Todos App - premiers pas avec create-react-app

Step -1 - installation de yarn

npm install -g yarn

Step 0

npx create-react-app todos-app
cd todos-app

Step 1 - src/index.js

index.js et le fichier de départ de notre application. Nous allons supprimer le contenu du fichier src/index.css et inclure bootstrap5 à la place

Nous allons s'abord installer bootstrap5 dans notre projet

yarn add bootstrap@next

Suite à l'installation, nous allons trouver le dossier bootstrap dans node_modules. Nous allons importer le fichier node_modules/bootstrap/dist/css/bootstrap.css.

// src/index.js

import React from "react"
import ReactDOM from "react-dom"
import "bootstrap/dist/css/bootstrap.css"
import App from "./App"
// ... rien ne change ensuite

Step 2 public/index.html

Le fichier HTML qui contient l'élément <div id="root"></div> de notre application se trouve dans le répértoire public.

C'est dans le fichier public/index.html où nous devons modifier l'attribut lang, title et des attributs meta.

Step 3 - App.js et App.css

Nous n'avons pas besoin d'un fichier .css global. Nous allons supprimer le fichier App.css et nous ne l'importons pas. À la fin de cette étape notre app devrait afficher le titre ToDosApp

/* src/App.js */
import React from "react"

function App() {
  return (
    <div className="container my-4">
      <h1 className="text-center">ToDos App</h1>
    </div>
  )
}

export default App

Step 4 components folder

Nous avons besoin des components à inclure : <Todos />, <Todo /> et <AddToDoForm />

Nous allons placer tous les components dans un nouveau dossier components.

mkdir src/components

Voici la structure que nous allons créer :

src
├── App.js
├── App.test.js
├── components
│   ├── AddTodoForm.js
│   ├── Todo.js
│   └── Todos.js
├── index.css
├── index.js
├── serviceWorker.js
└── setupTests.js

Step 5 Nos components et leurs dépendences

Todos utilise :
Todo
AddTodoForm
ainsi que la bibliothèque externe uuid, que nous devons installer

yarn add uuidv4

// src/components/Todos.js
import React, { useState } from "react"
import Todo from "./Todo"
import AddTodoForm from "./AddTodoForm"
import { uuid } from "uuidv4"

const Todos = () => {
  return null
}

export default Todos

// src/components/Todo.js
import React from "react"

const Todo = () => {
  return null
}

export default Todo

// src/components/AddTodoForm.js
import React from "react"

const AddTodoForm = () => {
  return null
}

export default AddTodoForm

et notre App.js

// src/App.js
import React from "react"
import Todos from "./components/Todos"

function App() {
  return (
    <div className="container my-4">
      <h1 className="text-center">ToDos App</h1>
      <Todos />
    </div>
  )
}

export default App

Todos.js

Avec import React, { useState } from "react" nous importons useState directement donc nous n'avons plus besoin d'utiliser React.useState.
uuid est un named import, et nous allons utiliser uuid au lieu de uuidv4

// src/components/Todos.js
import React, { useState } from "react"
import Todo from "./Todo"
import AddTodoForm from "./AddTodoForm"
import { uuid } from "uuidv4"

const Todos = () => {
  const [todos, setTodos] = useState([])

  const addTodo = (todo) => {
    setTodos([...todos, { text: todo, isCompleted: false, id: uuid() }])
  }
  const toggleCompleteTodo = (todo) => {
    setTodos(
      todos.map((item) => {
        if (item.id === todo.id) {
          item.isCompleted = !item.isCompleted
        }
        return item
      })
    )
  }
  const deleteTodo = (todo) => {
    setTodos(
      todos.filter((item) => {
        return item.id !== todo.id
      })
    )
  }
  const completedCount = todos.filter((el) => el.isCompleted).length
  return (
    <>
      <h2 className="text-center">
        Ma liste de tâches ({completedCount} / {todos.length})
      </h2>
      {todos.map((todo) => {
        return (
          <Todo
            key={todo.id}
            todo={todo}
            handleCompleteClick={toggleCompleteTodo}
            handleDeleteClick={deleteTodo}
          />
        )
      })}
      <AddTodoForm handler={addTodo} />
    </>
  )
}

export default Todos

Todo

This project was bootstrapped with Create React App.

Available Scripts

In the project directory, you can run:

`yarn start`

Runs the app in the development mode.
Open http://localhost:3000 to view it in the browser.

The page will reload if you make edits.
You will also see any lint errors in the console.

`yarn test`

Launches the test runner in the interactive watch mode.
See the section about running tests for more information.

`yarn build`

Builds the app for production to the build folder.
It correctly bundles React in production mode and optimizes the build for the best performance.

The build is minified and the filenames include the hashes.
Your app is ready to be deployed!

See the section about deployment for more information.

`yarn eject`

Note: this is a one-way operation. Once you eject, you can’t go back!

If you aren’t satisfied with the build tool and configuration choices, you can eject at any time. This command will remove the single build dependency from your project.

Instead, it will copy all the configuration files and the transitive dependencies (webpack, Babel, ESLint, etc) right into your project so you have full control over them. All of the commands except eject will still work, but they will point to the copied scripts so you can tweak them. At this point you’re on your own.

You don’t have to ever use eject. The curated feature set is suitable for small and middle deployments, and you shouldn’t feel obligated to use this feature. However we understand that this tool wouldn’t be useful if you couldn’t customize it when you are ready for it.

Learn More

You can learn more in the Create React App documentation.

To learn React, check out the React documentation.

pehaa/alyra-react-todos

Todos App - premiers pas avec create-react-app

Step -1 - installation de yarn

Step 0

Step 1 - src/index.js

Step 2 public/index.html

Step 3 - App.js et App.css

Step 4 components folder

Step 5 Nos components et leurs dépendences

Todos.js

Todo

Available Scripts

yarn start

yarn test

yarn build

yarn eject

Learn More

Code Splitting

Analyzing the Bundle Size

Making a Progressive Web App

Advanced Configuration

Deployment

yarn build fails to minify

`yarn start`

`yarn test`

`yarn build`

`yarn eject`

`yarn build` fails to minify