/**
 * Custom Directive System
 * Allows creating reusable DOM manipulation behaviors
 *
 * @example
 * // Register a directive
 * Gyos.directive('focus', {
 *   mounted(el) {
 *     el.focus();
 *   }
 * });
 *
 * // Use in HTML
 * // <input g-focus />
 */
import type { Directive } from '../types';
/**
 * Register a custom directive
 *
 * @param name - Directive name (without 'g-' prefix)
 * @param def - Directive definition with lifecycle hooks or simple function
 *
 * @example
 * // Full definition
 * Gyos.directive('tooltip', {
 *   mounted(el, binding) {
 *     el.title = binding.value;
 *   },
 *   updated(el, binding) {
 *     el.title = binding.value;
 *   },
 *   unmounted(el) {
 *     el.title = '';
 *   }
 * });
 *
 * @example
 * // Shorthand (function applies to both mounted and updated)
 * Gyos.directive('color', (el, binding) => {
 *   el.style.color = binding.value;
 * });
 */
export declare function directive(name: string, def: Directive | Function): void;
/**
 * Get a directive
 */
export declare function getDirective(name: string): Directive | undefined;
/**
 * Apply directive to element
 */
export declare function applyDirective(el: HTMLElement, name: string, value: any, arg?: string[]): () => void;
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