How to fix Error: stdio option must be inherited to use detached mode (detach spawning error) in Node.js

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

// This will fail
const child1 = spawn('my-daemon', {
  detached: true
  // Missing stdio configuration
});

// This works correctly
const child2 = spawn('my-daemon', {
  detached: true,
  stdio: 'ignore'
});

child2.unref();  // Allow parent to exit

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

const logDir = './logs';
if (!fs.existsSync(logDir)) {
  fs.mkdirSync(logDir, { recursive: true });
}

const outFile = fs.openSync(path.join(logDir, 'daemon.log'), 'a');
const errFile = fs.openSync(path.join(logDir, 'daemon.error.log'), 'a');

const child = spawn('my-daemon', {
  detached: true,
  stdio: ['ignore', outFile, errFile]
});

child.unref();

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

const child = spawn('my-daemon', ['--config', 'production.json'], {
  detached: true,
  stdio: 'ignore',
  cwd: '/home/app'
});

// Critical: allow the parent process to exit without waiting for child
child.unref();

console.log('Daemon started with PID:', child.pid);
// Parent can now exit, child continues running

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

const logFile = fs.openSync('./daemon.log', 'a');

// Option 1: stdin ignored, stdout/stderr to file
const child1 = spawn('daemon', {
  detached: true,
  stdio: ['ignore', logFile, logFile]
});

// Option 2: all streams ignored
const child2 = spawn('daemon', {
  detached: true,
  stdio: 'ignore'  // Shorthand for ['ignore', 'ignore', 'ignore']
});

// Option 3: stdin ignored, stdout inherited by file, stderr ignored
const errFile = fs.openSync('./error.log', 'a');
const child3 = spawn('daemon', {
  detached: true,
  stdio: ['ignore', logFile, errFile]
});

child1.unref();
child2.unref();
child3.unref();

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

// Only use detached if the child must run independently
// If the parent waits for the child anyway, this is unnecessary

// If you don't need detached mode:
const child = spawn('command', ['arg1', 'arg2'], {
  // detached: true  // Not needed
  stdio: 'inherit'  // Parent waits, so inherit is fine
});

// If you do need true independence:
const daemon = spawn('daemon', {
  detached: true,
  stdio: 'ignore'  // Required for detached
});

daemon.unref();