interface WsEvent extends Event {
    type: string;
    target: any;
}
interface ErrorEvent extends WsEvent {
    error: unknown;
    message: string;
}
interface CloseEvent extends WsEvent {
    wasClean: boolean;
    code: number;
    reason: string;
}
interface MessageEvent extends WsEvent {
    data: any;
}
interface WsLikeWithHandlers {
    readonly CONNECTING: 0;
    readonly OPEN: 1;
    readonly CLOSING: 2;
    readonly CLOSED: 3;
    binaryType: string;
    readonly readyState: number;
    onclose(ev: CloseEvent): unknown;
    onmessage(ev: MessageEvent): unknown;
    onopen(ev: WsEvent): unknown;
    onerror(ev: ErrorEvent): unknown;
    send(data: unknown): void;
    close(code?: number, reason?: string): void;
}
type Nullable<T, K extends keyof T> = {
    [_K in keyof T]: _K extends K ? T[_K] | null : T[_K];
};
/**
 * A websocket-like interface that has all we need, this matches
 * "lib.dom.d.ts" and npm's "ws" websocket interfaces.
 */
type WsLike = Nullable<WsLikeWithHandlers, 'onclose' | 'onmessage' | 'onopen' | 'onerror'>;

export type { WsLike as W };