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ElectronとReact

3 min read

何度も繰り返したけれど、ぜーんぜんうまくいかないでやんの
色々なところでreactとElectronをコラボした記事はあるんだけれど、どれやってもエラーがでる。ぶっちゃけイライラしますよね。
仕方ないので確実な方法を自分で探して記述することにしました

■任意のフォルダに移動してcreate-react-appする

$ create-react-app APP_NAME

■createしたフォルダに移動しnpm install

$ cd APP_NAME
$ npm install --save-dev electron

■src/main.jsを作成

const electron = require('electron');
// Module to control application life.
const app = electron.app;
// Module to create native browser window.
const BrowserWindow = electron.BrowserWindow;

const path = require('path');
const url = require('url');

// Keep a global reference of the window object, if you don't, the window will
// be closed automatically when the JavaScript object is garbage collected.
let mainWindow;

function createWindow() {
    // Create the browser window.
    mainWindow = new BrowserWindow({width: 800, height: 600});

    // and load the index.html of the app.
    mainWindow.loadURL('http://localhost:3000');

    // Open the DevTools.
    mainWindow.webContents.openDevTools();

    // Emitted when the window is closed.
    mainWindow.on('closed', function () {
        // Dereference the window object, usually you would store windows
        // in an array if your app supports multi windows, this is the time
        // when you should delete the corresponding element.
        mainWindow = null
    })
}

// This method will be called when Electron has finished
// initialization and is ready to create browser windows.
// Some APIs can only be used after this event occurs.
app.on('ready', createWindow);

// Quit when all windows are closed.
app.on('window-all-closed', function () {
    // On OS X it is common for applications and their menu bar
    // to stay active until the user quits explicitly with Cmd + Q
    if (process.platform !== 'darwin') {
        app.quit()
    }
});

app.on('activate', function () {
    // On OS X it's common to re-create a window in the app when the
    // dock icon is clicked and there are no other windows open.
    if (mainWindow === null) {
        createWindow()
    }
});

// In this file you can include the rest of your app's specific main process
// code. You can also put them in separate files and require them here.

参考

■package.jsonの最終系

{
  "name": "electron-with-create-react-app",
  "version": "0.1.0",
  "private": true,
  "devDependencies": {
    "electron": "^1.4.14",
    "react-scripts": "0.8.5"
  },
  "dependencies": {
    "react": "^15.4.2",
    "react-dom": "^15.4.2"
  },
  "main": "src/electron-starter.js",
  "scripts": {
    "start": "react-scripts start",
    "build": "react-scripts build",
    "test": "react-scripts test --env=jsdom",
    "eject": "react-scripts eject",
    "electron": "electron ."
  }
}

■アプリ立ち上げ。注意点はreactをブラウザで立ち上げ、その後electronアプリを立ち上げる
browserがelectronに反映されるイメージ

$ npm start
$ npm run electron

■結論
これでreact+Electronのみというシンプルな構造はできましたが
色々いじった結果、Electron単体で十分ファイル分割はできることが発覚
サーバへの通信とかしないんだったら不要という結論に落ち着きました

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