lux-framework/src/packages/application/utils/normalize-port.js

Build scalable, Node.js-powered REST APIs with almost no code.

// @flow

/**
 * @private
 */
export default function normalizePort(port?: string | number): number {
  switch (typeof port) {
    case 'string':
      return Number.parseInt(port, 10);

    case 'number':
      return Math.abs(port);

    default:
      return 4000;
  }
}