// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.import{ types }from"./_db.ts"; /** * Returns the media type associated with the file extension. Values are * normalized to lower case and matched irrespective of a leading `.`. * * When `extension` has no associated type, the function returns `undefined`. * * @example * ```ts * import { typeByExtension } from "https://deno.land/std@$STD_VERSION/media_types/type_by_extension.ts"; * * typeByExtension("js"); // `application/json` * typeByExtension(".HTML"); // `text/html` * typeByExtension("foo"); // undefined * typeByExtension("file.json"); // undefined * ``` */exportfunctiontypeByExtension(extension:string):string|undefined{ extension = extension.startsWith(".")? extension.slice(1): extension;// @ts-ignore workaround around denoland/dnt#148return types.get(extension.toLowerCase());}