JS错误：参数列表后缺少）

Question

I'm trying to make an App in HbbTV to search for Hue-lamps, for this I need a upnp search. But my Chrome is just showing an error that shouldn't be there, in my opinion.

  const dgram = require('dgram'); const search = new Buffer([ 'M-SEARCH * HTTP/1.1', 'HOST: 239.255.255.250:1900', 'MAN: "ssdp:discover"', 'MX: 3', 'ST: upnp:rootdevice' ].join('\\r\\n')); const socket = dgram.createSocket('udp4'); socket.on('listening', () => { socket.addMembership('239.255.255.250'); socket.send(search, 0, search.length, 1900, 239.255.255.250); }); socket.on('message', (message) => { console.log(message.toString()); }); socket.bind(1900); 

It shows me an error in line 14:

SyntaxError: missing ) after argument list

Am I overseeing anything, or is something else wrong?

Best regards

Answer 1

您在下一行中错过了'' ，共239.255.255.250 ：

socket.send(search, 0, search.length, 1900, 239.255.255.250);