CoreMedia · pkliesch · Oct 23, 2025 · Sep 29, 2025 · Sep 29, 2025 · Sep 29, 2025
diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
@@ -145,7 +145,7 @@ jobs:
         env:
           CKEDITOR_LICENSE_KEY: ${{ secrets.CKEDITOR_LICENSE }}
         run: |
-          pnpm jest
+          pnpm test
       - id: itest
         if: ${{ inputs.itest }}
         name: "Integration Tests"

diff --git a/.github/workflows/pre-release.yml b/.github/workflows/pre-release.yml
@@ -18,6 +18,7 @@ env:
   NODE_OPTIONS: "--max_old_space_size=4096"
   PNPM_VERSION: ^10.9
   NPM_CONFIG_@coremedia:registry: 'https://npm.coremedia.io'
+  NPM_CONFIG_@coremedia-internal:registry: 'https://npm.coremedia.io'
 
 jobs:
   build:
@@ -83,7 +84,7 @@ jobs:
       - name: Test
         env:
           CKEDITOR_LICENSE_KEY: ${{ secrets.CKEDITOR_LICENSE }}
-        run: pnpm jest
+        run: pnpm test
       - name: Playwright Tests
         run: pnpm playwright
       - name: TypeDoc

diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
@@ -126,7 +126,7 @@ jobs:
       - name: Test
         env:
           CKEDITOR_LICENSE_KEY: ${{ secrets.CKEDITOR_LICENSE }}
-        run: pnpm jest
+        run: pnpm test
       - name: Playwright Tests
         run: pnpm playwright
       - name: TypeDoc

diff --git a/DEVELOPMENT.md b/DEVELOPMENT.md
@@ -27,7 +27,7 @@ CKEDITOR_LICENSE_KEY=<your-license-key>
 To run tests use:
 
 ```text
-pnpm run jest
+pnpm run test
 ```
 
 ## Update Process

diff --git a/README.md b/README.md
@@ -84,7 +84,6 @@ workspace usage, are not published and have scope `@coremedia-internal/`.
 | [`ckeditor5-dom-converter`][]                     | Base architecture for data-processing                                      |
 | [`ckeditor5-dom-support`][]                       | Utilities for handling DOM objects                                         |
 | [`ckeditor5-font-mapper`][]                       | Replaces characters in given font to alternative representation on paste   |
-| [`ckeditor5-jest-test-helpers`][]                 | Support for JEST tests                                                     |
 | [`ckeditor5-link-common`][]                       | Assistive Utilities for `@ckeditor/ckeditor5-link`                         |
 | [`ckeditor5-logging`][]                           | Logging Facade                                                             |
 
@@ -226,8 +225,6 @@ implements the described behavior.
 
 [`ckeditor5-font-mapper`]: <./packages/ckeditor5-font-mapper> "@coremedia/ckeditor5-font-mapper"
 
-[`ckeditor5-jest-test-helpers`]: <./packages/ckeditor5-jest-test-helpers> "@coremedia-internal/ckeditor5-jest-test-helpers"
-
 [`ckeditor5-link-common`]: <./packages/ckeditor5-link-common> "@coremedia/ckeditor5-link-common"
 
 [`ckeditor5-logging`]: <./packages/ckeditor5-logging> "@coremedia/ckeditor5-logging"

