For Each What?

itemsArray.forEach( function(item) {
	console.log("item: ", item);
});

itemsArray.forEach( function(currentItem, indexOfCurrentArray, fullArray) {
	console.log(currentItem, indexOfCurrentArray, fullArray);
});

//

function renderItem(item, index) {
	console.log(index, item);
}

itemsArray.forEach(renderItem); // consider that!