Q&As: https://stackoverflow.com/questions/78786844/how-do-i-check-if-the-webview-and-the-app-are-not-focused/78786851#78786851

focus not detected right?: fix: use ipcRenderer and this snippet:

mainWindow.on('blur',function(){
 mainWindow.webContents.send('blur')
}
mainWindow.on('focus',function(){
 mainWindow.webContents.send('focus')
}