Package Exports

redux-logger

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Readme

Logger for redux

logger

Install

npm i --save redux-logger

Usage

import createLogger from 'redux-logger';

const logger = createLogger();
const createStoreWithMiddleware = applyMiddleware(logger)(createStore);
const store = createStoreWithMiddleware(reducer);

API

redux-logger exposes single constructor function for creating logger middleware.

createLogger(options?: Object)

Options

level (String)

Level of console. warn, error, info or else.

Default: console.log

logger (Object)

Implementation of the console API. Useful if you are using a custom, wrapped version of console.

Default: window.console

collapsed (Boolean)

Is group collapsed?

Default: false

predicate (getState: Function, action: Object): boolean

If specified this function will be called before each action is processed with this middleware. Receives getState function for accessing current store state and action object as parameters. Returns true if action should be logged, false otherwise.

Default: null (always log)

transform (Function)

Transform state before print. Eg. convert Immutable object to plain JSON.

Default: identity function

Examples:

log only in dev mode

const __DEV__ = true;

createLogger({
  predicate: (getState, action) => __DEV__
});

log everything except actions with type `AUTH_REMOVE_TOKEN`

createLogger({
  predicate: (getState, action) => action.type !== AUTH_REMOVE_TOKEN
});

License

MIT

redux-logger