use sh inside javascript

shell.js

const { spawn } = require('node:child_process')
const readline = require('node:readline');
const { stdin: input, stdout: output } = require('node:process');

const rl = readline.createInterface({ input, output });

const shell = spawn('sh')

shell.stdout.on('data', (data) => {
    process.stdout.write(data.toString())
    init()
});

function init() {
    rl.question('Enter command > ', (cmd) => {
        if (cmd == 'quit') {
            rl.close();
            shell.kill();
        }
        else {
            shell.stdin.write(`${cmd}\n`);
        }
    });
}

init()

read the docs:

• A note on process I/O
• std(in,out,err) on sub process