How to append to New Line in Node.js
It looks like you're running this on Windows (given your H://log.txt file path).
Try using \r\n instead of just \n.
Honestly, \n is fine; you're probably viewing the log file in notepad or something else that doesn't render non-Windows newlines. Try opening it in a different viewer/editor (e.g. Wordpad).
Use the os.EOL constant instead.
var os = require("os");function processInput ( text ) { fs.open('H://log.txt', 'a', 666, function( e, id ) { fs.write( id, text + os.EOL, null, 'utf8', function(){ fs.close(id, function(){ console.log('file is updated'); }); }); }); }
use \r\n combination to append a new line in node js
var stream = fs.createWriteStream("udp-stream.log", {'flags': 'a'}); stream.once('open', function(fd) { stream.write(msg+"\r\n"); });