import type { SSRElement } from '../../../@types/astro';
export declare const voidElementNames: RegExp;
export declare const toAttributeString: (value: any, shouldEscape?: boolean) => any;
export declare function defineScriptVars(vars: Record<any, any>): any;
export declare function formatList(values: string[]): string;
export declare function addAttribute(value: any, key: string, shouldEscape?: boolean): any;
export declare function internalSpreadAttributes(values: Record<any, any>, shouldEscape?: boolean): any;
export declare function renderElement(name: string, { props: _props, children }: SSRElement, shouldEscape?: boolean): string;
/**
 * This will take an array of async iterables and start buffering them eagerly.
 * To avoid useless buffering, it will only start buffering the next tick, so the
 * first sync iterables won't be buffered.
 */
export declare function bufferIterators<T>(iterators: AsyncIterable<T>[]): AsyncIterable<T>[];
export declare class EagerAsyncIterableIterator {
    #private;
    constructor(iterable: AsyncIterable<any>);
    /**
     * Starts to eagerly fetch the inner iterator and cache the results.
     * Note: This might not be called after next() has been called once, e.g. the iterator is started
     */
    buffer(): Promise<void>;
    next(): Promise<IteratorResult<any, any>>;
    isStarted(): boolean;
    [Symbol.asyncIterator](): this;
}