diff --git a/app/package.json b/app/package.json
@@ -2,14 +2,15 @@
   "name": "@coremedia/ckeditor5-app",
   "description": "A custom CKEditor 5 build made by the CKEditor 5 online builder.",
   "version": "25.0.4-rc.4",
+  "type": "module",
   "author": {
     "name": "CoreMedia GmbH",
     "email": "info@coremedia.com",
     "url": "https://coremedia.com/",
     "avatar": "data:image/svg+xml;base64,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"
   },
   "engines": {
-    "node": "22",
+    "node": "^22.3.0",
     "pnpm": "^10.9"
   },
   "license": "Apache-2.0",
@@ -31,13 +32,12 @@
     "@coremedia/ckeditor5-dom-converter": "25.0.4-rc.4",
     "@coremedia/ckeditor5-font-mapper": "25.0.4-rc.4",
     "@coremedia/ckeditor5-link-common": "25.0.4-rc.4",
-    "@coremedia/service-agent": "^1.1.5",
-    "ckeditor5": "45.2.1",
+    "@coremedia/service-agent": "^2.1.2",
+    "ckeditor5": "46.1.1",
     "xml-formatter": "^3.6.2"
   },
   "devDependencies": {
     "@babel/core": "^7.25.2",
-    "source-map-loader": "^1.0.0",
     "@babel/plugin-transform-runtime": "^7.25.4",
     "@ckeditor/ckeditor5-dev-translations": "^45.0.8",
     "@ckeditor/ckeditor5-dev-utils": "^45.0.8",
@@ -54,18 +54,19 @@
     "postcss-loader": "^8.1.1",
     "raw-loader": "^4.0.2",
     "rimraf": "^6.0.1",
+    "source-map-loader": "^1.0.0",
     "style-loader": "^4.0.0",
     "terser-webpack-plugin": "^5.3.10",
     "typescript": "5.4.5",
-    "webpack": "^5.93.0",
-    "webpack-cli": "^5.1.4"
+    "webpack": "^5.101.3",
+    "webpack-cli": "^6.0.1"
   },
   "scripts": {
     "clean": "pnpm clean:src && pnpm clean:dist",
     "clean:src": "rimraf --glob \"src/**/*.@(js|js.map|d.ts|d.ts.map)\"",
     "clean:dist": "rimraf ./dist",
     "build": "webpack --mode production --stats-error-details",
-    "lint": "eslint \"**/*.{js,cjs,mjs,ts,tsx}\"",
+    "lint": "eslint \"**/*.{ts,tsx}\"",
     "npm-check-updates": "npm-check-updates --upgrade",
     "start": "http-server . --port 0 -d false -o sample"
   }

diff --git a/app/src/CKEditorInstanceFactory.ts b/app/src/CKEditorInstanceFactory.ts
@@ -1,4 +1,4 @@
-import { ClassicEditor } from "ckeditor5";
-import { ApplicationState } from "./ApplicationState";
+import type { ClassicEditor } from "ckeditor5";
+import type { ApplicationState } from "./ApplicationState";
 
 export type CKEditorInstanceFactory = (sourceElement: HTMLElement, state: ApplicationState) => Promise<ClassicEditor>;
diff --git a/app/src/DataTypeSwitch.ts b/app/src/DataTypeSwitch.ts
@@ -1,4 +1,5 @@
-import { SwitchButton, SwitchButtonConfig } from "./SwitchButton";
+import type { SwitchButtonConfig } from "./SwitchButton";
+import { SwitchButton } from "./SwitchButton";
 
 export const dataTypes = {
   ["richtext" as const]: "Rich Text",

diff --git a/app/src/PreviewSwitch.ts b/app/src/PreviewSwitch.ts
@@ -1,4 +1,5 @@
-import { SwitchButton, SwitchButtonConfig } from "./SwitchButton";
+import type { SwitchButtonConfig } from "./SwitchButton";
+import { SwitchButton } from "./SwitchButton";
 
 export const previewStates = {
   ["hidden" as const]: "Hidden",

diff --git a/app/src/ReadOnlySwitch.ts b/app/src/ReadOnlySwitch.ts
@@ -1,4 +1,5 @@
-import { SwitchButton, SwitchButtonConfig } from "./SwitchButton";
+import type { SwitchButtonConfig } from "./SwitchButton";
+import { SwitchButton } from "./SwitchButton";
 
