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// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.// This module is browser compatible.
import { extname as posixExtname } from "../path/posix/extname.ts";import { strip } from "./_strip.ts";
/** * Return the extension of the `URL` with leading period. The extension is * sourced from the path portion of the `URL`.  If there is no extension, * an empty string is returned. * * @example * ```ts * import { extname } from "https://deno.land/std@$STD_VERSION/url/extname.ts"; * * console.log(extname("https://deno.land/std/path/mod.ts")); // ".ts" * console.log(extname("https://deno.land/std/path/mod")); // "" * console.log(extname("https://deno.land/std/path/mod.ts?a=b")); // ".ts" * console.log(extname("https://deno.land/")); // "" * ``` * * @param url with extension * @returns extension (e.g. for url ending with `index.html` returns `.html`) */export function extname(url: string | URL): string {  url = new URL(url);  strip(url);  return posixExtname(url.pathname);}