node.js:使用es6导入socket.io
我正在编写一个使用es6脚本在node.js中处理套接字连接的示例代码，在导入socket.io时会引发错误
import {
PORT
} from './config';
import express from 'express';
import io from 'socket.io';
var app = express();
// respond with "hello world" when a GET request is made to the homepage
app.get('/', function(req, res) {
res.send('hello world')
});
io.on('connection', function(socket) {
console.log('a user connected');
});
app.listen(PORT, () => console.log(`Example app listening on port ${PORT}!`));错误是
/index.js:17 _socket.default.on(‘连接’，函数(套接字){^
TypeError：_socket.default.on不是Object.on TypeError at Module._compile (module.js:643:30) at Module._compile (/Users/digvijay.upadhyay/digvijayu/websocket_with_node/node_modules/pirates/lib/index.js:83:24) at Module._extensions..js (module.js:654 )的函数:10) at Object.newLoader as .js at Module.load (module.js:556:32) at tryModuleLoad (module.js:499:12) at Function.Module._load (module.js:491:3) at Function.Module.runMain (module.js:684:10) at Object。(/Users/digvijay.upadhyay/digvijayu/websocket_with_node/node_modules/@babel/node/lib/_babel-node.js:224:23)节点应用程序崩溃-正在等待文件更改，然后再启动...使用Babel成功编译了%2个文件。使用Babel成功编译了2个文件。
回答 1
Stack Overflow用户
发布于 2018-10-23 03:43:44
您需要调用函数require('socket.io')()并传递一个express实例。
请看添加的代码示例：
const express = require('express');
const http = require('http');
const socketIO = require('socket.io');
const app = express();
const server = http.createServer(app);
// this line \/
const io = socketIO(server);
// this line /\
io.on('connection', (socket) => {
//...
});
server.listen(port, () => {
//...
});https://stackoverflow.com/questions/52936584
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