diff --git a/CHANGELOG.md b/CHANGELOG.md
index 903544d8..a65851d5 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,13 @@ First release.
 > This section will be removed after the beta phase. <br>
 > Note that semantic versioning rules are not strictly followed during this phase.
 
+- v0.15.0: Rename modules `common`, `deferred`, `drag_observer`, `types`, `util`
+  to `wb_common`, `wb_deferred`, `wb_drag_observer`, `wb_types`, `wb_util` to
+  avoid name conflicts with other libraries.
+- v0.15.0: Update TS version to ES2020 to allow using `Promise.allSettled()` and other features.
+- v0.15.0: Update module format to "bundler" to allow better tree-shaking and smaller bundles.
+- v0.15.0: Assume that `globalThis` is available (requires Node.js >= v12).
+
 - v0.14.1: Fix checkbox assignment bug in wb_node.ts where the value was not being assigned to this.checkbox.
 
 - v0.14.0: Refactor sorting:
@@ -117,7 +124,6 @@ First release.
 - v0.7.0: #69 prevent iOS browser from opening links on drop.
 - v0.7.0: BREAKING CHANGE:
   Changed syntax format for compressed formats:
-
   - `_keyMap: {"t": "title", ...}` -> `_keyMap: {"title": "t", ...}`.
   - `_typeList: [...]` -> `_valueMap: {"type": [...]}`.
     This allows to compress values of other properties than `type`.
diff --git a/docs/demo/demo-custom.js b/docs/demo/demo-custom.js
index 0b526ba7..71256aeb 100644
--- a/docs/demo/demo-custom.js
+++ b/docs/demo/demo-custom.js
@@ -1,7 +1,7 @@
 /**
  * Demo code for Wunderbaum (https://github.com/mar10/wunderbaum).
  *
- * Copyright (c) 2021-2025, Martin Wendt (https://wwWendt.de).
+ * Copyright (c) 2021-2026, Martin Wendt (https://wwWendt.de).
  */
 
 /* global mar10 */
diff --git a/docs/demo/demo-editable.js b/docs/demo/demo-editable.js
index 3cdb682f..8b6f24ec 100644
--- a/docs/demo/demo-editable.js
+++ b/docs/demo/demo-editable.js
@@ -1,7 +1,7 @@
 /**
  * Demo code for Wunderbaum (https://github.com/mar10/wunderbaum).
  *
- * Copyright (c) 2021-2025, Martin Wendt (https://wwWendt.de).
+ * Copyright (c) 2021-2026, Martin Wendt (https://wwWendt.de).
  */
 /* global mar10 */
 /* eslint-disable no-console */
diff --git a/docs/demo/demo-fixedcol.js b/docs/demo/demo-fixedcol.js
index 9b09a470..db14b7b7 100644
--- a/docs/demo/demo-fixedcol.js
+++ b/docs/demo/demo-fixedcol.js
@@ -1,7 +1,7 @@
 /**
  * Demo code for Wunderbaum (https://github.com/mar10/wunderbaum).
  *
- * Copyright (c) 2021-2025, Martin Wendt (https://wwWendt.de).
+ * Copyright (c) 2021-2026, Martin Wendt (https://wwWendt.de).
  */
 /* global mar10 */
 /* eslint-disable no-console */
diff --git a/docs/demo/demo-grid.js b/docs/demo/demo-grid.js
index 0f77bd81..15662c29 100644
--- a/docs/demo/demo-grid.js
+++ b/docs/demo/demo-grid.js
@@ -1,7 +1,7 @@
 /**
  * Demo code for Wunderbaum (https://github.com/mar10/wunderbaum).
  *
- * Copyright (c) 2021-2025, Martin Wendt (https://wwWendt.de).
+ * Copyright (c) 2021-2026, Martin Wendt (https://wwWendt.de).
  */
 /* global mar10 addCssImport */
 /* eslint-disable no-console */
diff --git a/docs/demo/demo-large.js b/docs/demo/demo-large.js
index 4697a6ff..a4062a9f 100644
--- a/docs/demo/demo-large.js
+++ b/docs/demo/demo-large.js
@@ -1,7 +1,7 @@
 /**
  * Demo code for Wunderbaum (https://github.com/mar10/wunderbaum).
  *
- * Copyright (c) 2021-2025, Martin Wendt (https://wwWendt.de).
+ * Copyright (c) 2021-2026, Martin Wendt (https://wwWendt.de).
  */
 /* global mar10 */
 /* eslint-disable no-console */
diff --git a/docs/demo/demo-minimal.js b/docs/demo/demo-minimal.js
index 7c24e95a..619132b0 100644
--- a/docs/demo/demo-minimal.js
+++ b/docs/demo/demo-minimal.js
@@ -1,7 +1,7 @@
 /**
  * Demo code for Wunderbaum (https://github.com/mar10/wunderbaum).
  *
- * Copyright (c) 2021-2025, Martin Wendt (https://wwWendt.de).
+ * Copyright (c) 2021-2026, Martin Wendt (https://wwWendt.de).
  */
 /* global mar10 */
 
