feat: app.on('activate') handle

src/main/index.ts

@@ -13,7 +13,7 @@ if (!app.requestSingleInstanceLock()) {
 
 let win: BrowserWindow | null = null
 
-async function mainWin() {
+async function createWindow() {
   win = new BrowserWindow({
     title: 'Main window',
     webPreferences: {
@@ -28,7 +28,6 @@ async function mainWin() {
     const url = `http://${pkg.env.HOST || '127.0.0.1'}:${pkg.env.PORT}`
 
     win.loadURL(url)
-    win.maximize()
     win.webContents.openDevTools()
   }
 
@@ -38,7 +37,7 @@ async function mainWin() {
   })
 }
 
-app.whenReady().then(mainWin)
+app.whenReady().then(createWindow)
 
 app.on('window-all-closed', () => {
   win = null
@@ -54,3 +53,12 @@ app.on('second-instance', () => {
     win.focus()
   }
 })
+
+app.on('activate', () => {
+  const allWindows = BrowserWindow.getAllWindows()
+  if (allWindows.length) {
+    allWindows[0].focus()
+  } else {
+    createWindow()
+  }
+})