@shopify/app-bridge/MessageTransport.d.ts

**Shopify is doubling our engineering staff in 2021! [Join our team and work on libraries like this one.](https://smrtr.io/5GGrc)**

import type { AnyAction, ActionCallback, Unsubscribe } from './actions/types';
import type { TransportDispatch, Dispatcher } from './client/types';
declare global {
    interface Window {
        MobileWebView: {
            postMessage(message?: any): void;
            context?(): string;
        };
        __context__?: string;
    }
}
export declare enum Context {
    Modal = "Modal",
    Main = "Main"
}
/**
 * @deprecated Not to be used, use regular `MessageEvent` instead.
 * @internal
 */
export interface HandlerData {
    data: AnyAction;
}
/**
 * @internal
 */
export declare type Handler = (event: MessageEvent) => void;
/**
 * @internal
 */
export interface MessageTransport {
    dispatch(message: TransportDispatch): void;
    hostFrame: Window;
    localOrigin: string;
    subscribe(handler: Handler): () => void;
}
export interface ContextualMessageTransport extends MessageTransport {
    context: Context;
    frameWindow: Window | null;
    dispatch(message: any): void;
}
/**
 * Create a MessageTransport from an IFrame.
 * @remarks
 * Used on the host-side to create a postMessage MessageTransport.
 * @beta
 */
export declare function fromFrame(frame: HTMLIFrameElement, localOrigin: string, context: Context): ContextualMessageTransport;
/**
 * Create a MessageTransport from a parent window.
 * @remarks
 * Used on the client-side to create a postMessage MessageTransport.
 * @internalremarks
 * In unframed mode, message should be dispatched via MobileWebView.postMessage instead of postMessage.
 * @beta
 */
export declare function fromWindow(contentWindow: Window, localOrigin: string): MessageTransport;
/**
 * @internal
 */
export interface ActionListener {
    id?: string;
    callback(data: any): void;
}
/**
 * @internal
 */
export interface ActionListenersMap {
    [index: string]: ActionListener[];
}
/**
 * @internal
 */
export interface Subscribe {
    (callback: ActionCallback, id?: string): Unsubscribe;
    (eventNameSpace: string, callback: ActionCallback, id?: string): Unsubscribe;
}
/**
 * @internal
 */
export interface TransportListener {
    createSubscribeHandler(dispatcher?: Dispatcher): Subscribe;
    handleMessage(message: any): void;
    handleActionDispatch(action: AnyAction): boolean;
}
export declare function createTransportListener(): TransportListener;