/**
 * @license
 * Copyright Google LLC
 * SPDX-License-Identifier: Apache-2.0
 */
import { SafeHtml } from '../internals/html_impl.js';
import { TrustedResourceUrl } from '../internals/resource_url_impl.js';
import { SafeScript } from '../internals/script_impl.js';
/**
 * Returns HTML-escaped text as a `SafeHtml` object. No-op if value is already a
 * SafeHtml instance.
 *
 * Available options:
 * - `preserveSpaces` turns every second consecutive space character into its
 * HTML entity representation (`&#160;`).
 * - `preserveNewlines` turns newline characters into breaks (`<br>`).
 * - `preserveTabs` wraps tab characters in a span with style=white-space:pre.
 */
export declare function htmlEscape(value: SafeHtml | string, options?: {
    preserveNewlines?: boolean;
    preserveSpaces?: boolean;
    preserveTabs?: boolean;
}): SafeHtml;
/**
 * Creates a `SafeHtml` representing a script tag with inline script content.
 */
export declare function scriptToHtml(script: SafeScript, options?: {
    defer?: boolean;
    id?: string;
    nonce?: string;
    type?: string;
}): SafeHtml;
/**
 * Creates a `SafeHtml` representing a script tag with the src attribute.
 * This also supports CSP nonces and async loading.
 */
export declare function scriptUrlToHtml(src: TrustedResourceUrl, options?: {
    async?: boolean;
    attributionSrc?: string;
    customElement?: string;
    defer?: boolean;
    id?: string;
    nonce?: string;
    type?: string;
    crossorigin?: 'anonymous' | 'use-credentials';
}): SafeHtml;
/** Creates a `SafeHtml` value by concatenating multiple `SafeHtml`s. */
export declare function concatHtmls(htmls: ReadonlyArray<SafeHtml | string>): SafeHtml;
/**
 * Creates a `SafeHtml` value by concatenating multiple `SafeHtml`s interleaved
 * with a separator.
 */
export declare function joinHtmls(separator: SafeHtml | string, htmls: ReadonlyArray<SafeHtml | string>): SafeHtml;
/**
 * Returns a `SafeHtml` that contains `<!DOCTYPE html>`.
 * This is defined as a function to prevent the definition of a Trusted Type
 * policy when simply importing safevalues.
 */
export declare function doctypeHtml(): SafeHtml;
/**
 * Non-exported version of `nodeToHtml`, with an explicit temporary root to
 * accommodate for the sanitizer's user case.
 */
export declare function nodeToHtmlInternal(node: Node, temporaryRoot: Element): SafeHtml;
/**
 * Serializes a Node into it's HTML representation.
 *
 * Note: this method uses strict XML serialization to mitigate mutation issues
 * when the html is then re-parsed by the browser.
 */
export declare function nodeToHtml(node: Node): SafeHtml;