javascript - server.address().address is not set when https.createServer() in node -

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simple this:

server.address().address blank. why this? can set it?

server = https.createserver(options, app).listen(port, function () {   console.log('listening on https://' + server.address().address + ':' + server.address().port); });

which returns

listening on https://:::9804

server.address() returns

{ address: '::', family: 'ipv6', port: 9804 }


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