Integrated debug-MetaReducer from https://ngrx.io/guide/store/metareducers

[examples/angular-tour-of-heroes] / src / app / reducers / debug.ts

import { ActionReducer } from '@ngrx/store';

// console.log all actions
export function debug(reducer: ActionReducer<any>): ActionReducer<any> {
  return function(state, action) {
    console.log('state', state);
    console.log('action', action);

    return reducer(state, action);
  };
}