Knockout.js 正在将数字转换为字符串

Question

我正在尝试做一个简单的 Timesheet 演示，但我的计算观察值有一些问题，它坚持将我的数字转换为字符串并连接它们而不是添加它们。JavaScript 不是我的专长。

代码是：

var ViewModel = function() {
    self = this;
    this.RegSun = ko.observable(0);
    this.RegMon = ko.observable(0);
    this.RegTue = ko.observable(0);
    this.RegWed = ko.observable(0);
    this.RegThu = ko.observable(0);
    this.RegFri = ko.observable(0);
    this.RegSat = ko.observable(0);
    this.HolSun = ko.observable(0);
    this.HolMon = ko.observable(0);
    this.HolTue = ko.observable(0);
    this.HolWed = ko.observable(0);
    this.HolThu = ko.observable(0);
    this.HolFri = ko.observable(0);
    this.HolSat = ko.observable(0);

    this.RegSun.extend({ required: true, min: 0, max: 24 });
    this.RegMon.extend({ required: true, min: 0, max: 24 });
    this.RegTue.extend({ required: true, min: 0, max: 24 });
    this.RegWed.extend({ required: true, min: 0, max: 24 });
    this.RegThu.extend({ required: true, min: 0, max: 24 });
    this.RegFri.extend({ required: true, min: 0, max: 24 });
    this.RegSat.extend({ required: true, min: 0, max: 24 });
    this.HolSun.extend({ required: true, min: 0, max: 24 });
    this.HolMon.extend({ required: true, min: 0, max: 24 });
    this.HolTue.extend({ required: true, min: 0, max: 24 });
    this.HolWed.extend({ required: true, min: 0, max: 24 });
    this.HolThu.extend({ required: true, min: 0, max: 24 });
    this.HolFri.extend({ required: true, min: 0, max: 24 });
    this.HolSat.extend({ required: true, min: 0, max: 24 });

    this.RegTot = ko.computed(function() {
        return self.RegSun() + self.RegMon() + self.RegTue() + self.RegWed() + self.RegThu() + self.RegFri() + self.RegSat();
    });
    this.HolTot = ko.computed(function() {
        return self.HolSun() + self.HolMon() + self.HolTue() + self.HolWed() + self.HolThu() + self.HolFri() + self.HolSat();
    });
    this.TotSun = ko.computed(function() {
        return self.RegSun() + self.HolSun();
    });
    this.TotMon = ko.computed(function() {
        return self.RegMon() + self.HolMon();
    });
    this.TotTue = ko.computed(function() {
        return self.RegTue() + self.HolTue();
    });
    this.TotWed = ko.computed(function() {
        return self.RegWed() + self.HolWed();
    });
    this.TotThu = ko.computed(function() {
        return self.RegThu() + self.HolThu();
    });
    this.TotFri = ko.computed(function() {
        return self.RegFri() + self.HolFri();
    });
    this.TotSat = ko.computed(function() {
        return self.RegSat() + self.HolSat();
    });
    this.TotTot = ko.computed(function() {
        return self.RegTot() + self.HolTot();
    });
};

和 HTML 是：

<table class="workspacetable">
    <thead><tr><th>&nbsp;</th><th>Sun</th><th>Mon</th><th>Tue</th><th>Wed</th><th>Thu</th><th>Fri</th><th>Sat</th><th>Total</th></tr></thead>
    <tr><td>Regular</td><td><input type="text" data-bind="value: RegSun" class="timesheethours" /></td><td><input type="text" data-bind="value: RegMon" class="timesheethours" /></td><td><input type="text" data-bind="value: RegTue" class="timesheethours" /></td><td><input type="text" data-bind="value: RegWed" class="timesheethours" /></td><td><input type="text" data-bind="value: RegThu" class="timesheethours" /></td><td><input type="text" data-bind="value: RegFri" class="timesheethours" /></td><td><input type="text" data-bind="value: RegSat" class="timesheethours" /></td><td><span data-bind="text: Number(RegTot())">&nbsp;</span></td></tr>
    <tr><td>Holiday</td><td><input type="text" data-bind="value: HolSun" class="timesheethours" /></td><td><input type="text" data-bind="value: HolMon" class="timesheethours" /></td><td><input type="text" data-bind="value: HolTue" class="timesheethours" /></td><td><input type="text" data-bind="value: HolWed" class="timesheethours" /></td><td><input type="text" data-bind="value: HolThu" class="timesheethours" /></td><td><input type="text" data-bind="value: HolFri" class="timesheethours" /></td><td><input type="text" data-bind="value: HolSat" class="timesheethours" /></td><td><span data-bind="text: HolTot">&nbsp;</span></td></tr>
    <tr><td><b>Total</b></td><td><span data-bind="text: TotSun">&nbsp;</span></td><td><span data-bind="text: TotMon">&nbsp;</span></td><td><span data-bind="text: TotTue">&nbsp;</span></td><td><span data-bind="text: TotWed">&nbsp;</span></td><td><span data-bind="text: TotThu">&nbsp;</span></td><td><span data-bind="text: TotFri">&nbsp;</span></td><td><span data-bind="text: TotSat">&nbsp;</span></td><td><span data-bind="text: TotTot">&nbsp;</span></td></tr>
</table>

我这里有一个小提琴

如果您为小提琴中的一个日期输入一个值，问题应该立即显而易见。当然，我错过了一些简单的东西。

Answer 1

它们是字符串，因为它们绑定到接受字符串的文本框。您需要将它们转换回数字。就像是：

this.TotSun = ko.computed(function() {
    return parseInt(self.RegSun(),10) + parseInt(self.HolSun(),10);
});

请参阅parseInt。注意：看parseFloat是否需要支持浮点值。

但正如@BenjaminGruenbaum 在评论中所说，你真的需要学习使用数组。