Trim langs from accept header

src/i8n.ts

@@ -107,7 +107,7 @@ export const randomLang = () => _.shuffle(["en-US", "nl-NL"])[0]!;
 
 export const asLANGs = (acceptLanguageHeader: string | undefined) => {
   const z = acceptLanguageHeader?.split(";")[0];
-  return z && z != "" ? z.split(",") : [];
+  return z && z != "" ? z.split(",").map(it => it.trim()) : [];
 };
 
 export type I8N = (...langs: string[]) => Lang;

tests/i8n.test.ts

@@ -21,6 +21,15 @@ describe("i8n", () => {
         ]);
       });
     });
+    describe("when there are multiple in the accept-langauge header with spaces", () => {
+      it("should split them out and return them", () => {
+        expect(asLANGs("es-ES, es, en-US;q=0.9, en;q=0.8")).toEqual([
+          "es-ES",
+          "es",
+          "en-US",
+        ]);
+      });
+    });
   });
 
   describe("langs", () => {