/**
 * Canonicalizes a URL, useful for [IndieAuth Discovery](https://indieauth.spec.indieweb.org/#discovery-by-clients)
 * and RelMeAuth Discovery.
 *
 * @see [URL Canonicalization - IndieAuth spec](https://indieauth.spec.indieweb.org/#x3-4-url-canonicalization)
 */
export default function canonicalUrl(str: string, base?: string): string;
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