How to Read from stdin in JavaScript Posted in Polyglotbits on 20 of Aug, 2015

In javascript (nodejs anyway) stdin can be read as a stream of bytes. Therefore you need to tell node which encoding it is (utf-8 in our instance). We do the reads on the readable event, and read as much data as we can and print it to stdout.


process.stdin.on('readable', function() {
  var chunk =;
  if (chunk !== null) {