我试着使用
Math.round
来保留小数点后两位,但它并没有按照我想要的方式工作。我错在哪里了?$(document).ready(function() {
var totalPrice = 0;
$('.food').click(function() {
var $frm = $(this).parent();
var toAdd = $frm.children(".productInput").val();
var addPrice = parseFloat($frm.children(".priceInput").val());
var addAmount = parseFloat($frm.children(".amountInput").val());
if ($('.priceInput').val() == '') {
alert('Price can not be left blank');
};
if ($('.amountInput').val() == '') {
alert('Amount can not be left blank');
} else {
var div = $("<div>");
div.append("<p class='amount'>" + addAmount + "</p>", "<p class='product'> " + toAdd + " </p>", "<p class='price'>" + addPrice + "</p>", "<p class='delete'>" + "X" + "</p>");
$frm.parent().children(".messages").append(div);
totalPrice += addAmount * addPrice;
$(".totalPrice").text("Total Price: $" + totalPrice);
}
console.log(addAmount);
console.log(addPrice);
});
$(document).on("click", ".delete", function() {
/* var subAmount = parseFloat($(this).siblings(".amount").text());
var subPrice = parseFloat($(this).siblings(".price").text());
totalPrice -= subAmount * subPrice;
$(".totalPrice").text("Total Price: $" + totalPrice);*/
$(this).closest("div").remove();
console.log(subPrice);
console.log(subAmount);
});
$(document).on("mouseover", ".delete", function() {
var hoverAmount = parseFloat($(this).siblings(".amount").text());
var hoverPrice = parseFloat($(this).siblings(".price").text());
totalPrice -= hoverAmount * hoverPrice;
Math.round(totalPrice * 100) / 100
$(".totalPrice").text("Total Price: $" + totalPrice);
$(this).closest("div").fadeTo("fast", 0.4);
});
$(document).on("mouseout", ".delete", function() {
var subAmount = parseFloat($(this).siblings(".amount").text());
var subPrice = parseFloat($(this).siblings(".price").text());
totalPrice += subAmount * subPrice;
Math.round(totalPrice * 100) / 100
$(".totalPrice").text("Total Price: $" + totalPrice);
$(this).closest("div").fadeTo("fast", 1.0);
})
});
因为我正在使用浮点数,有时数字会变成长小数而不是精确的数字。我试图通过使用Math.round来避免这个问题。如果有其他解决方案,将不胜感激。
totalPrice.toFixed(2)
可以将totalPrice
的值保留两位小数。 - Jonathan Lonowski