diff --git a/docs/demo/demo-plain.js b/docs/demo/demo-plain.js
index d215fc7a..45dc27eb 100644
--- a/docs/demo/demo-plain.js
+++ b/docs/demo/demo-plain.js
@@ -1,7 +1,7 @@
 /**
  * Demo code for Wunderbaum (https://github.com/mar10/wunderbaum).
  *
- * Copyright (c) 2021-2025, Martin Wendt (https://wwWendt.de).
+ * Copyright (c) 2021-2026, Martin Wendt (https://wwWendt.de).
  */
 /* global mar10 */
 /* eslint-disable no-console */
diff --git a/docs/demo/demo-readonly.js b/docs/demo/demo-readonly.js
index ad54a30d..1eff00c5 100644
--- a/docs/demo/demo-readonly.js
+++ b/docs/demo/demo-readonly.js
@@ -1,7 +1,7 @@
 /**
  * Demo code for Wunderbaum (https://github.com/mar10/wunderbaum).
  *
- * Copyright (c) 2021-2025, Martin Wendt (https://wwWendt.de).
+ * Copyright (c) 2021-2026, Martin Wendt (https://wwWendt.de).
  */
 /* global mar10 */
 /* eslint-disable no-console */
diff --git a/docs/demo/demo-select.js b/docs/demo/demo-select.js
index 06dafe17..75365c4c 100644
--- a/docs/demo/demo-select.js
+++ b/docs/demo/demo-select.js
@@ -1,7 +1,7 @@
 /**
  * Demo code for Wunderbaum (https://github.com/mar10/wunderbaum).
  *
- * Copyright (c) 2021-2025, Martin Wendt (https://wwWendt.de).
+ * Copyright (c) 2021-2026, Martin Wendt (https://wwWendt.de).
  */
 /* global mar10, addCssImport */
 /* eslint-disable no-console */
diff --git a/docs/demo/demo-welcome.js b/docs/demo/demo-welcome.js
index 6ee9c67a..04e5d943 100644
--- a/docs/demo/demo-welcome.js
+++ b/docs/demo/demo-welcome.js
@@ -1,7 +1,7 @@
 /**
  * Demo code for Wunderbaum (https://github.com/mar10/wunderbaum).
  *
- * Copyright (c) 2021-2025, Martin Wendt (https://wwWendt.de).
+ * Copyright (c) 2021-2026, Martin Wendt (https://wwWendt.de).
  */
 /* global mar10 */
 
