/**
 * Module that allows client-side code to use browser globals (such as `document` or `Node`) in a
 * way that allows those globals to be replaced by mocks in browser-less tests.
 *
 *    import {G} from 'browserGlobals';
 *    ... use G.document
 *    ... use G.Node
 *
 * Initially, the global `window` object, is the source of the global values.
 *
 * To use a mock of globals in a test, use:
 *
 *    import {pushGlobals, popGlobals} as G from 'browserGlobals';
 *    before(function() {
 *      pushGlobals(mockWindow);    // e.g. jsdom.jsdom(...).defaultView
 *    });
 *    after(function() {
 *      popGlobals();
 *    });
 */
export interface IBrowserGlobals {
    DocumentFragment: typeof DocumentFragment;
    Element: typeof Element;
    Node: typeof Node;
    document: typeof document;
    window: typeof window;
}
export interface IBrowserGlobalsLax extends IBrowserGlobals {
    window: any;
}
export declare const G: IBrowserGlobals;
/**
 * Replace globals with those from the given object. Use popGlobals() to restore previous values.
 */
export declare function pushGlobals(globals: IBrowserGlobalsLax): void;
/**
 * Restore the values of globals to undo the preceding pushGlobals() call.
 */
export declare function popGlobals(): void;