feat: refactoring project

node_modules/webpack/lib/AbstractMethodError.js

@@ -13,18 +13,22 @@ const CURRENT_METHOD_REGEXP = /at ([a-zA-Z0-9_.]*)/;
  * @returns {string} message
  */
 function createMessage(method) {
-	return `Abstract method${method ? " " + method : ""}. Must be overridden.`;
+	return `Abstract method${method ? ` ${method}` : ""}. Must be overridden.`;
 }
 
 /**
  * @constructor
  */
 function Message() {
-	/** @type {string} */
+	/** @type {string | undefined} */
 	this.stack = undefined;
 	Error.captureStackTrace(this);
-	/** @type {RegExpMatchArray} */
-	const match = this.stack.split("\n")[3].match(CURRENT_METHOD_REGEXP);
+	/** @type {RegExpMatchArray | null} */
+	const match =
+		/** @type {string} */
+		(/** @type {unknown} */ (this.stack))
+			.split("\n")[3]
+			.match(CURRENT_METHOD_REGEXP);
 
 	this.message = match && match[1] ? createMessage(match[1]) : createMessage();
 }
@@ -32,12 +36,13 @@ function Message() {
 /**
  * Error for abstract method
  * @example
+ * ```js
  * class FooClass {
  *     abstractMethod() {
  *         throw new AbstractMethodError(); // error message: Abstract method FooClass.abstractMethod. Must be overridden.
  *     }
  * }
- *
+ * ```
  */
 class AbstractMethodError extends WebpackError {
 	constructor() {