javascript - 如何显示 javascript 债务计数器(从 2016 年 1 月 1 日起以 0.80 美元/秒计算)？

Question

我的客户想要一个债务计数器，显示自 2016 年 1 月 1 日以来累积的债务金额，以每秒 0.80 美分的速度增加。显然，我无法在页面加载时刷新该内容，并且我到处寻找可以做到这一点的东西。长话短说，我找不到我要找的东西，所以我想我可以用下面的代码发挥创意，反向使用倒计时计数器，并可能将数字设置为等于正确的债务金额。

另外，我不是数学专家，所以答案可能就在我的脸上。

这是我现在使用的代码(来自 Robert Hashemian - hashemian.com):

在我的index.html中显示计数器:

<script language="JavaScript">
TargetDate = "01/01/2016 12:00 AM";
BackColor = "";
ForeColor = "white";
CountActive = true;
CountStepper = 1;
LeadingZero = true;
DisplayFormat = "$%%D%%,%%H%%,%%M%%,%%S%%";
FinishMessage = "It is finally here!";
</script>

Javascript 文件:

function calcage(secs, num1, num2) {
  s = ((Math.floor(secs/num1))%num2).toString();
  if (LeadingZero && s.length < 2)
    s = "0" + s;
  return "<b>" + s + "</b>";
}

function CountBack(secs) {
  if (secs < 0) {
    document.getElementById("cntdwn").innerHTML = FinishMessage;
    return;
  }
  DisplayStr = DisplayFormat.replace(/%%D%%/g, calcage(secs,86400,100000));
  DisplayStr = DisplayStr.replace(/%%H%%/g, calcage(secs,3600,24));
  DisplayStr = DisplayStr.replace(/%%M%%/g, calcage(secs,60,60));
  DisplayStr = DisplayStr.replace(/%%S%%/g, calcage(secs,1,60));

  document.getElementById("cntdwn").innerHTML = DisplayStr;
  if (CountActive)
    setTimeout("CountBack(" + (secs+CountStepper) + ")", SetTimeOutPeriod);
}

function putspan(backcolor, forecolor) {
 document.write("<span id='cntdwn' style='background-color:" + backcolor + 
                "; color:" + forecolor + "'></span>");
}

if (typeof(BackColor)=="undefined")
  BackColor = "white";
if (typeof(ForeColor)=="undefined")
  ForeColor= "black";
if (typeof(TargetDate)=="undefined")
  TargetDate = "12/31/2020 5:00 AM";
if (typeof(DisplayFormat)=="undefined")
  DisplayFormat = "%%D%% Days, %%H%% Hours, %%M%% Minutes, %%S%% Seconds.";
if (typeof(CountActive)=="undefined")
  CountActive = true;
if (typeof(FinishMessage)=="undefined")
  FinishMessage = "";
if (typeof(CountStepper)!="number")
  CountStepper = -1;
if (typeof(LeadingZero)=="undefined")
  LeadingZero = true;


CountStepper = Math.ceil(CountStepper);
if (CountStepper == 0)
  CountActive = false;
var SetTimeOutPeriod = (Math.abs(CountStepper)-1)*1000 + 990;
putspan(BackColor, ForeColor);
var dthen = new Date(TargetDate);
var dnow = new Date();
if(CountStepper>0)
  ddiff = new Date(dnow-dthen);
else
  ddiff = new Date(dthen-dnow);
gsecs = Math.floor(ddiff.valueOf()/1000);
CountBack(gsecs);

如果有人有更好的代码或想法，我不会接受上面的任何代码或想法。感谢任何愿意提供帮助的人!

Answer 1

这应该可以帮助您入门。首先获取当前余额，然后使用 setInterval 每秒更新一次。您可以在 setInterval 函数中完成所有渲染。

var date1 = new Date("01/01/2016 00:00:00");
var date2 = new Date();

var diff = (date2.getTime() - date1.getTime())/1000;
var debt = diff*.80

setInterval ( function() {
  
   debt += .80;
   console.log(debt.toFixed(2));
   
  
  }, 1000);

或者类似的东西

const date1 = new Date("01/01/2016 00:00:00");
setInterval ( function() {
   var date2 = new Date();
   var diff = (date2.getTime() - date1.getTime())/1000;
   var debt = diff*.80
   console.log(debt.toFixed(2));

  }, 1000);