Increment/Decrement Button

buttons

<input type="text" name="${FormLi.quantity.htmlName}" size="2" maxlength="6" value="<isprint value="${lineItem.quantity}"/>" data-pid="${lineItem.productID}" class="inputbox quantityinput positivenumber" />
<iscomment>Plus and Minus button functionality</iscomment>
<isif condition="${lineItem.quantity > 0}">
	<button class="plus quantitybtn" data-pid="${lineItem.productID}">Plus</button>
	<button class="minus quantitybtn" data-pid="${lineItem.productID}">Minus</button>
	
</isif>

increment-decrement

jQuery(".cart .quantitybtn").click(function(){
	var productID = jQuery(this).attr("data-pid");
	var inputField = jQuery(".cart .quantitycolumn input[data-pid=" + productID + "]");
	var oldValue = inputField.val();
	if(jQuery(this).hasClass("plus")){
		var newValue = oldValue < app.cart.maxNumber ? parseInt(oldValue) + 1 : oldValue;
	} else {
		var newValue = oldValue > app.cart.minNumber ? parseInt(oldValue) - 1 : oldValue;
	}
	//Set the new value and trigger a change
	inputField.val(newValue);
	if(newValue !== oldValue){
		inputField.trigger("change");
	}
	return false;
});

jQuery(".cart .quantityinput").change(function(){
	console.log("changed");
});