Question

我使用重写的hsCountdown库，对于某些数字，它显示错误的值：
在上面的示例中，我指定“130”表示增量，但hsCountdown仅将其递增至125. 为什么？

我正在调试“r”变量（位于#debug_console的位置）以及你的意思是什么？这个变量神奇地增加不是整数，而是浮点数例如，54.0000000001而不是54. JavaScript，你喝醉了！

(function(a) {
    "use strict";
    a.fn.hsCounter = function(b) {
        var c = a.extend({
            delay: 50,
            signPos: "after",
            classVisible: "countup-vis",
            decimalSeparator: ".",
            orderSeparator: " "
        }, b);
        return this.each(function() {
            b && a.extend(c, b);
            var timer, num, line, content, self = a(this),
                win = a(window),
                winTop = win.scrollTop(),
                winHeight = win.height(),
                numb = self.data("num"),
                increment = self.data("increment") ? self.data("increment") : (numb / 25 > 1.0 ? numb / 25 : 1.0),
                fractional = self.data("fractional") ? self.data("fractional") : 0,
                sign = self.data("sign") ? self.data("sign") : "",
                regExp = /(\d)(?=(\d\d\d)+([^\d]|$))/g,
                start = self.data("start") ? +self.data("start") : 0,
                amount = a(".countup-amount"),
                realMaxNumber = numb - increment;

				winTop <= self.offset().top && winTop + winHeight >= self.offset().top && (timer = setTimeout(function u() {
					var currentIncrement = (fractional > 0 ? start.toFixed(fractional) : start);
					$('#debug_console').append('[Condition debug] (currentIncrement <= realMaxNumber) equals ('+currentIncrement+' <= '+realMaxNumber+')<br>');

					return (currentIncrement <= realMaxNumber)
					
					?
					
					(start += increment, num = start.toFixed(fractional).replace(".", c.decimalSeparator).replace(regExp, "$1" + c.orderSeparator), content = self.find(amount).html(num), "after" == c.signPos ? self.html('<span class="countup-amount">' + num + '</span><span class="countup-sign">' + sign + "</span>") : "before" == c.signPos && self.html('<span class="countup-sign">' + sign + '</span><span class="countup-amount">' + num + "</span>"), self.hasClass("progress-up") && (self.html(self.html() + "<ins/>"), self.find("ins").css("width", start + "%")), self.parent().hasClass("countup-wrap") && (line = self.parent().find(".countup-line"), line.css("width", start + "%")), void(timer = setTimeout(u, c.delay)))
					
					:
					
					(start = numb, !0);
				}, c.delay));
        });
    }
})(jQuery);

function initCounter(a, b) { b ? a.hsCounter() : a.text("0"); }

initCounter($(".counterup"), 1);

<script src="https://code.jquery.com/jquery-1.12.4.min.js"></script>

<h1 class="counterup js" data-num="130">...</h1>

<div id="debug_console"></div>

Answer 1

问题依赖于这些方面：

n = h.data("increment") ? h.data("increment") : (l / 25 > 1.0 ? l / 25 : 1.0),和t = l - n;

t基本上是此代码所依据的数字。 t计算为l（data-num属性，在这种情况下为130减去n，它是从data-increment属性派生的。

如您所见，您未提供data-increment，代码默认为l / 25，即130/25 = 5.2。然后，t实际上是l - n = 130 - 5.2 = 124.8，这就是为什么它计为125而不是30。

一个简单的解决方案是将data-increment="1"添加到您的h1代码中。您也可以考虑更改n变量的默认计算。

修改

我看到你编辑了代码，这很好，因为它更容易调试。我认为解决方案应该是改变这一行：(start = numb, !0);如下：self.find(".countup-amount").html(numb);它基本上意味着如果当前数字+增量值大于目标值，则意味着它是最后一个步骤，我们可以简单地使用目标值填充span。

Answer 2

修正了JS代码

(function(a) {
    "use strict";
    a.fn.hsCounter = function(b) {
        var c = a.extend({
            delay: 50,
            signPos: "after",
            classVisible: "countup-vis",
            decimalSeparator: ".",
            orderSeparator: " "
        }, b);
        return this.each(function() {
            b && a.extend(c, b);
            var timer, num, line, content, self = a(this),
                win = a(window),
                winTop = win.scrollTop(),
                winHeight = win.height(),
                numb = self.data("num"),
                fractional = self.data("fractional") ? self.data("fractional") : 0,
                decim = fractional > 0 ? 0.5 : 1.0,
                increment = self.data("increment") ? self.data("increment") : (numb / 25 > decim ? numb / 25 : decim),
                sign = self.data("sign") ? self.data("sign") : "",
                regExp = /(\d)(?=(\d\d\d)+([^\d]|$))/g,
                start = self.data("start") ? +self.data("start") : 0,
                amount = a(".countup-amount");

                winTop <= self.offset().top && winTop + winHeight >= self.offset().top && (timer = setTimeout(function u() {
                    if ((fractional > 0 ? start.toFixed(fractional) : start) < numb) {
                        var stin = (start + increment > numb) ? (start = numb) : (start += increment);
                        return (stin, num = start.toFixed(fractional).replace(".", c.decimalSeparator).replace(regExp, "$1" + c.orderSeparator), content = self.find(amount).html(num), "after" == c.signPos ? self.html('<span class="countup-amount">' + num + '</span><span class="countup-sign">' + sign + "</span>") : "before" == c.signPos && self.html('<span class="countup-sign">' + sign + '</span><span class="countup-amount">' + num + "</span>"), self.hasClass("progress-up") && (self.html(self.html() + "<ins/>"), self.find("ins").css("width", start + "%")), self.parent().hasClass("countup-wrap") && (line = self.parent().find(".countup-line"), line.css("width", start + "%")), void(timer = setTimeout(u, c.delay)));
                    } else {
                        return (start = numb, !0);
                    }
                }, c.delay));
        });
    }
})(jQuery);

function initCounter(a, b) { b ? a.hsCounter() : a.text("0"); }

initCounter($(".counterup"), 1);

jQuery hsCountdown为某些数字返回错误的值

2 个答案: