Question

将本地存储的定价添加到其他字段时遇到问题。如果我将beforeNoonNPSlot的价格设置为2，但我将该字段留空matineeNPSlot（它应保留最后分配给它的价格）。然后我更新更改后。 beforeNoonPrice应该是$2.00，但matineeNPSlot是$NaN。另外，如果我为beforeNoonNPSlot设置价格并为matineeNPSlot设置价格，那么就不存在NaN问题。

我希望它是可选的，可以为任何字段设置价格，不一定是所有字段而不会出现此问题。如何防止这种情况发生？

function updatePricingFunction() {
    var beforeNoonFieldChange = document.getElementById('beforeNoonNPSlot').value;
    var matineeFieldChange = document.getElementById('matineeNPSlot').value;

    localStorage.setItem('text', beforeNoonFieldChange);
    localStorage.setItem('text1', matineeFieldChange);
 }

function load() {
    var storedValue = localStorage.getItem('text');
    var storedValue1 = localStorage.getItem('text1');

    beforenoonprice = storedValue;
    matineeprice = storedValue1;
    beforeNoonCPSlot.innerHTML = "$" + parseFloat(storedValue).toFixed(2);
    $("#beforeNoonPrice").attr = parseFloat(storedValue).toFixed(2);

    $('#beforeNoonPrice').append("$" + (storedValue * 1).toFixed(2));

    matineeCPSlot.innerHTML = "$" + parseFloat(storedValue1).toFixed(2);
    $("#matineePrice").attr = parseFloat(storedValue1).toFixed(2);

    $('#matineePrice').append("$" + (storedValue1 * 1).toFixed(2));
}



// JavaScript Document
var beforenoonprice = 6.75; // CHANGE THE PRICE OF THE BEFORE NOON TICKET
var matineeprice = 9.00; // CHANGE THE PRICE OF THE MATINEE TICKET
var seniorprice = 9.25; // CHANGE THE PRICE OF THE SENIOR TICKET
var militaryprice = 9.25; // CHANGE THE PRICE OF THE MILITARY TICKET
var studentdayprice = 8.00; // CHANGE THE PRICE OF THE STUDENT DAY TICKET
var seniordayprice = 6.75; // CHANGE THE PRICE OF THE SENIOR DAY TICKET
 var adultprice = 10.75; // CHANGE THE PRICE OF THE ADULT TICKET
var childprice = 8.00; // CHANGE THE PRICE OF THE CHILD TICKET
var threeDprice = 3.50; // CHANGE THE PRICE OF THE REGULAR 3D PRICE
var imaxPrice = 4.50; // CHANGE THE PRICE OF THE IMAX TICKET
var imax3dPrice = 5.50; // CHANGE THE PRICE OF THE IMAX 3D TICKET
var output = document.getElementById('output');

Answer 1

您正在尝试解析一个空字符串，因此您正在尝试解析空字符串，因此要么在代码中添加一个特殊情况，在格式化之前检查字符串是否为空（默认为[not]设置]或者其他东西），或者你将0设置为默认值，这样可以将其解析回来，你得到0美元，有意义吗？

localStorage项目与其他localStorage项目冲突

1 个答案: