launcher/app/main/index.js

const { app, BrowserWindow, dialog, protocol } = require('electron')
const { create: createMainWindow } = require('./windows/main')
const { MANUAL_CREATED_FLAG } = require('./constant')
const handleIPC = require('./ipc')

app.commandLine.appendSwitch("--disable-http-cache");
app.whenReady().then(() => {
    protocol.registerFileProtocol('file', (request, callback) => {
        const pathname = decodeURI(request.url.replace('file:///', ''));
        callback(pathname);
    });
    handleIPC();
    createMainWindow()
    app.on('browser-window-created', (event, window) => {
        setTimeout(() => {
            if (window[MANUAL_CREATED_FLAG]) { // allow safe created manually
                return
            }
            dialog.showMessageBox({
                type: "warning",
                title: "提示",
                message: "新开窗口必须使用内置openWindow接口",
            })
            try {
                window.destroy()
            } catch (e) {
                console.error(e)
            }
        }, 100)
    })

    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 (BrowserWindow.getAllWindows().length === 0) {
            createMainWindow()
        }
    })
})
// Quit when all windows are closed, except on macOS. There, it's common
// for applications and their menu bar to stay active until the user quits
// explicitly with Cmd + Q.
app.on('window-all-closed', function () {
    if (process.platform !== 'darwin') app.quit()
})