Question

我正在将socket.io用于我的Web应用程序的实时评论系统。我的前端javascript代码是这个

let socket = io();
    //when a comment is received from the server
    socket.on("comment", function(commentObject){
        console.log(commentObject);
    });
    function sendCommentToServer(name, email, message){
        let commentObject = {"name" :name,"email" : email ,"message" : message};
        socket.emit("comment", commentObject);
    }
    window.onload = function () {
        sendCommentToServer("vishal", "vish@gmail.com", "hello there");
    };

我正在使用node.js作为后端这是我的index.js文件的一些代码

const http = require('http');
const socketServer = http.Server(app);
const Socket = require('socket.io');
const io = Socket(socketServer);
io.on('connection', function(socket){
    console.log('a user connected');
    socket.broadcast.emit('hi');
    socket.on('disconnect', function () {
        console.log("user disconnected");
    });
    socket.on('comment', function (commentObject) {
        //sending the comment received to the rest of the users
        socket.emit("comment", commentObject);
    })
});
socketServer.listen(port, function () {
    console.log("Listening at port " + port);
});

我还没有在此处发布整个代码。这里只是套接字相关的代码。除此之外，我使用快递。我正在提供包含index.html和script.js（前端js）的Public文件夹。一切正常。但是，我仍然想问为什么控制台中会出现此错误。

socket.io-“未经检查的runtime.lastError：无法建立连接。接收端不存在。”

0 个答案: