/** Whether `WindowHelper` opens a location in a new tab or in a popup window. */
export declare enum WindowOpenMode {
    Tab = 0,
    Window = 1
}
/** Opens locations of the application in new tabs or popup windows. */
export declare class WindowHelper {
    private static readonly windowSizeReductionMultiplier;
    /** Opens the location, the current one by default, and resolves with the new window once its application is initialized. */
    static open(location?: URL, mode?: WindowOpenMode): Promise<Window>;
    static openAndFocus(...args: Parameters<typeof WindowHelper.open>): Promise<void>;
}
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