electron-vite-react/src/main/index.ts

import os from 'os'
import { join } from 'path'
import { app, BrowserWindow } from 'electron'
import './samples/electron-store'

const isWin7 = os.release().startsWith('6.1')
if (isWin7) app.disableHardwareAcceleration()

if (!app.requestSingleInstanceLock()) {
  app.quit()
  process.exit(0)
}

let win: BrowserWindow | null = null

async function createWindow() {
  win = new BrowserWindow({
    title: 'Main window',
    webPreferences: {
      preload: join(__dirname, '../preload/index.cjs')
    },
  })

  if (app.isPackaged) {
    win.loadFile(join(__dirname, '../renderer/index.html'))
  } else {
    const pkg = await import('../../package.json')
    const url = `http://${pkg.env.HOST || '127.0.0.1'}:${pkg.env.PORT}`

    win.loadURL(url)
    win.webContents.openDevTools()
  }

  // Test active push message to Renderer-process.
  win.webContents.on('did-finish-load', () => {
    win?.webContents.send('main-process-message', (new Date).toLocaleString())
  })
}

app.whenReady().then(createWindow)

app.on('window-all-closed', () => {
  win = null
  if (process.platform !== 'darwin') {
    app.quit()
  }
})

app.on('second-instance', () => {
  if (win) {
    // Someone tried to run a second instance, we should focus our window.
    if (win.isMinimized()) win.restore()
    win.focus()
  }
})

app.on('activate', () => {
  const allWindows = BrowserWindow.getAllWindows()
  if (allWindows.length) {
    allWindows[0].focus()
  } else {
    createWindow()
  }
})