// W3C Spec Draft http://wicg.github.io/netinfo/
// Edition: Draft Community Group Report 20 February 2019

// http://wicg.github.io/netinfo/#navigatornetworkinformation-interface
declare interface Navigator extends NavigatorNetworkInformation {}
declare interface WorkerNavigator extends NavigatorNetworkInformation {}

// http://wicg.github.io/netinfo/#navigatornetworkinformation-interface
declare interface NavigatorNetworkInformation {
  readonly connection?: NetworkInformation;
}

// http://wicg.github.io/netinfo/#connection-types
type ConnectionType =
  | 'bluetooth'
  | 'cellular'
  | 'ethernet'
  | 'mixed'
  | 'none'
  | 'other'
  | 'unknown'
  | 'wifi'
  | 'wimax';

// http://wicg.github.io/netinfo/#effectiveconnectiontype-enum
type EffectiveConnectionType = '2g' | '3g' | '4g' | 'slow-2g';

// http://wicg.github.io/netinfo/#dom-megabit
type Megabit = number;
// http://wicg.github.io/netinfo/#dom-millisecond
type Millisecond = number;

// http://wicg.github.io/netinfo/#networkinformation-interface
interface NetworkInformation extends EventTarget {
  // http://wicg.github.io/netinfo/#type-attribute
  readonly type?: ConnectionType;
  // http://wicg.github.io/netinfo/#effectivetype-attribute
  readonly effectiveType?: EffectiveConnectionType;
  // http://wicg.github.io/netinfo/#downlinkmax-attribute
  readonly downlinkMax?: Megabit;
  // http://wicg.github.io/netinfo/#downlink-attribute
  readonly downlink?: Megabit;
  // http://wicg.github.io/netinfo/#rtt-attribute
  readonly rtt?: Millisecond;
  // http://wicg.github.io/netinfo/#savedata-attribute
  readonly saveData?: boolean;
  // http://wicg.github.io/netinfo/#handling-changes-to-the-underlying-connection
  onchange?: EventListener;
}