import SlAlert from '@shoelace-style/shoelace/dist/components/alert/alert';
export declare class AlertBase extends SlAlert {
    constructor();
    open: boolean;
    closable: boolean;
    duration: number;
    color: 'primary' | 'secondary' | 'success' | 'warning' | 'info' | 'error' | string;
    emitShowHandler(): void;
    emitAfterShowHandler(): void;
    emitHideHandler(): void;
    emitAfterHideHandler(): void;
    getRenderClasses(): {
        'bp-alert--primary': boolean;
        'bp-alert--secondary': boolean;
        'bp-alert--success': boolean;
        'bp-alert--error': boolean;
        'bp-alert--info': boolean;
        'bp-alert--warning': boolean;
    };
    show(): Promise<void>;
    hide(): Promise<void>;
    toast(): Promise<void>;
    render(): import("lit-html").TemplateResult<1>;
}