ElectronのFirst Electron Appのページ見ながら、とりあえず動かしてみます。

　最近エディタはもっぱらVSCode、ほかにも、gitはGithub Desktop、ゲームのボイチャはDiscordだったりと、「electron」がベースになっているアプリ使う機会が増えました。ということで、自分でも試してみます。

今回参考にするのはここ「Writing Your First Electron App」

フォルダ作成

　first-appって名前でフォルダ作ります。作ったらそこに移動しときます。

mkdir first-app
cd first-app

first-appの中にこの３ファイル

first-appフォルダ

実装

　※ 参考元のはじめてのElectronみたいなコードそのままです。

package.json

electronはdevの方に入るのね。

{
  "name": "first-app",
  "version": "1.0.0",
  "description": "",
  "main": "main.js",
  "scripts": {
    "start": "electron ."
  },
  "devDependencies": {
    "electron": "^4.0.1"
  }
}

main.js

appとBrowserWindowを使えば、とりあえずアプリを開けるのか。

const { app, BrowserWindow } = require('electron')

// 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 win

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

  // and load the index.html of the app.
  win.loadFile('index.html')

  // Open the DevTools.
  win.webContents.openDevTools()

  // Emitted when the window is closed.
  win.on('closed', () => {
    // 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.
    win = 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', () => {
  // On macOS 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', () => {
  // On macOS 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 (win === 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.

index.html

<!DOCTYPE html>
<html>
  <head>
    <meta charset="UTF-8">
    <title>Hello World!</title>
  </head>
  <body>
    <h1>Hello World!</h1>
    We are using node <script>document.write(process.versions.node)</script>,
    Chrome <script>document.write(process.versions.chrome)</script>,
    and Electron <script>document.write(process.versions.electron)</script>.
  </body>
</html>

動作確認

インストールして実行すると、

npm install
npm start

electron起動。ただのHello Worldなのに、デバックToolが開いているからそれっぽくてかっこいい。