export type FormControlState = File | FormData | string | null;
export interface SetFormControlValueOptions {
    inactive?: boolean;
    state?: FormControlState;
}
export interface SetRepeatedFormControlValueOptions {
    inactive?: boolean;
    state?: FormControlState;
}
/**
 * Set one form-associated value while consistently omitting inactive controls.
 * Pass `state` only when restoration differs from the submitted value.
 */
export declare function setFormControlValue(internals: ElementInternals, value: File | string | null, options?: SetFormControlValueOptions): void;
/**
 * Submit repeated values under one field name and preserve a serialized array
 * for browser form-state restoration.
 */
export declare function setRepeatedFormControlValue(internals: ElementInternals, name: string | null | undefined, values: readonly (number | string)[], options?: SetRepeatedFormControlValueOptions): void;
export declare function restoreStringFormState(state: FormControlState, fallback?: string): string;
export declare function restoreStringArrayFormState(state: FormControlState): string[];
export declare function restoreNumberArrayFormState(state: FormControlState, maximumValues?: number): number[];
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