jsx working

src/helpers/normalizeFiletype.ts

@@ -0,0 +1,12 @@
+export const normalizeFiletype = (filetype: string): string => {
+  const lowercaseFiletype = filetype.toLowerCase();
+  
+  switch (lowercaseFiletype) {
+    case "jpg":
+      return "jpeg";
+    case "htm":
+      return "html";
+    default:
+      return lowercaseFiletype;
+  }
+}