For a given media type, return the most relevant extension, or undefined if no extension can be found.

Extensions are returned without a leading ..

Examples

import { extension } from "https://deno.land/std@0.223.0/media_types/mod.ts";

extension("text/plain"); // `txt`
extension("application/json"); // `json`
extension("text/html; charset=UTF-8"); // `html`
extension("application/foo"); // undefined