node.js: take input from file using readline and process I/O in windows command prompt

Question

I want to run name.js file from the command prompt using node.js and pass the input file and redirect that output in output.txt, I am writing a command for this is node name.js < input.txt | > output.txt node name.js < input.txt | > output.txt but this is not working or I am wrong.

name.js look like this:

const readline = require('readline');

const rl = readline.createInterface({
  input: process.stdin,
  output: process.stdout
});
var _line = "";
rl.on('line', function(line){
    _line += line;
});
rl.on('pause', function(_line){
    console.log(_line);
});

I have also tried this in Powershell -Command "command"

EDIT : for example input.txt contain

hello js
hello node
hello world!

now,if i run node name.js < input.txt > output.txt . i just get return value of console.log()'s " undefined " in output.txt

Answer 1

passing _line to rl.on('pause',function( _line ){} hide the global _line that's why it's giving undefined and cmd command is fine.

there is other way to do this by using process I/O of node.js

function YourData(input) {
} 

process.stdin.resume();
process.stdin.setEncoding("ascii");
_input = "";
process.stdin.on("data", function (input) {
    _input += input;
});

process.stdin.on("end", function () {
   YourData(_input);
});

read more about readline and process I/O