api-middleware` used `Symbol('CALL_API')` as the action key. This 'fixed' fork, specifically around v1.2.0, introduced changes that might treat `CALL_API` as a string instead of a Symbol. While this can simplify serialization, it might break existing code relying on Symbol comparison or strict type checks if migrating from older versions of the original package.","severity":"breaking","affected_versions":">=1.2.0"},{"fix":"Evaluate active alternatives like `redux-thunk`, `redux-saga`, or `redux-observable` for new projects or if long-term support is critical. For existing projects using this, monitor its GitHub for activity.","message":"This package is a fork. While it aims to fix issues, it may not receive updates or new features at the same pace as actively maintained alternatives or the original project (if it were still maintained). Long-term maintenance and compatibility with future Redux versions are less certain.","severity":"gotcha","affected_versions":">=1.0.0"},{"fix":"Design reducers to specifically handle the `payload` and `error` properties of FSAs. For example, check `action.error` to determine if a failure action was dispatched and access the error object via `action.payload`.","message":"The middleware dispatches Flux Standard Actions (FSAs). Ensure your reducers are designed to handle actions with `type`, `payload`, and `error` properties as defined by the FSA specification. Non-FSA compliant actions might lead to unexpected behavior in reducers.","severity":"gotcha","affected_versions":">=1.0.0"},{"fix":"Implement explicit error handling in reducers for failure actions. Access `action.payload` to get the `ApiError` object, which typically contains `status` and `response` properties for detailed error information. Display appropriate user messages based on these details.","message":"Error handling for API calls defaults to an `ApiError` object in the `payload` when `error: true` is set. If not handled correctly, UI might not display meaningful error messages or application state might not reflect the error condition.","severity":"gotcha","affected_versions":">=1.0.0"}],"env_vars":null,"last_verified":"2026-04-23T00:00:00.000Z","next_check":"2026-07-22T00:00:00.000Z","problems":[{"fix":"Ensure you are importing `CALL_API` directly from `redux-api-middleware-fixed` and using it as the action key without attempting to cast it as a Symbol if it's not. For example, `[CALL_API]: { ... }` is correct.","cause":"Attempting to use `CALL_API` as a Symbol in an environment or version of the middleware where it's treated as a string, or vice-versa, often due to migration or incorrect import.","error":"TypeError: 'CALL_API' is not a symbol"},{"fix":"Verify that `applyMiddleware(apiMiddleware)` is correctly set up in your Redux store configuration. Also, double-check that your dispatched action includes `[CALL_API]` as a property, and that the object assigned to `[CALL_API]` has `endpoint`, `method`, and `types` properties.","cause":"This error typically indicates that `redux-api-middleware-fixed` was not correctly applied as a middleware, or that the action dispatched was not a valid RSAA (missing `[CALL_API]` or required properties within it).","error":"Error: Middleware argument must be a function. Expected an object with a 'type' property."},{"fix":"Check the network tab in browser developer tools for details on the failed request. Common causes include incorrect endpoint URL, network connectivity issues, or missing/misconfigured CORS headers on the API server. Ensure the API endpoint is accessible and correctly configured.","cause":"The browser's `fetch` API encountered a network error or a CORS issue, and the middleware's internal `fetch` call did not complete successfully.","error":"Unhandled Rejection (TypeError): Failed to fetch"}],"ecosystem":"npm","meta_description":null,"install_score":null,"install_tag":null,"quickstart_score":null,"quickstart_tag":null}