diff --git a/docs/unittest/test-core-fixture1.js b/docs/unittest/test-core-fixture1.js
index 1c14dba3..0409c8aa 100644
--- a/docs/unittest/test-core-fixture1.js
+++ b/docs/unittest/test-core-fixture1.js
@@ -1,6 +1,6 @@
 /*!
  * Wunderbaum - Unit Test
- * Copyright (c) 2021-2025, Martin Wendt. Released under the MIT license.
+ * Copyright (c) 2021-2026, Martin Wendt. Released under the MIT license.
  * @VERSION, @DATE (https://github.com/mar10/wunderbaum)
  */
 
diff --git a/docs/unittest/test-core.js b/docs/unittest/test-core.js
index fdca2c80..1c2aa3ce 100644
--- a/docs/unittest/test-core.js
+++ b/docs/unittest/test-core.js
@@ -1,6 +1,6 @@
 /*!
  * Wunderbaum - Unit Test
- * Copyright (c) 2021-2025, Martin Wendt. Released under the MIT license.
+ * Copyright (c) 2021-2026, Martin Wendt. Released under the MIT license.
  * @VERSION, @DATE (https://github.com/mar10/wunderbaum)
  */
 /* global mar10, QUnit */
diff --git a/src/common.ts b/src/wb_common.ts
similarity index 99%
rename from src/common.ts
rename to src/wb_common.ts
index d5d46518..621b20ec 100644
--- a/src/common.ts
+++ b/src/wb_common.ts
@@ -1,6 +1,6 @@
 /*!
  * Wunderbaum - common
- * Copyright (c) 2021-2025, Martin Wendt. Released under the MIT license.
+ * Copyright (c) 2021-2026, Martin Wendt. Released under the MIT license.
  * @VERSION, @DATE (https://github.com/mar10/wunderbaum)
  */
 
@@ -11,8 +11,8 @@ import {
   SourceObjectType,
   IconMapType,
   MatcherCallback,
-} from "./types";
-import * as util from "./util";
+} from "./wb_types";
+import * as util from "./wb_util";
 import { WunderbaumNode } from "./wb_node";
 
 export const DEFAULT_DEBUGLEVEL = 4; // Replaced by rollup script
diff --git a/src/debounce.ts b/src/wb_debounce.ts
similarity index 94%
rename from src/debounce.ts
rename to src/wb_debounce.ts
index 578c0c61..54fd5d10 100644
--- a/src/debounce.ts
+++ b/src/wb_debounce.ts
@@ -1,6 +1,6 @@
 /*!
- * Wunderbaum - debounce.ts
- * Copyright (c) 2021-2025, Martin Wendt. Released under the MIT license.
+ * Wunderbaum - wb_debounce.ts
+ * Copyright (c) 2021-2026, Martin Wendt. Released under the MIT license.
  * @VERSION, @DATE (https://github.com/mar10/wunderbaum)
  */
 /*
@@ -36,27 +36,10 @@ export interface DebouncedFunction<F extends Procedure> {
 }
 
 /* --- */
-/** Detect free variable `global` from Node.js. */
-const freeGlobal =
-  typeof global === "object" &&
-  global !== null &&
-  global.Object === Object &&
-  global;
-
-/** Detect free variable `globalThis` */
-const freeGlobalThis =
-  typeof globalThis === "object" &&
-  globalThis !== null &&
-  globalThis.Object == Object &&
-  globalThis;
-
-/** Detect free variable `self`. */
-const freeSelf =
-  typeof self === "object" && self !== null && self.Object === Object && self;
-
 /** Used as a reference to the global object. */
 const root =
-  freeGlobalThis || freeGlobal || freeSelf || Function("return this")();
+  (typeof globalThis !== "undefined" && globalThis) ||
+  Function("return this")();
 
 /**
  * Checks if `value` is the
diff --git a/src/deferred.ts b/src/wb_deferred.ts
similarity index 93%
rename from src/deferred.ts
rename to src/wb_deferred.ts
index afc89a02..c5bb77e7 100644
--- a/src/deferred.ts
+++ b/src/wb_deferred.ts
@@ -1,6 +1,6 @@
 /*!
- * Wunderbaum - deferred
- * Copyright (c) 2021-2025, Martin Wendt. Released under the MIT license.
+ * Wunderbaum - wb_deferred
+ * Copyright (c) 2021-2026, Martin Wendt. Released under the MIT license.
  * @VERSION, @DATE (https://github.com/mar10/wunderbaum)
  */
 
diff --git a/src/drag_observer.ts b/src/wb_drag_observer.ts
similarity index 98%
rename from src/drag_observer.ts
rename to src/wb_drag_observer.ts
index 25c6950a..85460e81 100644
--- a/src/drag_observer.ts
+++ b/src/wb_drag_observer.ts
@@ -1,6 +1,6 @@
 /*!
- * Wunderbaum - drag_observer
- * Copyright (c) 2021-2025, Martin Wendt. Released under the MIT license.
+ * Wunderbaum - wb_drag_observer
+ * Copyright (c) 2021-2026, Martin Wendt. Released under the MIT license.
  * @VERSION, @DATE (https://github.com/mar10/wunderbaum)
  */
 
diff --git a/src/wb_ext_dnd.ts b/src/wb_ext_dnd.ts
index ae0c69fd..41fbe893 100644
--- a/src/wb_ext_dnd.ts
+++ b/src/wb_ext_dnd.ts
@@ -1,10 +1,10 @@
 /*!
  * Wunderbaum - ext-dnd
- * Copyright (c) 2021-2025, Martin Wendt. Released under the MIT license.
+ * Copyright (c) 2021-2026, Martin Wendt. Released under the MIT license.
  * @VERSION, @DATE (https://github.com/mar10/wunderbaum)
  */
-import * as util from "./util";
-import { EventCallbackType, onEvent } from "./util";
+import * as util from "./wb_util";
+import { EventCallbackType, onEvent } from "./wb_util";
 import { Wunderbaum } from "./wunderbaum";
 import { WunderbaumExtension } from "./wb_extension_base";
 import { WunderbaumNode } from "./wb_node";
@@ -13,8 +13,8 @@ import {
   DropEffectType,
   DropRegionType,
   DropRegionTypeSet,
-} from "./types";
-import { DebouncedFunction, throttle } from "./debounce";
+} from "./wb_types";
+import { DebouncedFunction, throttle } from "./wb_debounce";
 
 const nodeMimeType = "application/x-wunderbaum-node";
 
diff --git a/src/wb_ext_edit.ts b/src/wb_ext_edit.ts
index e519a4c7..ad4e933a 100644
--- a/src/wb_ext_edit.ts
+++ b/src/wb_ext_edit.ts
@@ -1,6 +1,6 @@
 /*!
  * Wunderbaum - ext-edit
- * Copyright (c) 2021-2025, Martin Wendt. Released under the MIT license.
+ * Copyright (c) 2021-2026, Martin Wendt. Released under the MIT license.
  * @VERSION, @DATE (https://github.com/mar10/wunderbaum)
  */
 
@@ -15,10 +15,10 @@ import {
   isPlainObject,
   onEvent,
   ValidationError,
-} from "./util";
-import { debounce } from "./debounce";
+} from "./wb_util";
+import { debounce } from "./wb_debounce";
 import { WunderbaumNode } from "./wb_node";
-import { EditOptionsType, InsertNodeType, WbNodeData } from "./types";
+import { EditOptionsType, InsertNodeType, WbNodeData } from "./wb_types";
 
 // const START_MARKER = "\uFFF7";
 
diff --git a/src/wb_ext_filter.ts b/src/wb_ext_filter.ts
index f0374c22..6412a3aa 100644
--- a/src/wb_ext_filter.ts
+++ b/src/wb_ext_filter.ts
@@ -1,6 +1,6 @@
 /*!
  * Wunderbaum - ext-filter
- * Copyright (c) 2021-2025, Martin Wendt. Released under the MIT license.
+ * Copyright (c) 2021-2026, Martin Wendt. Released under the MIT license.
  * @VERSION, @DATE (https://github.com/mar10/wunderbaum)
  */
 
