ECMA6:
User.findOne({
name: 'stack'
}, (err, user) => {
if (err) throw err;
if (!user) {
console.log('No user was found');
} else {
console.log('User was found');
}
});
ECMA5.1:
User.findOne({
name: 'stack'
}, function (err, user) {
if (err) throw err;
if (!user) {
console.log('No user was found');
} else {
console.log('User was found');
}
});