下面👇🏻的代码认不出来，求帮助

下面一段代码是什么语言？用什么软件运行？

const http = require('http');
const url = require('url');
const fs = require('fs');
let platGame = function (playAction) {
    var radom = Math.random() * 3;
    var obj = {};
    obj.playAction = playAction;
    var action, result;
    if (radom < 1) {
        action = "剪刀";
    } else if (radom > 2) {
        action = "石头";
    } else {
        action = "布";
    }
    obj.action = action;
    if (playAction == action) {
        result = "平局";
    } else if (action == "剪刀" && playAction == "石头" || action == "石头" && playAction == "布" || action == "布" && playAction == "剪刀") {
        result = "你赢了"
    } else {
        result = "你输了"
    }
    obj.result = result;
    return JSON.stringify(obj);
}
var parseQuery = function (query) {
    var reg = /([^=&\s]+)[=\s]*([^&\s]*)/g;
    var obj = {};
    while (reg.exec(query)) {
        obj[RegExp.$1] = decodeURI(RegExp.$2);
    }
    return obj;
}

http.createServer(function (req, res) {

    let parse = url.parse(req.url);
    let pathname = parse.pathname
    console.log(pathname);
    if (pathname === '/favicon.ico') {
        res.writeHead(200);
        res.end();
    };
    if (pathname == "/action") {
        var val = parseQuery(parse.query).playAction;
        res.writeHead(200, { "content-type": "text/html;charset=utf-8" });
        res.end(platGame(val));
    }
    if (pathname === '/') {
        fs.createReadStream(__dirname + "/index.html").pipe(res)
    }
}).listen(3000)

这是jquery、vue等前端代码，放到浏览器运行

nodejs后端运行，需要安装nodejs

这是 node.js