@@ -11,18 +11,18 @@ import {
   escapeRegex,
   extend,
   onEvent,
-} from "./util";
+} from "./wb_util";
 import {
   FilterConnectType,
   FilterNodesOptions,
   FilterOptionsType,
   NodeFilterCallback,
   NodeStatusType,
-} from "./types";
+} from "./wb_types";
 import { Wunderbaum } from "./wunderbaum";
 import { WunderbaumNode } from "./wb_node";
 import { WunderbaumExtension } from "./wb_extension_base";
-import { debounce } from "./debounce";
+import { debounce } from "./wb_debounce";
 
 const START_MARKER = "\uFFF7";
 const END_MARKER = "\uFFF8";
diff --git a/src/wb_ext_grid.ts b/src/wb_ext_grid.ts
index 6635c34e..01204bcb 100644
--- a/src/wb_ext_grid.ts
+++ b/src/wb_ext_grid.ts
@@ -1,14 +1,14 @@
 /*!
  * Wunderbaum - ext-grid
- * Copyright (c) 2021-2025, Martin Wendt. Released under the MIT license.
+ * Copyright (c) 2021-2026, Martin Wendt. Released under the MIT license.
  * @VERSION, @DATE (https://github.com/mar10/wunderbaum)
  */
 import { Wunderbaum } from "./wunderbaum";
 import { WunderbaumExtension } from "./wb_extension_base";
-import { DragCallbackArgType, DragObserver } from "./drag_observer";
-import { ChangeType, ColumnDefinition, GridOptionsType } from "./types";
-import { DEFAULT_MIN_COL_WIDTH } from "./common";
-import { toBool, toPixel } from "./util";
+import { DragCallbackArgType, DragObserver } from "./wb_drag_observer";
+import { ChangeType, ColumnDefinition, GridOptionsType } from "./wb_types";
+import { DEFAULT_MIN_COL_WIDTH } from "./wb_common";
+import { toBool, toPixel } from "./wb_util";
 
 export class GridExtension extends WunderbaumExtension<GridOptionsType> {
   protected observer: DragObserver;
diff --git a/src/wb_ext_keynav.ts b/src/wb_ext_keynav.ts
index 437b602a..c9aec3bf 100644
--- a/src/wb_ext_keynav.ts
+++ b/src/wb_ext_keynav.ts
@@ -1,11 +1,11 @@
 /*!
  * Wunderbaum - ext-keynav
- * Copyright (c) 2021-2025, Martin Wendt. Released under the MIT license.
+ * Copyright (c) 2021-2026, Martin Wendt. Released under the MIT license.
  * @VERSION, @DATE (https://github.com/mar10/wunderbaum)
  */
 
-import { KeynavOptionsType, NavModeEnum } from "./types";
-import { eventToString } from "./util";
+import { KeynavOptionsType, NavModeEnum } from "./wb_types";
+import { eventToString } from "./wb_util";
 import { Wunderbaum } from "./wunderbaum";
 import { WunderbaumNode } from "./wb_node";
 import { WunderbaumExtension } from "./wb_extension_base";
diff --git a/src/wb_ext_logger.ts b/src/wb_ext_logger.ts
index 0b02c530..dbf0f46d 100644
--- a/src/wb_ext_logger.ts
+++ b/src/wb_ext_logger.ts
@@ -1,11 +1,11 @@
 /*!
  * Wunderbaum - ext-logger
- * Copyright (c) 2021-2025, Martin Wendt. Released under the MIT license.
+ * Copyright (c) 2021-2026, Martin Wendt. Released under the MIT license.
  * @VERSION, @DATE (https://github.com/mar10/wunderbaum)
  */
 
