如何将这个javascript模块更改为一个揭示模块模式？

Question

我有以下代码：

server.js：

var http = require("http");

function start() {
    function onRequest(request, response) {
        console.log("Request received.");
        response.writeHead(200, { "Content-Type": "text/plain" });
        response.write("Hello World");
        response.end();
    }

    http.createServer(onRequest).listen(8888);

    console.log("Server has started.");
}
exports.start = start;

index.js：

var server = require('./server');
server.start();

我尝试将server.js变成一个揭示模块模式：

var http = require("http");

var server = function() {
    function start() {
        function onRequest(request, response) {
            console.log("Request received.");
            response.writeHead(200, { "Content-Type": "text/plain" });
            response.write("Hello World");
            response.end();
        }

        http.createServer(onRequest).listen(8888);

        console.log("Server has started.");
    }

    return {
        start: start
    };
}();

但我收到错误：TypeError: server.start is not a function

我犯了什么错误？

感谢。

Answer 1

您忘记导出模块

exports = server;