2
1

Delete article

Deleted articles cannot be recovered.

Draft of this article would be also deleted.

Are you sure you want to delete this article?

More than 5 years have passed since last update.

ReduxのサンプルのTodoリストを真似てみる。Part.1

Last updated at Posted at 2018-05-27

Redux ExampleのTodo Listをはじめからていねいに(1)を参考にさせて頂いて、Reduxのコードを書いた。

0.留意点

  • 初心者の覚書です。
  • 自分の環境で動くように参考にしたコードを適当に修正している。
  • Windows10 64bit , PowerShellなどで動かしている。
  • 見栄えを若干よくする為にbootstrap4を利用している。

1.PowerShellで環境準備

PowerShell
PS C:\Users\Taro\Desktop> mkdir ws


    ディレクトリ: C:\Users\Taro\Desktop


Mode                LastWriteTime         Length Name
----                -------------         ------ ----
d-----       2018/05/27     14:26                ws


PS C:\Users\Taro\Desktop> cd ws
PS C:\Users\Taro\Desktop\ws> npm init -y
Wrote to C:\Users\Taro\Desktop\ws\package.json:

{
  "name": "ws",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "keywords": [],
  "author": "",
  "license": "ISC"
}


PS C:\Users\Taro\Desktop\ws> npm i -D babel-core babel-loader babel-preset-env babel-preset-react
npm notice created a lockfile as package-lock.json. You should commit this file.                                                                        es-commonjs
npm WARN babel-loader@7.1.4 requires a peer of webpack@2 || 3 || 4 but none is installed. You must install peer dependencies yourself.
npm WARN ws@1.0.0 No description
npm WARN ws@1.0.0 No repository field.

+ babel-preset-env@1.7.0
+ babel-core@6.26.3
+ babel-preset-react@6.24.1
+ babel-loader@7.1.4
added 128 packages from 67 contributors in 9.211s
[+] no known vulnerabilities found [2032 packages audited]

PS C:\Users\Taro\Desktop\ws> npm i -D webpack webpack-cli webpack-dev-server
npm WARN deprecated nomnom@1.8.1: Package no longer supported. Contact support@npmjs.com for more info.
npm WARN deprecated babel-preset-es2015@6.24.1: 🙌  Thanks for using Babel: we recommend using babel-preset-env now: please read babeljs.io/env to update!
npm WARN ws@1.0.0 No description                                                                                                                        es\extend-shallow
npm WARN ws@1.0.0 No repository field.
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents@1.2.4 (node_modules\fsevents):
npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for fsevents@1.2.4: wanted {"os":"darwin","arch":"any"} (current: {"os":"win32","arch":"x64"})

+ webpack-cli@2.1.4
+ webpack@4.9.1
+ webpack-dev-server@3.1.4
added 805 packages from 507 contributors in 29.534s
[+] no known vulnerabilities found [17167 packages audited]

PS C:\Users\Taro\Desktop\ws> npm install --save react  react-dom redux react-redux  prop-types
npm WARN ws@1.0.0 No description                                                                                                                        ments
npm WARN ws@1.0.0 No repository field.
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents@1.2.4 (node_modules\fsevents):
npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for fsevents@1.2.4: wanted {"os":"darwin","arch":"any"} (current: {"os":"win32","arch":"x64"})

+ react-redux@5.0.7
+ react-dom@16.4.0
+ redux@4.0.0
+ prop-types@15.6.1
+ react@16.4.0
added 17 packages from 86 contributors in 5.909s
[+] no known vulnerabilities found [17300 packages audited]

PS C:\Users\Taro\Desktop\ws> ni .babelrc , webpack.config.js, index.html


    ディレクトリ: C:\Users\Taro\Desktop\ws


Mode                LastWriteTime         Length Name
----                -------------         ------ ----
-a----       2018/05/27     14:28              0 .babelrc
-a----       2018/05/27     14:28              0 webpack.config.js
-a----       2018/05/27     14:28              0 index.html


PS C:\Users\Taro\Desktop\ws> mkdir src, dist


    ディレクトリ: C:\Users\Taro\Desktop\ws


Mode                LastWriteTime         Length Name
----                -------------         ------ ----
d-----       2018/05/27     14:29                src
d-----       2018/05/27     14:29                dist


PS C:\Users\Taro\Desktop\ws> cd src
PS C:\Users\Taro\Desktop\ws\src> mkdir actions, components, containers, reducers


    ディレクトリ: C:\Users\Taro\Desktop\ws\src


Mode                LastWriteTime         Length Name
----                -------------         ------ ----
d-----       2018/05/27     14:29                actions
d-----       2018/05/27     14:29                components
d-----       2018/05/27     14:29                containers
d-----       2018/05/27     14:29                reducers


PS C:\Users\Taro\Desktop\ws\src> cd ..
PS C:\Users\Taro\Desktop\ws> code .

