NodeJS语法问题

Question

我的node JS代码有问题，出现错误：

/root/dev/remote/remote.js:43
.on('connection', async (socket) => {
                        ^

SyntaxError: Unexpected token (
    at createScript (vm.js:56:10)
    at Object.runInThisContext (vm.js:97:10)
    at Module._compile (module.js:549:28)
    at Object.Module._extensions..js (module.js:586:10)
    at Module.load (module.js:494:32)
    at tryModuleLoad (module.js:453:12)
    at Function.Module._load (module.js:445:3)
    at Module.runMain (module.js:611:10)
    at run (bootstrap_node.js:394:7)
    at startup (bootstrap_node.js:160:9)
Launching Chromium
[486:527:0824/012248.628260:ERROR:bus.cc(394)] Failed to connect to the bus: Could not parse server address: Unknown address type (examples of valid types are "tcp" and on UNIX "unix")

(google-chrome:486): LIBDBUSMENU-GLIB-WARNING **: 01:22:49.591: Unable to get session bus: Unknown or unsupported transport ?disabled? for address ?disabled:?
[486:610:0824/012250.491318:ERROR:object_proxy.cc(619)] Failed to call method: org.freedesktop.DBus.Properties.Get: object_path= /org/freedesktop/UPower: org.freedesktop.DBus.Error.ServiceUnknown: The name org.freedesktop.UPower was not provided by any .service files
[486:610:0824/012250.493116:ERROR:object_proxy.cc(619)] Failed to call method: org.freedesktop.UPower.GetDisplayDevice: object_path= /org/freedesktop/UPower: org.freedesktop.DBus.Error.ServiceUnknown: The name org.freedesktop.UPower was not provided by any .service files
[486:610:0824/012250.497596:ERROR:object_proxy.cc(619)] Failed to call method: org.freedesktop.UPower.EnumerateDevices: object_path= /org/freedesktop/UPower: org.freedesktop.DBus.Error.ServiceUnknown: The name org.freedesktop.UPower was not provided by any .service files
^C[509:509:0824/012302.391101:ERROR:x11_util.cc(109)] X IO error received (X server probably went away)
[486:486:0824/012302.391250:ERROR:chrome_browser_main_extra_parts_x11.cc(62)] X IO error received (X server probably went away)

然而，这种语法非常好。

我尝试过重新安装节点/使用不同的版本，但我不确定它是否与此有关。

这是遥控器。js（还有更多，这只是相关领域）

const server = require('http').createServer();
const socketIO = io(server);

socketIO
.on('connection', async (socket) => {
    socket
    .use((socket, next) => {
        if(true) return null;
        if(socket.handshake.query && socket.handshake.query.token){
            jwt.verify(socket.handshake.query.token, 'SECRET_KEY', (err, decoded) => {
                if (err) return next(new Error('Authentication error'));
                socket.decoded = decoded;
                next();
            });
        }else{
            next(new Error('Authentication error'));
        }
    })

有人知道这是什么吗？我试图将Centos 7 VPS上的chromium实例显示到浏览器中，并通过浏览器进行控制。

Answer 1

您的旧节点是v6。默认情况下，17不支持async关键字（ES7功能）。有一个命令行开关，可以启用一些较新的功能，但老实说，该版本有点旧。

自节点。js现在可以升级到v12，以获得稳定的版本，您可能希望升级到较新的节点。如果要使用最新的语言功能，请使用js版本。