import type { HTMLButtonAttributes } from 'svelte/elements';
type Option = {
    key: string;
    label: string;
    unit?: string;
};
type $$ComponentProps = Omit<HTMLButtonAttributes, `onclick`> & {
    options: Option[];
    selected_key?: string;
    on_select?: (key: string, prev_key?: string) => void | Promise<void>;
    disabled?: boolean;
    format_option?: (opt: Option) => string;
};
declare const PortalSelect: import("svelte").Component<$$ComponentProps, {}, "selected_key">;
type PortalSelect = ReturnType<typeof PortalSelect>;
export default PortalSelect;