import { IchigoComponentOptions } from './IchigoComponentOptions';
/**
 * Defines and registers a custom element backed by ichigo.js reactivity.
 *
 * Usage:
 * ```html
 * <template id="my-list">
 *   <div>
 *     <ul v-if="items.length > 0">
 *       <li v-for="item of items">{{item.name}}</li>
 *     </ul>
 *     <slot></slot>
 *   </div>
 * </template>
 * ```
 * ```typescript
 * defineComponent('my-list', {
 *   template: '#my-list',
 *   props: ['items'],
 *   data() {
 *     return { items: this.items ?? [] };
 *   },
 * });
 * ```
 * ```html
 * <my-list :items="searchResults">
 *   <span slot="empty">No results.</span>
 * </my-list>
 * ```
 *
 * @param tagName  Custom element tag name (must contain a hyphen, e.g. 'my-card').
 * @param options  Component options including template selector and optional props.
 */
export declare function defineComponent(tagName: string, options: IchigoComponentOptions): void;