-import { LoggerOptionsType } from "./types";
-import { overrideMethod } from "./util";
+import { LoggerOptionsType } from "./wb_types";
+import { overrideMethod } from "./wb_util";
 import { WunderbaumExtension } from "./wb_extension_base";
 import { Wunderbaum } from "./wunderbaum";
 
diff --git a/src/wb_extension_base.ts b/src/wb_extension_base.ts
index 7f21538a..09bae09a 100644
--- a/src/wb_extension_base.ts
+++ b/src/wb_extension_base.ts
@@ -1,10 +1,10 @@
 /*!
  * Wunderbaum - wb_extension_base
- * Copyright (c) 2021-2025, Martin Wendt. Released under the MIT license.
+ * Copyright (c) 2021-2026, Martin Wendt. Released under the MIT license.
  * @VERSION, @DATE (https://github.com/mar10/wunderbaum)
  */
 
-import * as util from "./util";
+import * as util from "./wb_util";
 import { DndExtension } from "./wb_ext_dnd";
 import { EditExtension } from "./wb_ext_edit";
 import { FilterExtension } from "./wb_ext_filter";
diff --git a/src/wb_node.ts b/src/wb_node.ts
index 2595e74e..67024cad 100644
--- a/src/wb_node.ts
+++ b/src/wb_node.ts
@@ -1,10 +1,10 @@
 /*!
  * Wunderbaum - wunderbaum_node
- * Copyright (c) 2021-2025, Martin Wendt. Released under the MIT license.
+ * Copyright (c) 2021-2026, Martin Wendt. Released under the MIT license.
  * @VERSION, @DATE (https://github.com/mar10/wunderbaum)
  */
 
-import * as util from "./util";
+import * as util from "./wb_util";
 
 import { Wunderbaum } from "./wunderbaum";
 import {
@@ -41,7 +41,7 @@ import {
   TooltipOption,
   TristateType,
   WbNodeData,
-} from "./types";
+} from "./wb_types";
 
 import {
   decompressSourceData,
@@ -54,8 +54,8 @@ import {
   TEST_FILE_PATH,
   TEST_HTML,
   TITLE_SPAN_PAD_Y,
-} from "./common";
-import { Deferred } from "./deferred";
+} from "./wb_common";
+import { Deferred } from "./wb_deferred";
 
 /** WunderbaumNode properties that can be passed with source data.
  * (Any other source properties will be stored as `node.data.PROP`.)
diff --git a/src/wb_options.ts b/src/wb_options.ts
index a4aac05f..39806bb1 100644
--- a/src/wb_options.ts
+++ b/src/wb_options.ts
@@ -1,6 +1,6 @@
 /*!
  * Wunderbaum - options
- * Copyright (c) 2021-2025, Martin Wendt. Released under the MIT license.
+ * Copyright (c) 2021-2026, Martin Wendt. Released under the MIT license.
  * @VERSION, @DATE (https://github.com/mar10/wunderbaum)
  */
 
@@ -39,7 +39,7 @@ import {
   WbRenderEventType,
   WbSelectEventType,
   WbTreeEventType,
-} from "./types";
+} from "./wb_types";
 
 /**
  * Properties of {@link wunderbaum.Wunderbaum.options}.
diff --git a/src/types.ts b/src/wb_types.ts
similarity index 99%
rename from src/types.ts
rename to src/wb_types.ts
index bea16e11..e0984bbd 100644
--- a/src/types.ts
+++ b/src/wb_types.ts
@@ -1,6 +1,6 @@
 /*!
  * Wunderbaum - types
- * Copyright (c) 2021-2025, Martin Wendt. Released under the MIT license.
+ * Copyright (c) 2021-2026, Martin Wendt. Released under the MIT license.
  * @VERSION, @DATE (https://github.com/mar10/wunderbaum)
  */
 
diff --git a/src/util.ts b/src/wb_util.ts
similarity index 99%
rename from src/util.ts
rename to src/wb_util.ts
index 9ead4e35..3c1052a6 100644
--- a/src/util.ts
+++ b/src/wb_util.ts
@@ -1,12 +1,12 @@
 /*!
  * Wunderbaum - util
- * Copyright (c) 2021-2025, Martin Wendt. Released under the MIT license.
+ * Copyright (c) 2021-2026, Martin Wendt. Released under the MIT license.
  * @VERSION, @DATE (https://github.com/mar10/wunderbaum)
  */
 
