const childCommand = require('child-command');

childCommand('node -v')
.then((result) => {
  console.log(result.stdout); // v10.16.0
});


childCommand('exit 2')
.catch((error) => {
  console.log(error.code); // 2
});


childCommand('>&2 echo "error"')
.then((result) => {
  console.log(result.stderr); // error
})