Server.on returns instance of server to allow chaining.
Server.on returns instance of server to allow chaining.

(and to be conform with http and https API, see https://nodejs.org/api/http.html#http_server_listen_port_hostname_backlog_callback)

molnarg/node-http2,scoky/node-http2,tbetbetbe/node-http2,5lava/node-http2,nwgh/node-http2,scoky/node-http2