 /** @module util */
 
-import { DebouncedFunction, debounce, throttle } from "./debounce";
+import { DebouncedFunction, debounce, throttle } from "./wb_debounce";
 
 export { debounce, throttle };
 
diff --git a/src/wunderbaum.scss b/src/wunderbaum.scss
index 51250abf..5f8d00b5 100644
--- a/src/wunderbaum.scss
+++ b/src/wunderbaum.scss
@@ -1,6 +1,6 @@
 /*!
  * Wunderbaum style sheet (generated from wunderbaum.scss)
- * Copyright (c) 2021-2025, Martin Wendt. Released under the MIT license.
+ * Copyright (c) 2021-2026, Martin Wendt. Released under the MIT license.
  * @VERSION, @DATE (https://github.com/mar10/wunderbaum)
  */
 // @use "sass:meta";
diff --git a/src/wunderbaum.ts b/src/wunderbaum.ts
index bae1fe48..a676e961 100644
--- a/src/wunderbaum.ts
+++ b/src/wunderbaum.ts
@@ -3,7 +3,7 @@
  *
  * A treegrid control.
  *
- * Copyright (c) 2021-2025, Martin Wendt (https://wwWendt.de).
+ * Copyright (c) 2021-2026, Martin Wendt (https://wwWendt.de).
  * https://github.com/mar10/wunderbaum
  *
  * Released under the MIT license.
@@ -12,7 +12,7 @@
  */
 
 // import "./wunderbaum.scss";
-import * as util from "./util";
+import * as util from "./wb_util";
 import { FilterExtension } from "./wb_ext_filter";
 import { KeynavExtension } from "./wb_ext_keynav";
 import { LoggerExtension } from "./wb_ext_logger";
@@ -61,7 +61,7 @@ import {
   SortByPropertyOptions,
   ReloadOptions,
   LoadLazyNodesOptions,
-} from "./types";
+} from "./wb_types";
 import {
   DEFAULT_DEBUGLEVEL,
   defaultIconMaps,
@@ -71,12 +71,12 @@ import {
   DEFAULT_ROW_HEIGHT,
   TEST_FILE_PATH,
   TEST_HTML,
-} from "./common";
+} from "./wb_common";
 import { WunderbaumNode } from "./wb_node";
-import { Deferred } from "./deferred";
+import { Deferred } from "./wb_deferred";
 import { EditExtension } from "./wb_ext_edit";
 import { InitWunderbaumOptions, WunderbaumOptions } from "./wb_options";
-import { DebouncedFunction } from "./debounce";
+import { DebouncedFunction } from "./wb_debounce";
 
 class WbSystemRoot extends WunderbaumNode {
   constructor(tree: Wunderbaum) {
@@ -161,7 +161,7 @@ export class Wunderbaum {
 
   /** A Promise that is resolved when the tree was initialized (similar to `init(e)` event). */
   public readonly ready: Promise<any>;
-  /** Expose some useful methods of the util.ts module as `Wunderbaum.util`. */
+  /** Expose some useful methods of the wb_util.ts module as `Wunderbaum.util`. */
   public static util = util;
   /** A map of default iconMaps.
    * May be used as default, when passing partial icon definition maps:
@@ -175,7 +175,7 @@ export class Wunderbaum {
    * ```
    */
   public static iconMaps = defaultIconMaps;
-  /** Expose some useful methods of the util.ts module as `tree._util`. */
+  /** Expose some useful methods of the wb_util.ts module as `tree._util`. */
   public _util = util;
 
