如何防止（延迟）操作系统（Windows 10）关闭电子窗口？

Question

I have made a desktop application using electron + node.js. Sometimes Windows does automatic updates and restarts the OS. I want to prevent Windows 10 from restarting until the data is saved (database is online so it takes some time to store data) in software.

Right now, I am using the below code to prevent the window from closing. After data save I am calling ipcMain.on('',function()) method and make lockwindow to true then i am calling window close method. It is working when normally window close or use shortcut keys for a close window. But this event is not emitted in case of force close or studown/restart

mainWindow.on('close', event => {
        if (lockWindow) {
            mainWindow.webContents.send('save', '');
            mainWindow.webContents.once('dom-ready', () => {
                mainWindow.webContents.send('save', '');
            });
            event.preventDefault();
            createdialogWindow();
        } else
            mainWindow = null
    })

Thank You.

Answer 1

Have a look at window events, specifically close and beforeunload .

You will have only limited time before the system restarts itself anyway.

If the OS or the user decides to kill your app, this is what is going to happen anyway (you can also upset / anger user for not playing nicely).

Lastly, would you like your application to be the reason why some crucial security updates did not install?

HTH