index.ts

/**
 * Class method decorator for counting the number of calls
 * @param originalMethod
 * @param context
 * @returns Decorator function
 */
export const Counter = (
	originalMethod: Function,
	context: ClassMethodDecoratorContext
) => {
	const methodName = String(context.name);

	let count = 0;
	function ReplacementMethod(this: any, ...args: any[]) {
		count++;
		console.log(`${methodName} called ${count}x`);
		return originalMethod.call(this, ...args);
	}
	return ReplacementMethod;
};