2 Way Binding with Vanilla JavaScript

bind.js

function bind(items, event) {
	items.forEach(item => {
		item.addEventListener(event, e => {
			items.forEach(otherItem => {
				otherItem.value = e.target.value;
				otherItem.innerHTML = e.target.value;
			});
		});
	});
}

// Pass in items as and array of DOM elements that you want to bind together.