Seed React BackOffice 🚀

Set up
Structure
Routes
- App routes 3.1
- Api routes 3.2
Dependencies
Deployment
Tests

Setup

Set up your environment variables for development:

cp _develop.env .env

First you have to install dependencies and then start the project.

To install dependencies execute the following command:

$ npm install

To run the project execute the following command:

$ npm run dev

It will open a page in your default browser at http://localhost:6000.

Structure

The project is split into the following directories. When writing code, use the following guidelines to determine where it should be placed. You can also take a look at the code yourself for in-depth examples.

src/
  app/
  components/
  constants/
  hooks/
  pages/
  routes/
  services/
  state/
  styles/
  utils/

src/app

Redux configuration.

src/components

Components to be share for the whole application.

src/constants

Constants to be share for the whole application.

src/hooks

Here you must write your custom hooks.

src/pages

Application pages.

src/routes

Here you must import application pages and add application routes.

src/services

Http requests.

src/state

You'll find four files: [stateName]Slice.js, sagas.js, selectors.js and index.js.

For this project we use Redux Toolkit instead of redux, it is easier to configure and reduces too much boilerplate code.

Using redux toolkit you don't need to create actions, types and reducer anymore. You only need to use createSlice function from redux-toolkit and it'll create actions for you. Here's an example of what it looks like:

import {createSlice} from '@reduxjs/toolkit';

export const counterSlice = createSlice({
  name: 'counter',
  initialState: {
    value: 0
  },
  reducers: {
    increment: state => {state.value += 1;},
    decrement: state => {state.value -= 1;}
  }
});

export const {increment, decrement} = counterSlice.actions;

export default counterSlice.reducer;

Then you should import the actions increment and decrement from our counterSlice in your component and use it throw dispatch. To dispatch an action you can use useDispatch hook from react-redux or you can use the connect function also from react-redux. I prefer to use connect because is easier to test the component and it's clearer.

Internally createSlice uses createReducer, so you may use Immer to write "mutating" logic and it doesn't actually mutate the state. For this reason is not necessary to spread state and merge the new value. Like this:

export const counterSlice = createSlice({
  name: 'counter',
  initialState: {
    value: 0
  },
  reducers: {
    increment: state => ({...state, value: state.value +=1 }),
    decrement: state => ({...state, value: state.value -=1 }),
  }
});

If you want to create actions, you can use createAction function from redux-toolkit. Then you should put the action inside extraReducers into the slice.

import {createSlice, createAction} from '@reduxjs/toolkit';

export const increment = createAction('increment');

export const counterSlice = createSlice({
  name: 'counter',
  initialState: {
    value: 0
  },
  reducers: {
    decrement: state => {state.value -= 1;}
  },
  extraReducers: builder => {
    builder.addCase(increment, (state, action) => {
        return state.value + action.payload;
    })
  }
});

export const {decrement} = counterSlice.actions;

export default counterSlice.reducer;

If you choose the above option you should move the actions to a new file.

src/theme

Custom theme for components and application.

src/utils

Functions to be shared for the whole application.

Routes

3.1 App routes usage

To create a new application route, you have to add your new route into src/routes folder, if the new route is when the user is not logged, you have to add the route into offline file; otherwise you have to add the route into online file. Don't forget to add the route into src/constants/routes to make future changes easier.

3.2 Api routes usage

To make a request to the API you must do this from sagas. In development mode you have to add your route in src/constants/apiRoutes.js file, but for production we don't expose the backend url, so you need to add the API route in server.js file.

Dependencies

These are the core dependencies you'll need to get acquainted yourself with:

React
Redux Toolkit (handles state management)
redux-saga (handles side-effects in Redux, such as API calls)
React Router (route management)
Redux-first-history (redux binding for React Router)
Material ui (component library our UI is built upon)
Formik (to make it easier to write forms with React)
Yup (handles form validation)
Storybook (component library)
Jest (testing framework)
React Testing Library (DOM interface for testing)
EsLint (used to lint code)

Tweaking the build config requires an understanding of the following. This isn't something we'll need to tweak often:

Babel (JavaScript compiler so we can write next-gen JS)
Webpack (module bundler)

Deployment

To deploy don't forget to change the environment variables for production. Then you must run the following command:

$ npm run build

It will create a dist folder in the root with the code bundled and minified. Then you have to serve the index.html file located in the dist folder running the following command in the dist folder:

$ node server.js

If you use pm2 you should run this command

$ pm2 start server.js --name <app-name>

Tests

To run the tests you must run the following command:

$ npm run test
$ npm run test:watch # Run in watch mode

When writing tests, make sure to use the following format to keep the tests clean and consistent:

import {getByText} from "@testing-library/react";

import Button from "./Button";

describe("<Button>", () => {
  let props;
  const getComponent = () => render(Button, props);
  beforeEach(() => {
    props.children = "Label";
  })

  it("should render `props.children`", () => {
    const {container} = getComponent();
    expect(getByText(container, props.children)).toBeInTheDocument();
  });

  describe("when `props.plus` is `true`", () => {
    beforeEach(() => {
      props.plus = true;
    })
    it("should render a plus character", () => {
      const {container} = getComponent();
      expect(getByText(`+ ${props.children}`)).toBeInTheDocument();
    });
  });
});

Lint the code and run tests:

$ npm run validate

indec-it / seed-react