rg/en-US/docs/Web/JavaScript/Data_structures#Boolean_type" class="type">&#x3C;boolean></a> Setting <code>ipv6Only</code> to <code>true</code> will
disable dual-stack support, i.e., binding to address <code>::</code> won't make
<code>0.0.0.0</code> be bound. <strong>Default:</strong> <code>false</code>.</li>
<li><code>recvBufferSize</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Number_type" class="type">&#x3C;number></a> Sets the <code>SO_RCVBUF</code> socket value.<