   // --- SELECT ---
diff --git a/test/unit/test-core-fixture1.js b/test/unit/test-core-fixture1.js
index 1c14dba3..0409c8aa 100644
--- a/test/unit/test-core-fixture1.js
+++ b/test/unit/test-core-fixture1.js
@@ -1,6 +1,6 @@
 /*!
  * Wunderbaum - Unit Test
- * Copyright (c) 2021-2025, Martin Wendt. Released under the MIT license.
+ * Copyright (c) 2021-2026, Martin Wendt. Released under the MIT license.
  * @VERSION, @DATE (https://github.com/mar10/wunderbaum)
  */
 
diff --git a/test/unit/test-core.js b/test/unit/test-core.js
index fdca2c80..1c2aa3ce 100644
--- a/test/unit/test-core.js
+++ b/test/unit/test-core.js
@@ -1,6 +1,6 @@
 /*!
  * Wunderbaum - Unit Test
- * Copyright (c) 2021-2025, Martin Wendt. Released under the MIT license.
+ * Copyright (c) 2021-2026, Martin Wendt. Released under the MIT license.
  * @VERSION, @DATE (https://github.com/mar10/wunderbaum)
  */
 /* global mar10, QUnit */
diff --git a/tsconfig.json b/tsconfig.json
index e26ba415..26bc9a76 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -2,7 +2,7 @@
   "compilerOptions": {
     /* Basic Options */
     // "incremental": true,                   /* Enable incremental compilation */
-    "target": "ES2019" /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017', 'ES2018', 'ES2019', 'ES2020', or 'ESNEXT'. */,
+    "target": "ES2020" /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017', 'ES2018', 'ES2019', 'ES2020', or 'ESNEXT'. */,
     "module": "esnext" /* Specify module code generation: 'none', 'commonjs', 'amd', 'system', 'umd', 'es2015', 'es2020', or 'ESNext'. */,
     // "lib": [],                             /* Specify library files to be included in the compilation. */
     // "allowJs": true,                       /* Allow javascript files to be compiled. */
@@ -36,7 +36,7 @@
     // "noImplicitReturns": true /* Report error when not all code paths in function return a value. */,
     // "noFallthroughCasesInSwitch": true /* Report errors for fallthrough cases in switch statement. */,
     /* Module Resolution Options */
-    "moduleResolution": "node" /* Specify module resolution strategy: 'node' (Node.js) or 'classic' (TypeScript pre-1.6). */,
+    "moduleResolution": "bundler" /* Specify module resolution strategy: 'node' (Node.js) or 'classic' (TypeScript pre-1.6). */,
     // "baseUrl": "./",                       /* Base directory to resolve non-absolute module names. */
     // "paths": {},                           /* A series of entries which re-map imports to lookup locations relative to the 'baseUrl'. */
     // "rootDirs": [],                        /* List of root folders whose combined content represents the structure of the project at runtime. */
@@ -72,9 +72,9 @@
       "src/wunderbaum.ts",
       "src/wb_node.ts",
       "src/wb_options.ts",
-      "src/common.ts",
-      "src/types.ts",
-      "src/util.ts"
+      "src/wb_common.ts",
+      "src/wb_types.ts",
+      "src/wb_util.ts"
     ],
     "out": "docs/api",
     "excludePrivate": true,
diff --git a/typedoc.json b/typedoc.json
index c3dad146..d5adddcf 100644
--- a/typedoc.json
+++ b/typedoc.json
@@ -1,9 +1,9 @@
 {
   "intentionallyNotExported": [
-    "src/debounce.ts:DebouncedFunction",
-    "src/debounce.ts:DebounceOptions",
-    "src/debounce.ts:ThrottleOptions",
-    "src/debounce.ts:Procedure"
-    // "src/debounce.ts"
+    "src/wb_debounce.ts:DebouncedFunction",
+    "src/wb_debounce.ts:DebounceOptions",
+    "src/wb_debounce.ts:ThrottleOptions",
+    "src/wb_debounce.ts:Procedure"
+    // "src/wb_debounce.ts"
   ]
 }