2.14 One more thing: Redux Dev Tools

The Redux Dev Tool makes it much easier to view Redux state tracking and take advantage of cool features like time travel debugging.

We’ll install it on Chrome here.

  • Chrome extension install

  • Add for Redux store

Open the App.js file and modify the createStore part as follows:

Press + to interact
const store = createStore(appReducer);
-->
const store = createStore(appReducer, 
                          window.__REDUX_DEVTOOLS_EXTENSION__ && 
                          window.__REDUX_DEVTOOLS_EXTENSION__());
  • Check on browser
widget
import { getModelData } from '../services/BatteryService';

const initialState = {
  carstats: [
    { miles: 246, model: "60" },
    { miles: 250, model: "60D" },
    { miles: 297, model: "75" },
    { miles: 306, model: "75D" },
    { miles: 336, model: "90D" },
    { miles: 376, model: "P100D" }
  ],
  config: {
    speed: 55,
    temperature: 20,
    climate: true,
    wheels: 19
  }
}

function updateStats(state, newState) {
  return {
    ...state,
    config: newState.config,
    carstats: calculateStats(newState)
  }
}

function calculateStats(state) {
  const models = ['60', '60D', '75', '75D', '90D', 'P100D'];
  const dataModels = getModelData();
  return models.map(model => {
    const { speed, temperature, climate, wheels } = state.config;
    const miles = dataModels[model][wheels][climate ? 'on' : 'off'].speed[speed][temperature];
    return {
      model,
      miles
    };
  });
}

function appReducer(state = initialState, action) {
  switch (action.type) {
    case 'CHANGE_CLIMATE': {
      const newState = {
        ...state,
        config: {
          climate: !state.config.climate,
          speed: state.config.speed,
          temperature: state.config.temperature,
          wheels: state.config.wheels
        }
      };
      return updateStats(state, newState);
    }
    case 'SPEED_UP': {
      const newState = {
          ...state,
          config: {
            climate:state.config.climate,
            speed:action.value + action.step,
            temperature:state.config.temperature,
            wheels:state.config.wheels
          }
      };
      return updateStats(state, newState);
    }
    case 'SPEED_DOWN': {
      const newState = {
          ...state,
          config: {
            climate:state.config.climate,
            speed:action.value - action.step,
            temperature:state.config.temperature,
            wheels:state.config.wheels
          }
      };
      return updateStats(state, newState);
    }        
    case 'TEMPERATURE_UP': {
      const newState = {
          ...state,
          config: {
            climate:state.config.climate,
            speed:state.config.speed,
            temperature:action.value + action.step,
            wheels:state.config.wheels
          }
      };
      return updateStats(state, newState);
    }
    case 'TEMPERATURE_DOWN': {
      const newState = {
          ...state,
          config: {
            climate:state.config.climate,
            speed:state.config.speed,
            temperature:action.value - action.step,
            wheels:state.config.wheels
          }
      };
      return updateStats(state, newState);
    }        
    case 'CHANGE_WHEEL': {
      const newState = {
          ...state,
          config: {
            climate:state.config.climate,
            speed:state.config.speed,
            temperature:state.config.temperature,
            wheels:action.value
          }
      };
      return updateStats(state, newState);
    }    
    default:
      return state
  }
}

export default appReducer;