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8 changes: 8 additions & 0 deletions README.md
Original file line number Diff line number Diff line change
Expand Up @@ -24,16 +24,24 @@ __createLogger(options?: Object)__
#### __level (String)__
Level of `console`. `warn`, `error`, `info` or [else](https://developer.mozilla.org/en/docs/Web/API/console).

*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)*

##### Examples:
###### log only in dev mode
```javascript
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