My app should print logs and run a node.js REPL. But logs mess up the REPL, so I tried to run the REPL in another TTY.

Here is a sample code:

// app.js

const fs = require('fs')
const repl = require('repl')
const getTTYFile = () => '/dev/pts/4' // TODO

const TTYFile = getTTYFile()

let read = fs.createReadStream(TTYFile)
let write = fs.createWriteStream(TTYFile)
repl.start({
    input: read, output: write,
    terminal: true, useColors: true
})

setInterval(() => console.log('I am log'), 1000)

I opened a terminal tab without shells in KDE. Then I started my nodejs app:

konsole --new-tab --hold -e tty # outputs `/dev/pts/4`
node app.js

Here are the problems:

• Input echoes twice, screenshot:
• Read-line doesn't work (Can not move the cursor or clear screen...).

How should I fix my code?