 export const readOnlyStates = {
   ["rw" as const]: "Read Write",

diff --git a/app/src/SwitchButton.ts b/app/src/SwitchButton.ts
@@ -1,4 +1,5 @@
-import { ApplicationToolbarConfig, requireApplicationToolbar } from "./ApplicationToolbar";
+import type { ApplicationToolbarConfig } from "./ApplicationToolbar";
+import { requireApplicationToolbar } from "./ApplicationToolbar";
 
 export interface SwitchButtonConfig<T extends string = string> extends ApplicationToolbarConfig {
   id?: string;

diff --git a/app/src/UiLanguageSwitch.ts b/app/src/UiLanguageSwitch.ts
@@ -1,4 +1,5 @@
-import { SwitchButton, SwitchButtonConfig } from "./SwitchButton";
+import type { SwitchButtonConfig } from "./SwitchButton";
+import { SwitchButton } from "./SwitchButton";
 
 export const uiLanguages = {
   ["en" as const]: "English",

diff --git a/app/src/createCKEditorInstance.ts b/app/src/createCKEditorInstance.ts
@@ -1,7 +1,7 @@
-import { ClassicEditor, Command, Editor } from "ckeditor5";
+import type { ClassicEditor, Command, Editor } from "ckeditor5";
 import { Differencing } from "@coremedia/ckeditor5-coremedia-differencing";
-import { ApplicationState } from "./ApplicationState";
-import { CKEditorInstanceFactory } from "./CKEditorInstanceFactory";
+import type { ApplicationState } from "./ApplicationState";
+import type { CKEditorInstanceFactory } from "./CKEditorInstanceFactory";
 import { initReadOnlyToggle } from "./ReadOnlySwitch";
 import { initPreview, updatePreview } from "./preview";
 import { createRichTextEditor } from "./editors/richtext";

diff --git a/app/src/editors/bbCode.ts b/app/src/editors/bbCode.ts
@@ -35,8 +35,8 @@ import {
   ImageBlockEditing,
 } from "ckeditor5";
 import { updatePreview } from "../preview";
-import { ApplicationState } from "../ApplicationState";
-import { CKEditorInstanceFactory } from "../CKEditorInstanceFactory";
+import type { ApplicationState } from "../ApplicationState";
+import type { CKEditorInstanceFactory } from "../CKEditorInstanceFactory";
 
 const licenseKeyErrorMessage =
   "Please provide a valid license key for your CKEditor5 instance. Please create a .env file in the workspace root and make your license as CKEDITOR_LICENSE_KEY variable. Please use 'GPL' if you want to use the GNU General Public License.";

diff --git a/app/src/editors/richtext.ts b/app/src/editors/richtext.ts
@@ -23,6 +23,7 @@ import {
   CoreMediaStudioEssentials,
   Strictness,
 } from "@coremedia/ckeditor5-coremedia-studio-essentials";
+import type { PluginConstructor } from "ckeditor5";
 import {
   Alignment,
   Autoformat,
@@ -53,7 +54,6 @@ import {
   List,
   Paragraph,
   PasteFromOffice,
-  PluginConstructor,
   RemoveFormat,
   SourceEditing,
   Strikethrough,
@@ -63,7 +63,7 @@ import {
   TableToolbar,
   Underline,
 } from "ckeditor5";
-import { RuleConfig } from "@coremedia/ckeditor5-dom-converter";
+import type { RuleConfig } from "@coremedia/ckeditor5-dom-converter";
 import type {
   LatestCoreMediaRichTextConfig,
   V10CoreMediaRichTextConfig,
@@ -74,13 +74,14 @@ import {
   stripFixedAttributes,
 } from "@coremedia/ckeditor5-coremedia-richtext";
 import "ckeditor5/ckeditor5.css";
-import { FilterRuleSetConfiguration } from "@coremedia/ckeditor5-dataprocessor-support";
-import { LinkAttributes, LinkAttributesConfig } from "@coremedia/ckeditor5-link-common";
+import type { FilterRuleSetConfiguration } from "@coremedia/ckeditor5-dataprocessor-support";
+import type { LinkAttributesConfig } from "@coremedia/ckeditor5-link-common";
+import { LinkAttributes } from "@coremedia/ckeditor5-link-common";
 import { Differencing } from "@coremedia/ckeditor5-coremedia-differencing";
 import { Blocklist } from "@coremedia/ckeditor5-coremedia-blocklist";
 import { DataFacade } from "@coremedia/ckeditor5-data-facade";
-import { CKEditorInstanceFactory } from "../CKEditorInstanceFactory";
-import { ApplicationState } from "../ApplicationState";
+import type { CKEditorInstanceFactory } from "../CKEditorInstanceFactory";
+import type { ApplicationState } from "../ApplicationState";
 import { getHashParam } from "../HashParams";
 import { initInputExampleContent } from "../inputExampleContents";
 import { updatePreview } from "../preview";

