TypeScript: limit type to known registries

Author: lovell

index.d.ts

@@ -9,7 +9,18 @@ export class MediaType {
   constructor(mediaType?: string);
 
   essence: string;
-  type: string;
+  type:
+    | "application"
+    | "audio"
+    | "font"
+    | "image"
+    | "haptics"
+    | "message"
+    | "model"
+    | "multipart"
+    | "text"
+    | "video"
+    | "*";
   subtype: string;
   subtypeFacets: string[];
   suffix: string | null;

test/index.test-d.ts

@@ -7,7 +7,7 @@
 
 import { MediaType } from "..";
 
-const input: string = "a/b+c";
+const input: string = "application/test+json; charset=utf-8";
 
 const mediaTypeConstructed: MediaType = new MediaType(input);