BREAKING CHANGE(core): switch to esm

ts/webstore.classes.webstore.ts

@@ -1,4 +1,4 @@
-import * as plugins from './webstore.plugins';
+import * as plugins from './webstore.plugins.js';
 
 export interface IWebStoreOptions {
   dbName: string;
@@ -22,6 +22,13 @@ export class WebStore<T = any> {
       return;
     }
     this.initCalled = true;
+
+    const smartenv = new plugins.smartenv.Smartenv();
+    if (!smartenv.isBrowser) {
+      const fetch = await smartenv.getSafeNodeModule('fake-indexeddb/auto.js');
+      globalThis.fetch = fetch.default;
+    }
+
     this.db = await plugins.idb.openDB(this.options.dbName, 1, {
       upgrade: (db) => {
         db.createObjectStore(this.options.storeName);