[Help] 在electron中建立一个websocket的服务

[JimmingSong]

我的需求是要在electron中建立一个websocket的后端服务， 我使用的是koa+koa-websocket我的目录结构是 |-electron |--server |----app.js

import Koa from 'koa';
import websock from 'koa-websocket';

const app = websock(new Koa());

app.listen(3000, () => {
    console.log('websocket server listening on port 3000');
})

然后再主进程文件main.ts中引入该文件，但是报如下错误

App threw an error during load
TypeError: WebSocketServer is not a constructor
    at KoaWebSocketServer.listen (D:\workspace\chat-task\dist-electron\main.js:16700:17)
    at Application.listen2 [as listen] (D:\workspace\chat-task\dist-electron\main.js:16738:13)
    at Object.<anonymous> (D:\workspace\chat-task\dist-electron\main.js:16746:5)
    at Module._compile (node:internal/modules/cjs/loader:1271:14)
    at Object..js (node:internal/modules/cjs/loader:1326:10)
    at Module.load (node:internal/modules/cjs/loader:1126:32)
    at node:internal/modules/cjs/loader:967:12
    at Function._load (node:electron/js2c/asar_bundle:2:13327)
    at loadApplicationPackage (D:\workspace\chat-task\node_modules\electron\dist\resources\default_app.asar\main.js:121:16)
    at Object.<anonymous> (D:\workspace\chat-task\node_modules\electron\dist\resources\default_app.asar\main.js:233:9)

我在dist-electron下的main.js文件中找到

var browser = function() {
  throw new Error(
    "ws does not work in the browser. Browser clients must use the native WebSocket object"
  );
};
const url = require$$0$6;
const https = require$$1$5;
const compose = koaCompose;
const co = co_1;
const ws = browser;
const WebSocketServer = ws.Server;

请问我该怎么解决

[qq10137383]

把这个包从devDependencies移动到dependencies试试，我之前用ws的包也是报ws does not work in the browser. Browser clients must use the native WebSocket object，用alias指定为入口也不行，报其他错误，最后修改为dependencies就好了。

[caoxiemeihao]

把这个包从devDependencies移动到dependencies试试，我之前用ws的包也是报ws does not work in the browser. Browser clients must use the native WebSocket object，用alias指定为入口也不行，报其他错误，最后修改为dependencies就好了。

对的，这样子 import 语句会直接编译成 require。 这个问题在 express 上也碰到过，后面有时间看看怎么处理它