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webpack2でReactを使う

#Babel#PostCSS#React#webpack

webpacke2でReactの開発環境を作る。

フォルダ・ファイルを作る

$ mkdir react1 $ cd react1 $ mkdir src $ mkdir public $ touch public/index.html $ touch src/index.js $ touch webpack.config.js $ touch postcss.config.js

インストール

$ npm init -y $ npm i -D webpack webpack-dev-server $ npm i -D babel-loader babel-core babel-plugin-syntax-dynamic-import babel-preset-es2015 babel-preset-react $ npm i -D extract-text-webpack-plugin $ npm i -D style-loader css-loader postcss postcss-loader autoprefixer cssnano precss react-css-modules $ npm i -D react react-dom

package.jsonは下記のようになった。

{
  "name": "react1",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "keywords": [],
  "author": "",
  "license": "ISC",
  "devDependencies": {
    "autoprefixer": "^6.7.7",
    "babel-core": "^6.24.0",
    "babel-loader": "^6.4.1",
    "babel-plugin-syntax-dynamic-import": "^6.18.0",
    "babel-preset-es2015": "^6.24.0",
    "babel-preset-react": "^6.23.0",
    "css-loader": "^0.27.3",
    "cssnano": "^3.10.0",
    "extract-text-webpack-plugin": "^2.1.0",
    "postcss": "^5.2.16",
    "postcss-loader": "^1.3.3",
    "precss": "^1.4.0",
    "react": "^15.4.2",
    "react-css-modules": "^4.1.0",
    "react-dom": "^15.4.2",
    "style-loader": "^0.16.0",
    "webpack": "^2.3.1",
    "webpack-dev-server": "^2.4.2"
  }
}

webpack.config.jsを作る

var path = require('path');
const webpack = require('webpack');
var ExtractTextPlugin = require('extract-text-webpack-plugin');


module.exports = {
  entry: path.resolve(__dirname, 'src/index.js'),
  output: {
    filename: 'bundle.js',
    path: path.resolve(__dirname, 'public')
  },
  devServer: {
    contentBase: path.resolve(__dirname, 'public'),
    port: 8080,
  },
  module: {
    rules: [
      {
        test: /\.css$/,
        use: ExtractTextPlugin.extract({
          fallback: "style-loader",
          use: [
            'css-loader',
            'postcss-loader'
          ],
        })
      },
      {
        test: /\.js$/,
        use: [{
          loader: 'babel-loader',
          options: {
            presets: [
              ['es2015', {modules: false}],
              'react'
            ],
            plugins: ['syntax-dynamic-import']
          }
        }]
      }
    ]
  },
  plugins: [
    new ExtractTextPlugin('styles.css'),
    new webpack.optimize.UglifyJsPlugin({
      beautify: false,
      mangle: {
        screw_ie8: false,
        keep_fnames: false
      },
      compress: {
        screw_ie8: true
      },
      comments: false
    })
  ]
};

postcss.config.jsを作る

module.exports = {
  plugins: [
    require('autoprefixer')({}),
    require('cssnano')({}),
    require('precss')({}),
    require('react-css-modules')({})
  ]
}

public/index.htmlを作る

<!doctype html>
<html lang="ja">
  <head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <title>React App</title>
  </head>
  <body>
    <div id="root"></div>
    <script src="bundle.js"></script>
  </body>
</html>

src/index.jsを作る

import React from 'react';
import ReactDOM from 'react-dom';


ReactDOM.render(
  <h1>Hello, world!</h1>,
  document.getElementById('root')
);

webpackを実行する。実行後、public/bundle.jsが作成される。

$ webpack

webpack-dev-serverを実行する。実行後、http://localhost:8080にアクセスすると確認できる。

$ webpack-dev-server