Rewrite ckeditor5-word-count to TypeScript.

.gitignore

@@ -44,6 +44,7 @@ packages/ckeditor5-editor-inline/src/**/*.js
 packages/ckeditor5-editor-balloon/src/**/*.js
 packages/ckeditor5-editor-decoupled/src/**/*.js
 packages/ckeditor5-essentials/src/**/*.js
+packages/ckeditor5-word-count/src/**/*.js
 packages/*/src/**/*.d.ts
 src/**/*.js
 src/**/*.d.ts

packages/ckeditor5-engine/src/index.ts

@@ -42,6 +42,7 @@ export { default as DocumentFragment } from './model/documentfragment';
 export { default as History } from './model/history';
 export { default as Text } from './model/text';
 export type { default as Batch } from './model/batch';
+export type { default as Item } from './model/item';
 export type { default as Node } from './model/node';
 export type { default as Schema } from './model/schema';
 export type { default as Selection } from './model/selection';

packages/ckeditor5-word-count/package.json

@@ -10,7 +10,7 @@
     "ckeditor5-plugin",
     "ckeditor5-dll"
   ],
-  "main": "src/index.js",
+  "main": "src/index.ts",
   "dependencies": {
     "lodash-es": "^4.17.15",
     "ckeditor5": "^35.3.2"
@@ -30,6 +30,7 @@
     "@ckeditor/ckeditor5-table": "^35.3.2",
     "@ckeditor/ckeditor5-theme-lark": "^35.3.2",
     "@ckeditor/ckeditor5-utils": "^35.3.2",
+    "typescript": "^4.8.4",
     "webpack": "^5.58.1",
     "webpack-cli": "^4.9.0"
   },
@@ -48,13 +49,16 @@
   },
   "files": [
     "lang",
-    "src",
+    "src/**/*.js",
+    "src/**/*.d.ts",
     "theme",
     "build",
     "ckeditor5-metadata.json",
     "CHANGELOG.md"
   ],
   "scripts": {
-    "dll:build": "webpack"
+    "dll:build": "webpack",
+    "build": "tsc -p ./tsconfig.release.json",
+    "postversion": "npm run build"
   }
 }

packages/ckeditor5-word-count/src/index.js → packages/ckeditor5-word-count/src/index.ts

@@ -7,4 +7,4 @@
  * @module word-count
  */
 
-export { default as WordCount } from './wordcount';
+export { default as WordCount, type WordCountUpdateEvent } from './wordcount';

packages/ckeditor5-word-count/src/utils.js → packages/ckeditor5-word-count/src/utils.ts

@@ -7,17 +7,19 @@
  * @module word-count/utils
  */
 
+import type { Element, Item } from 'ckeditor5/src/engine';
+
 /**
  * Returns a plain text representation of an element and its children.
  *
- * @param {module:engine/model/element~Element} element
- * @returns {String} Plain text representing the model's data.
+ * @returns Plain text representing the model's data.
  */
-export function modelElementToPlainText( element ) {
-	if ( element.is( '$text' ) || element.is( '$textProxy' ) ) {
-		return element.data;
+export function modelElementToPlainText( item: Item ): string {
+	if ( item.is( '$text' ) || item.is( '$textProxy' ) ) {
+		return item.data;
 	}
 
+	const element = item as Element;
 	let text = '';
 	let prev = null;