[13Foch]

let a = function (b) {
			document.querySelector(b).addEventListener("click", function (event) {
				let target = event.target;
				if (target = target.closest(".menu__name")) {
					event.preventDefault();
					let parent = target.parentNode;
					let children = parent.parentNode.children;
					[...children].forEach(el => el.classList[el === parent ? "toggle" : "remove"]("menu__item--active"))
				}
			});
		}
		a('.menu');

а так более правильно ?