2.プロジェクトの設定ファイルを編集

.bashrc
{
    "presets": [
        "env","react"
    ]
}
package.json
{
  "name": "ws",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1",
    "build": "webpack --progress",
    "start": "webpack-dev-server --watch --progress"
  },
  "keywords": [],
  "author": "",
  "license": "ISC",
  "devDependencies": {
    "babel-core": "^6.26.3",
    "babel-loader": "^7.1.4",
    "babel-preset-env": "^1.7.0",
    "babel-preset-react": "^6.24.1",
    "webpack": "^4.9.1",
    "webpack-cli": "^2.1.4",
    "webpack-dev-server": "^3.1.4"
  },
  "dependencies": {
    "prop-types": "^15.6.1",
    "react": "^16.4.0",
    "react-dom": "^16.4.0",
    "react-redux": "^5.0.7",
    "redux": "^4.0.0"
  }
}

webpack.config.js
const path = require('path');

module.exports = {
  mode:'development',
    entry: './src/index.js',
    output: {
      path: path.join(__dirname,'dist'),
      filename: 'index.js',
      publicPath: path.join(__dirname,'dist')
    },
    devtool: '#source-map',
    devServer: {
      contentBase: './',
      port: 8080
    },
    module: {
      rules: [
        { test: /\.js$/, exclude: /node_modules/, loader: 'babel-loader' }
      ]
    }
  };
  

3.ファイルを大まかに作成

プロジェクトディレクトリ/index.html
<!DOCTYPE html>
<html>
  <head>
    <meta charset="UTF-8">
    <title>ReduxでTodoリストを作ろう</title>
    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" integrity="sha384-Gn5384xqQ1aoWXA+058RXPxPg6fy4IWvTNh0E263XmFcJlSAwiGgFAW/dAiS6JXm" crossorigin="anonymous">
  </head>
  <body>
    <div id="root"></div>
    <script src="dist/index.js"></script>
  </body>
</html>
components/App.js
import React from 'react';

const App = ()=>(
    <h1>ダミーH1</h1>
)

export default App;
reducers/index.js
const reducers =  (state,action)=>{
    return state;
}
export default reducers;
./index.js
import React from 'react';
import ReactDOM from 'react-dom';
import { Provider } from 'react-redux';
import reducers from './reducers'
import { createStore } from 'redux';
import App from './components/App'

let store = createStore(reducers);

ReactDOM.render(
    <Provider store={store}>
        <App />
    </Provider>,
    document.getElementById('root')
);

コマンド実行
npm run build
npm run start

http://localhost:8080で動作確認

ソースコード 01

3.stateをTodo用に加工し、コンソールで確認

actionCreatorをつくる

actionを作る関数

actions/index.js
let nextTodoId=0
const addTodo= (text)=>{
    return{
        type:'ADD_TODO',
        id:nextTodoId++,
        text

    }
}
export default addTodo;

reducersを修正

actionとstateを引数にとり、なかでアプリケーションのロジックを駆使して新しいstateを返す関数をつくる。名前もreducersからtodoに変更している。

reducers/index.js
const todo = (state, action) => {
    switch (action.type) {
        case 'ADD_TODO':
            return {
                id: action.id,
                text: action.text
            }
        default:
            return state;
    }
}
export default todo;

index.jsを修正

index.js
import React from 'react';
import ReactDOM from 'react-dom';
import { Provider } from 'react-redux';
import todo from './reducers'
import { createStore } from 'redux';
import App from './components/App'
import addTodo from './actions'

let store = createStore(todo);
store.dispatch(addTodo('Todo 1番目'));
console.log(store.getState());

ReactDOM.render(
    <Provider store={store}>
        <App />
    </Provider>,
    document.getElementById('root')
);

http://localhost:8080で動作確認。コンソールにstateが出てくればOK

ソースコード 02

追記

編集リクエストで シンタックスハイライトのところ、JavaScript->jsxして頂いた方、ありがとうございます。2018/05/28 16:31

2
1
0

Register as a new user and use Qiita more conveniently

  1. You get articles that match your needs
  2. You can efficiently read back useful information
  3. You can use dark theme
What you can do with signing up
2
1

Delete article

Deleted articles cannot be recovered.

Draft of this article would be also deleted.

Are you sure you want to delete this article?