如何禁用Electron应用连接本地服务器时的错误弹窗？

我开发了一款需连接本地服务器才能运行的Electron应用，启动后通过Node.js的net库尝试连接服务器，若1秒内未连接成功则自动重试，连接成功后正常运行。目前遇到的问题是：当客户端无法找到或连接服务器时，会弹出错误弹窗（Ubuntu和Windows系统均会出现），我希望禁用该弹窗，而非解决连接错误本身。

相关代码 #

main.js #

const express = require('express');
const ChatApp = express();

require('./backend/scripts/javascript/net_receiver.js');
require('./backend/scripts/javascript/websocket_receiver.js');

ChatApp.use(express.static('./frontend'));

ChatApp.listen(3003, function() 
{
    console.log('\nControl Panel Server Running on Port 3003');
});

const { app, BrowserWindow } = require("electron");

app.commandLine.appendSwitch('ignore-certificate-errors');
process.env['ELECTRON_DISABLE_SECURITY_WARNINGS'] = true

let mainWindow;

function createWindow() 
{
    mainWindow = new BrowserWindow(
    {
        icon:               'frontend/chat_app/css/App_Logo.jpg',
        width:              700,
        height:             830,
        //autoHideMenuBar:  true,
        //fullscreen:       true,
        webPreferences: 
        {
            nodeIntegration: true,
        }
    });

    mainWindow.loadURL("http://localhost:3003");
    
    mainWindow.on("closed", function () 
    {
        mainWindow = null;
    });
}

app.on("ready", createWindow);

app.on("resize", function (e, x, y) 
{
    mainWindow.setSize(x, y);
});

app.on("window-all-closed", function () 
{
    if (process.platform !== "darwin") 
    {
        app.quit();
    }
});

app.on("activate", function () 
{
    if (mainWindow === null) 
    {
        createWindow();
    }
});

net_client_sender.js #

const net       = require('net');
const client    = new net.Socket();
const settings  = require("../../settings/comms_settings.json");

netClient = {}

netClient.client = client;

netClient.ConnectToPLC = () =>
{
    client.connect(settings["modbusPORT"], settings["plcIPv4"]);
}

netClient.SendRequest = (msg) =>
{
    client.write(msg);
}

module.exports = netClient;

net_client_receiver.js #

api         = require("./api.js");
netClient   = require("./net_client.js");

var connected = false;

/*Check if there is a connection to the PLC,*/ 
/*if not wait a moment and try to connect again*/
var CheckConnection = () =>
{
    /*if there is no connection to PLC*/
    var connectionTester = setInterval(() => 
    {
        if (connected === false)
        {
            console.log("Connection to PLC failed!");
            console.log("Retrying connection...\n\n");

            /*Retry connection to PLC*/
            netClient.ConnectToPLC();
        }
        /*if there is a connection to the PLC*/ 
        else
        {
            /*stop trying to connect to the PLC*/
            clearInterval(connectionTester);
        }
    }, 1000);
}

netClient.client.on("timeout", () => 
{
    connected = false;
    CheckConnection();
});

netClient.client.on("connect", () => 
{
    connected = true;
    api.StartMainLoop();
});

netClient.client.on("data", (data) => 
{
    api.ReadModbusMessage(data);
});

netClient.ConnectToPLC();
CheckConnection();

Electron弹出的系统错误弹窗，本质是net.Socket触发的未捕获错误被Electron转化为系统级提示。只需为socket添加error事件监听器，手动捕获错误即可禁用弹窗：

步骤1：添加错误事件监听 #

修改net_client_receiver.js，在现有事件监听后添加以下代码：

netClient.client.on("error", (err) => {
    connected = false;
    console.log("Connection error:", err.message);
    // 无需额外操作，CheckConnection会自动执行重试逻辑
});

步骤2：优化连接重试逻辑（可选） #

为避免重复使用已失效的socket实例，可修改net_client_sender.js的ConnectToPLC方法，每次重试时创建新的socket并设置超时：

netClient.ConnectToPLC = () =>
{
    // 销毁旧的socket连接（如果存在）
    if (!client.destroyed) {
        client.destroy();
    }
    // 创建新的socket实例
    netClient.client = new net.Socket();
    client = netClient.client;
    
    // 设置1秒连接超时，和你的重试间隔匹配
    client.setTimeout(1000);
    
    client.connect(settings["modbusPORT"], settings["plcIPv4"]);
}

修改完成后，未处理的连接错误会被捕获，Electron将不再弹出系统级错误弹窗，同时完全保留你的自动重试逻辑。

内容的提问来源于stack exchange，提问作者user19365766