@@ -381,7 +381,7 @@ function Socket(options) {
381381 'is not supported' ,
382382 ) ;
383383 }
384- if ( typeof options ?. keepAliveInitialDelay !== ' undefined' ) {
384+ if ( options ?. keepAliveInitialDelay !== undefined ) {
385385 validateNumber (
386386 options ?. keepAliveInitialDelay , 'options.keepAliveInitialDelay' ,
387387 ) ;
@@ -1319,7 +1319,7 @@ function lookupAndConnect(self, options) {
13191319 validateNumber ( localPort , 'options.localPort' ) ;
13201320 }
13211321
1322- if ( typeof port !== ' undefined' ) {
1322+ if ( port !== undefined ) {
13231323 if ( typeof port !== 'number' && typeof port !== 'string' ) {
13241324 throw new ERR_INVALID_ARG_TYPE ( 'options.port' ,
13251325 [ 'number' , 'string' ] , port ) ;
@@ -1776,7 +1776,7 @@ function Server(options, connectionListener) {
17761776 } else {
17771777 throw new ERR_INVALID_ARG_TYPE ( 'options' , 'Object' , options ) ;
17781778 }
1779- if ( typeof options . keepAliveInitialDelay !== ' undefined' ) {
1779+ if ( options . keepAliveInitialDelay !== undefined ) {
17801780 validateNumber (
17811781 options . keepAliveInitialDelay , 'options.keepAliveInitialDelay' ,
17821782 ) ;
@@ -1785,7 +1785,7 @@ function Server(options, connectionListener) {
17851785 options . keepAliveInitialDelay = 0 ;
17861786 }
17871787 }
1788- if ( typeof options . highWaterMark !== ' undefined' ) {
1788+ if ( options . highWaterMark !== undefined ) {
17891789 validateNumber (
17901790 options . highWaterMark , 'options.highWaterMark' ,
17911791 ) ;
@@ -2076,7 +2076,7 @@ Server.prototype.listen = function(...args) {
20762076 // or (options[, cb]) where options.port is explicitly set as undefined or
20772077 // null, bind to an arbitrary unused port
20782078 if ( args . length === 0 || typeof args [ 0 ] === 'function' ||
2079- ( typeof options . port === ' undefined' && 'port' in options ) ||
2079+ ( options . port === undefined && 'port' in options ) ||
20802080 options . port === null ) {
20812081 options . port = 0 ;
20822082 }
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