diff --git a/package.json b/package.json
index 7acd2e3..6495034 100644
--- a/package.json
+++ b/package.json
@@ -3,7 +3,7 @@
 	"description": "Iconify API",
 	"author": "Vjacheslav Trushkin",
 	"license": "MIT",
-	"version": "3.1.0-beta.1",
+	"version": "3.1.0-beta.2",
 	"publishConfig": {
 		"access": "public",
 		"tag": "next"
diff --git a/src/data/loading.ts b/src/data/loading.ts
index c8c0e3d..8cc7eac 100644
--- a/src/data/loading.ts
+++ b/src/data/loading.ts
@@ -22,6 +22,13 @@ export function loaded() {
 	}
 }
 
+/**
+ * Get state
+ */
+export function isLoading() {
+	return loading;
+}
+
 /**
  * Run when app is ready
  */
diff --git a/src/init.ts b/src/init.ts
index 850a6ed..db4e83e 100644
--- a/src/init.ts
+++ b/src/init.ts
@@ -2,19 +2,35 @@ import { getImporters } from './config/icon-sets.js';
 import { iconSetsStorage } from './data/icon-set/store/storage.js';
 import { setImporters, updateIconSets } from './data/icon-sets.js';
 import { cleanupStorageCache } from './data/storage/startup.js';
+import { Importer } from './types/importers.js';
+
+interface InitOptions {
+	// Cleanup storage cache
+	cleanup?: boolean;
+
+	// Importers
+	importers?: Importer[];
+}
 
 /**
  * Init API
  */
-export async function initAPI() {
+export async function initAPI(options: InitOptions = {}) {
 	// Reset old cache
-	await cleanupStorageCache(iconSetsStorage);
+	if (options.cleanup !== false) {
+		await cleanupStorageCache(iconSetsStorage);
+	}
 
 	// Get all importers and load data
-	const importers = await getImporters();
-	for (let i = 0; i < importers.length; i++) {
-		await importers[i].init();
+	let importers = options.importers;
+	if (!importers) {
+		importers = await getImporters();
+		for (let i = 0; i < importers.length; i++) {
+			await importers[i].init();
+		}
 	}
+
+	// Update
 	setImporters(importers);
 	updateIconSets();
 }