Read and write every line of input.txt into output.txt

lineread-and-write.js

/*
 * Read and write every line of input.txt into output.txt
 */

const fs = require("fs");

var writeStream = fs.createWriteStream("output.txt");

var lineReader = require('readline').createInterface({
  input: require('fs').createReadStream("input.txt")
});

lineReader.on('line', function(line) {
  writeStream.write(`${line}\n`);
});

lineReader.on('close', function(line) {
  writeStream.end();
});