/**
 * Storybook template helpers for authoring bQuery component stories.
 *
 * `storyHtml` mirrors bQuery's string-based `html` tag while adding support for
 * Storybook-friendly boolean attribute shorthand (`?disabled=${true}`).
 *
 * @module bquery/storybook
 */
import type { UnsafeHtmlMarker } from './unsafe-html';
/**
 * A value that can be interpolated into a {@link storyHtml} template.
 *
 * Primitive values are coerced to strings; arrays are flattened; functions are
 * invoked and their return values are recursively resolved. {@link unsafeHtml}
 * markers bypass sanitization for the wrapped fragment.
 */
export type StoryValue = string | number | boolean | null | undefined | UnsafeHtmlMarker | StoryValue[] | (() => StoryValue);
/**
 * Tagged template literal for Storybook render functions.
 *
 * Supports boolean attribute shorthand compatible with Storybook's string
 * renderer:
 *
 * ```ts
 * storyHtml`<bq-button ?disabled=${true}>Save</bq-button>`;
 * // => '<bq-button disabled="">Save</bq-button>'
 * ```
 *
 * @param strings - Template literal string parts
 * @param values - Interpolated values
 * @returns HTML string compatible with `@storybook/web-components`
 */
export declare const storyHtml: (strings: TemplateStringsArray, ...values: StoryValue[]) => string;
/**
 * Conditionally render a value or template fragment.
 *
 * @param condition - Condition that controls rendering
 * @param truthyValue - Value or callback rendered when the condition is truthy
 * @param falsyValue - Optional value or callback rendered when the condition is falsy
 * @returns Rendered string fragment, or an empty string when the condition is
 * falsy and no fallback is provided
 */
export declare const when: (condition: unknown, truthyValue: StoryValue, falsyValue?: StoryValue) => string;
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