> For the complete documentation index, see [llms.txt](https://www.ngxs.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://www.ngxs.io/v18.0/concepts/store/meta-reducer.md).

# Meta Reducers

A meta reducer is a higher order reducer that allows you to take action on the global state rather than a state slice. In NGXS, we don't have this concept but you can accomplish this with [plugins](https://github.com/ngxs/store/blob/v18.0/docs/concepts/store/broken-reference/README.md).

An example of a meta reducer might be to clear the entire state when a user logs out. An example implementation would be:

```ts
import { getActionTypeFromInstance } from '@ngxs/store';

export function logoutPlugin(state, action, next) {
  // Use the get action type helper to determine the type
  if (getActionTypeFromInstance(action) === Logout.type) {
    // if we are a logout type, lets erase all the state
    state = {};
  }

  // return the next function with the empty state
  return next(state, action);
}
```

Then add it to `providers`:

```ts
import { NGXS_PLUGINS } from '@ngxs/store/plugins';

export const appConfig: ApplicationConfig = {
  providers: [
    provideStore([]),

    {
      provide: NGXS_PLUGINS,
      useValue: logoutPlugin,
      multi: true
    }
  ]
};
```

Now when we dispatch the logout action it will use our new plugin and erase the state.