节点js net tcp客户端

Question

以下是net tcp客户端代码

var net = require('net');
var client = new net.Socket();
client.connect(1337, '127.0.0.1', function() {
   console.log('Connected');
   client.write('Hello server');
});

client.on('data', function(data) {
   console.log('Received: ' + data);
   client.destroy(); // kill client after server's response
});

client.on('close', function() {
   console.log('Connection closed');
});

client.write（＆＃39; Hello server＆＃39;）写在client.connect范围内。 有没有办法在client.connect范围之外使用它。

我尝试了以下代码但未能向服务器发送任何内容。但是，client.write的返回值返回true。

var net = require('net');
var client = new net.Socket();
client.connect(1337, '127.0.0.1', function() {
   console.log('Connected');
});

client.write('Hello server');  //Did not work