<cfscript>
// Just a new line.
x="
";

// This shows only chr(10) for both Lucee and ACF
writeoutput( "pre-serialize char: ") ;
for ( j=1;j<=len(x);j++) {
  writeoutput( x.right(j).asc() & " " ) ;
}

writeoutput("<br>");

// Serialize x to JSON
y=serializeJSON(x);

// Which gives us:
writeoutput("serialized= " & y & "<br>");

//Now deserialize to see what characters are there:
z = deserializeJSON(y) ;

// What characters are there?
writeoutput( "post-serialize char: " ) ;
for ( i=1;i<=len(z);i++) {
  writeoutput( z.right(i).asc() & " " ) ;
}

/* LUCEE 5
pre-serialize char: 10 13
serialized= "\r\n"
post-serialize char: 10 13
*/
/* ACF 11+
pre-serialize char: 10
serialized= "\n"
post-serialize char: 10
*/

/*
Lucee: newLine() == \n
*/
</cfscript>