redux-devtools/packages/redux-devtools-instrument/README.md
2018-12-13 03:38:24 +02:00

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Redux DevTools Instrumentation
==============================
Redux enhancer used along with [Redux DevTools](https://github.com/reduxjs/redux-devtools) or [Remote Redux DevTools](https://github.com/zalmoxisus/remote-redux-devtools).
### Installation
```
npm install --save-dev redux-devtools-instrument
```
### Usage
Add the store enhancer:
##### `store/configureStore.js`
```js
import { createStore, applyMiddleware, compose } from 'redux';
import thunk from 'redux-thunk';
import devTools from 'remote-redux-devtools';
import reducer from '../reducers';
// Usually you import the reducer from the monitor
// or apply with createDevTools as explained in Redux DevTools
const monitorReducer = (state = {}, action) => state;
export default function configureStore(initialState) {
const enhancer = compose(
applyMiddleware(...middlewares),
// other enhancers and applyMiddleware should be added before the instrumentation
instrument(monitorReducer, { maxAge: 50 })
);
// Note: passing enhancer as last argument requires redux@>=3.1.0
return createStore(reducer, initialState, enhancer);
}
```
### API
`instrument(monitorReducer, [options])`
- arguments
- **monitorReducer** *function* called whenever an action is dispatched ([see the example of a monitor reducer](https://github.com/gaearon/redux-devtools-log-monitor/blob/master/src/reducers.js#L13)).
- **options** *object*
- **maxAge** *number* or *function*(currentLiftedAction, previousLiftedState) - maximum allowed actions to be stored on the history tree, the oldest actions are removed once `maxAge` is reached. Can be generated dynamically with a function getting current action as argument.
- **shouldCatchErrors** *boolean* - if specified as `true`, whenever there's an exception in reducers, the monitors will show the error message, and next actions will not be dispatched.
- **shouldRecordChanges** *boolean* - if specified as `false`, it will not record the changes till `pauseRecording(false)` is dispatched. Default is `true`.
- **pauseActionType** *string* - if specified, whenever `pauseRecording(false)` lifted action is dispatched and there are actions in the history log, will add this action type. If not specified, will commit when paused.
- **shouldStartLocked** *boolean* - if specified as `true`, it will not allow any non-monitor actions to be dispatched till `lockChanges(false)` is dispatched. Default is `false`.
- **shouldHotReload** *boolean* - if set to `false`, will not recompute the states on hot reloading (or on replacing the reducers). Default to `true`.
- **trace** *boolean* or *function* - if set to `true`, will include stack trace for every dispatched action. You can use a function (with action object as argument) which should return `new Error().stack` string, getting the stack outside of reducers. Default to `false`.
- **traceLimit** *number* - maximum stack trace frames to be stored (in case `trace` option was provided as `true`). By default it's `10`. Note that for Chrome there's a global limit to `10`, so you should also override the global `Error.stackTraceLimit` for more. If `trace` option is a function, `traceLimit` will have no effect, that should be handled there like so: `trace: () => new Error().stack.split('\n').slice(0, limit+1).join('\n')`. There's `+1` for `Error\n`.
### License
MIT