/**
 * Tags a multiline string and return new one without line break characters and following spaces.
 *
 * @param {Array} strings Parts of the entire string without expressions.
 * @param {...string} expressions Expressions converted to strings, which are added to the entire string.
 * @returns {string}
 */
export declare function toSingleLine(strings: TemplateStringsArray | string[], ...expressions: unknown[]): string;
/**
 * Creates DOM element from the string. For example:
 * ```
 * const element = html`
 *  <div data-ref="example" class="example">
 *    <p>Example:</p>
 *    <span data-ref="counter">1</span>
 *  </div>
 * `
 * ```
 * Will create a `div` element with class `example` and a `span` and `p` element inside.
 * When `data-ref` attribute is used, the element will be added to the `refs` object.
 * ```
 * {
 *   fragment: ...,
 *   refs: {
 *    example: ..., // reference to the div element
 *    counter: ..., // reference to the span element
 *   }
 * }
 * ```
 * Tip: If necessary it can be extended to support other attributes or events.
 *
 * @param {string} strings Parts of the entire string without expressions.
 * @param  {*} values Expressions converted to strings, which are added to the entire string.
 * @returns {{ fragment: DocumentFragment, refs: {[key: string]: HTMLElement} }}
 */
export declare function html(strings: TemplateStringsArray, ...values: unknown[]): {
    fragment: DocumentFragment;
    refs: Record<string, HTMLElement>;
};