is entered in the console, use readline , the code is as follows

Node.jsstdinspawn</a>


const fs = require('fs');

const { spawn } = require('child_process');

var subProcess = spawn('cnpm.cmd', ['login'], { cmd: __dirname });
subProcess.on('error', function() {
    console.log('error');
    console.log(arguments);
});
subProcess.on('close', code => {
    if (code != 0) {
        console.log(`:${code}`);
    } else {
        console.log('');
    }
    process.stdin.end();
});
subProcess.stdin.on('end', () => {
    process.stdout.write('end');
});

subProcess.stdout.on('data', onData);
subProcess.stderr.on('data', onData);
function onData(data) {
    process.stdout.write('-sharp ' + data);
    process.stdin.on('data', input => {
        input = input.toString().trim();
        subProcess.stdin.write(input + '\n');
    });
}