diff --git a/app/src/example-data.ts b/app/src/example-data.ts
@@ -1,12 +1,9 @@
 // noinspection HttpUrlsUsage
 import { PREDEFINED_MOCK_LINK_DATA } from "@coremedia/ckeditor5-coremedia-studio-integration-mock";
-import {
-  bbCodeData,
-  ExampleData,
-  initExamples,
-  richTextData,
-} from "@coremedia-internal/ckeditor5-coremedia-example-data";
-import { EditingView, Editor } from "ckeditor5";
+import type { ExampleData } from "@coremedia-internal/ckeditor5-coremedia-example-data";
+import { bbCodeData, initExamples, richTextData } from "@coremedia-internal/ckeditor5-coremedia-example-data";
+import type { Editor } from "ckeditor5";
+import { EditingView } from "ckeditor5";
 import { DataFacade } from "@coremedia/ckeditor5-data-facade";
 
 const exampleData: {

diff --git a/app/src/inputExampleContents.ts b/app/src/inputExampleContents.ts
@@ -1,9 +1,6 @@
-import {
-  MockContentPlugin,
-  MockInputExamplePlugin,
-  InputExampleElement,
-} from "@coremedia/ckeditor5-coremedia-studio-integration-mock";
-import { ClassicEditor } from "ckeditor5";
+import type { InputExampleElement } from "@coremedia/ckeditor5-coremedia-studio-integration-mock";
+import { MockContentPlugin, MockInputExamplePlugin } from "@coremedia/ckeditor5-coremedia-studio-integration-mock";
+import type { ClassicEditor } from "ckeditor5";
 
 const INPUT_EXAMPLE_CONTENT_DIV_CLASS = "inputExampleContentDiv";
 const initInputExampleContent = (editor: ClassicEditor) => {

diff --git a/app/src/preview.ts b/app/src/preview.ts
@@ -1,6 +1,6 @@
 import { dataFormatter } from "./DataFormatter";
 import { initPreviewSwitch } from "./PreviewSwitch";
-import { ApplicationState } from "./ApplicationState";
+import type { ApplicationState } from "./ApplicationState";
 
 const previewToggleButtonId = "previewToggle";
 const withPreviewClass = "with-preview";

diff --git a/app/webpack.config.mjs → app/webpack.config.js b/app/webpack.config.mjs → app/webpack.config.js
@@ -1,18 +1,19 @@
-"use strict";
-
 /* eslint-env node */
 
-const { default: path } = await import("path");
-const { default: webpack } = await import("webpack");
-const { bundler, loaders } = await import("@ckeditor/ckeditor5-dev-utils");
-const { CKEditorTranslationsPlugin } = await import("@ckeditor/ckeditor5-dev-translations");
-const { default: TerserPlugin } = await import("terser-webpack-plugin");
-const { default: CircularDependencyPlugin } = await import("circular-dependency-plugin");
+import path from "path";
+import webpack from "webpack";
+import { bundler, loaders } from "@ckeditor/ckeditor5-dev-utils";
+import { CKEditorTranslationsPlugin } from "@ckeditor/ckeditor5-dev-translations";
+import TerserPlugin from "terser-webpack-plugin";
+import CircularDependencyPlugin from "circular-dependency-plugin";
 import fs from "fs";
 import { fileURLToPath } from "url";
 import dotenv from "dotenv";
 
