import { FormControlInstance, FormControlValue } from './form-control.mixin.js';
interface FormControlRadioInstance extends FormControlInstance {
    checked: boolean;
    updateCheckedState(): void;
}
export interface RadioFormControlMixin {
    new (...args: any[]): FormControlRadioInstance;
    formAssociated: boolean;
    readonly observedAttributes: string[];
}
type Constructor = new (...args: any[]) => HTMLElement & {
    connectedCallback?(): void;
    disconnectedCallback?(): void;
    attributeChangedCallback?(name: string, oldValue: string | null, newValue: string | null): void;
    requestUpdate?(name?: string, oldValue?: unknown): void;
} & {
    observedAttributes?: string[];
};
/**
 * Mixin that extends FormControlMixin with radio-specific functionality.
 * Provides native HTMLInputElement[type=radio]-like behavior for custom radio components.
 *
 * Features:
 * - checked: Get/set the checked state of the radio
 * - value: Defaults to 'on' (native radio behavior)
 * - type: Returns 'radio'
 * - CSS state management for :state(checked)
 * - Form value handling based on checked state
 * - Radio group exclusivity (only one radio with same name can be checked)
 */
export declare function RadioFormControlMixin<TBase extends Constructor, T extends FormControlValue>(SuperClass: TBase): TBase & RadioFormControlMixin;
export {};