Activate strict mode

src/module/ds4.ts

@@ -9,7 +9,7 @@ import { createCheckRoll } from "./rolls/check-factory";
 import { registerSystemSettings } from "./settings";
 import { migration } from "./migrations";
 
-Hooks.once("init", async function () {
+Hooks.once("init", async () => {
     console.log(`DS4 | Initializing the DS4 Game System\n${DS4.ASCII}`);
 
     game.ds4 = {
@@ -68,23 +68,11 @@ async function registerHandlebarsPartials() {
 /**
  * This function runs after game data has been requested and loaded from the servers, so entities exist
  */
-Hooks.once("setup", function () {
-    const noSort = ["attributes", "traits", "combatValues", "creatureSizeCategories"];
-
-    // Localize and sort CONFIG objects
-    for (const o of Object.keys(DS4.i18n)) {
-        const localized = Object.entries(DS4.i18n[o]).map((e) => {
-            return [e[0], game.i18n.localize(e[1] as string)];
-        });
-        if (!noSort.includes(o)) localized.sort((a, b) => a[1].localeCompare(b[1]));
-        DS4.i18n[o] = localized.reduce((obj, e) => {
-            obj[e[0]] = e[1];
-            return obj;
-        }, {});
-    }
+Hooks.once("setup", () => {
+    localizeAndSortConfigObjects();
 });
 
-Hooks.once("ready", function () {
+Hooks.once("ready", () => {
     migration.migrate();
 });
 
@@ -105,3 +93,24 @@ Hooks.once("ready", function () {
             });
     });
 });
+
+/**
+ * Localizes all objects in {@link DS4.i18n} and sorts them unless they are explicitly excluded.
+ */
+function localizeAndSortConfigObjects() {
+    const noSort = ["attributes", "traits", "combatValues", "creatureSizeCategories"];
+
+    const localizeObject = <T extends { [s: string]: string }>(obj: T, sort = true): T => {
+        const localized = Object.entries(obj).map(([key, value]) => {
+            return [key, game.i18n.localize(value)];
+        });
+        if (sort) localized.sort((a, b) => a[1].localeCompare(b[1]));
+        return Object.fromEntries(localized);
+    };
+
+    DS4.i18n = Object.fromEntries(
+        Object.entries(DS4.i18n).map(([key, value]) => {
+            return [key, localizeObject(value, !noSort.includes(key))];
+        }),
+    ) as typeof DS4.i18n;
+}