-function findEnvFile(startDir = import.meta.dirname) {
+const filename = fileURLToPath(import.meta.url);
+const dirname = path.dirname(filename);
+
+function findEnvFile(startDir = dirname) {
   let dir = startDir;
   let nothingFound = false;
   while (!nothingFound) {
@@ -39,9 +40,6 @@ if (!envPath) {
 
 dotenv.config({ path: envPath });
 
-const filename = fileURLToPath(import.meta.url);
-const dirname = path.dirname(filename);
-
 export default {
   devtool: "source-map",
   performance: { hints: false },
@@ -51,7 +49,6 @@ export default {
   output: {
     // The name under which the editor will be exported.
     library: "ClassicEditor",
-
     path: path.resolve(dirname, "dist"),
     filename: "ckeditor.js",
     libraryTarget: "umd",
@@ -103,10 +100,20 @@ export default {
         enforce: "pre",
         use: ["source-map-loader"],
       },
+      {
+        test: /\.m?js$/,
+        resolve: {
+          fullySpecified: false,
+        },
+      },
     ],
   },
 
   resolve: {
     extensions: [".ts", ".js", ".json"],
+    extensionAlias: {
+      ".js": [".js", ".ts"],
+    },
+    fullySpecified: false,
   },
 };
diff --git a/itest/jest.config.cjs b/itest/jest.config.cjs
@@ -1,7 +1,6 @@
-const jestConfig = require("@coremedia-internal/ckeditor5-jest-test-helpers/shared-jest.config.js");
+const babelConfig = require("@coremedia-internal/ckeditor5-babel-config");
 
 module.exports = {
-  ...jestConfig,
   roots: ["<rootDir>/src/"],
   // The default timeout is 5000. This may be not enough for Jest Playwright
   // tests. If the test fails due to test-timeout, we will only get unspecific
@@ -11,4 +10,26 @@ module.exports = {
   // Override from shared config.
   testEnvironment: require.resolve("jest-playwright-preset"),
   setupFilesAfterEnv: [require.resolve("expect-playwright")],
+  // Don't detect utility files as tests, i.e. require `test` in name.
+  testMatch: ["**/?(*.)+(test).[jt]s?(x)"],
+  moduleFileExtensions: ["js", "ts", "d.ts"],
+  moduleNameMapper: {
+    // https://www.npmjs.com/package/jest-transform-stub
+    "^.+\\.(css|less|sass|scss|gif|png|jpg|ttf|eot|woff|woff2|svg)$": require.resolve("jest-transform-stub"),
+  },
+  transform: {
+    // '^.+\\.[tj]sx?$' to process js/ts with `ts-jest`
+    // '^.+\\.m?[tj]sx?$' to process js/ts/mjs/mts with `ts-jest`
+    "^.+\\.tsx?$": [
+      "ts-jest",
+      {
+        // ts-jest configuration goes here
+      },
+    ],
+    // Required, e.g., for CKEditor 5 Dependencies.
+    "^.+\\.jsx?$": [require.resolve("babel-jest"), babelConfig],
+    // https://www.npmjs.com/package/jest-transform-stub
+    "^.+\\.(css|less|sass|scss|gif|png|jpg|ttf|eot|woff|woff2|svg)$": require.resolve("jest-transform-stub"),
+  },
+  transformIgnorePatterns: ["node_modules/.pnpm/(?!@ckeditor|@bbob|lodash-es|rxjs|ckeditor5|vanilla-colorful)"],
 };