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31 lines
972 B
TypeScript
31 lines
972 B
TypeScript
// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
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// This module is browser compatible.
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import { allExtensions } from "./all_extensions.ts";
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/**
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* Returns the most relevant extension for the given media type, or `undefined`
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* if no extension can be found.
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*
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* Extensions are returned without a leading `.`.
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*
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* @param type The media type to get the extension for.
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*
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* @returns The extension for the given media type, or `undefined` if no
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* extension is found.
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*
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* @example Usage
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* ```ts
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* import { extension } from "@std/media-types/extension";
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* import { assertEquals } from "@std/assert";
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*
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* assertEquals(extension("text/plain"), "txt");
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* assertEquals(extension("application/json"), "json");
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* assertEquals(extension("text/html; charset=UTF-8"), "html");
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* assertEquals(extension("application/foo"), undefined);
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* ```
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*/
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export function extension(type: string): string | undefined {
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return allExtensions(type)?.[0];
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}
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