Merge pull request #2 from xDivisionByZerox/suggestion-literal-union

Author: chwoerz

literal_union.ts

@@ -0,0 +1,13 @@
+type LiteralUnion<Suggestions extends string> = Suggestions | (string & {});
+
+type ImageMimiTypes =
+    "image/bmp" |
+    "image/gif" |
+    "image/png" |
+    "image/svg+xml" |
+    "image/tiff" |
+    "image/vnd.microsoft.icon" |
+    "image/webp";
+
+let validValueWithMimeType: LiteralUnion<ImageMimiTypes> = 'image/bmp'; // this is valid and was suggested automatically
+let validValueWithoutMimeType: LiteralUnion<ImageMimiTypes> = ''; // this is still valid