npm install @feathersjs/errors --save

const errors = require('@feathersjs/errors');

// If you were to create an error yourself.
const notFound = new errors.NotFound('User does not exist');

// You can wrap existing errors
const existing = new errors.GeneralError(new Error('I exist'));

// You can also pass additional data
const data = new errors.BadRequest('Invalid email', {
  email: 'sergey@google.com'
});

// You can also pass additional data without a message
const dataWithoutMessage = new errors.BadRequest({
  email: 'sergey@google.com'
});

// If you need to pass multiple errors
const validationErrors = new errors.BadRequest('Invalid Parameters', {
  errors: { email: 'Email already taken' }
});

// You can also omit the error message and we'll put in a default one for you
const validationErrors = new errors.BadRequest({
  errors: {
    email: 'Invalid Email'
  }
});