import type { Writable } from "svelte/store";
export declare type IFormStateValue = string | string[];
export interface IFormStateStore extends Writable<IFormStateValue> {
    clear(): void;
    push_value(value: string): void;
    remove_value(value: string): void;
}
export declare const CONTEXT_FORM_STATE: unique symbol;
export declare function formstate(default_value: IFormStateValue): IFormStateStore;
export declare function get_formstate_context(context_id?: Symbol): IFormStateStore | undefined;
export declare function make_formstate_context(default_value: IFormStateValue, context_id?: Symbol): IFormStateStore;