计算使用一个千分离器格式的键UP函数

Question

我想在用户键输入时进行计算，结果将显示在其他字段中。格式编号为千分离器，例如2,500.00

因此，如果我总和 2,500.00 2,500.00 结果必须为5,000.00

但是我的代码显示 4.00

function isNumberKey(evt) {
  var theEvent = evt || window.event;
  var key = theEvent.keyCode || theEvent.which;
  key = String.fromCharCode(key);
  if (key.length == 0) return;
  var regex = /^[0-9.,b]+$/;
  if (!regex.test(key)) {
    theEvent.returnValue = false;
    if (theEvent.preventDefault) theEvent.preventDefault();
  }
}
function toFloat(z) {
  var x = document.getElementById(z);
  x.value = parseFloat(x.value).toFixed(2).replace(/d(?=(d{3})+.)/g, '$&,');
}
$( ".fn" ).keyup(function() {
 var nmi = $('#nmi').val();
  var a = $('#a').val();
  var total = parseFloat(nmi) + parseFloat(a);
  $("#total").val(parseFloat(total).toFixed(2).replace(/d(?=(d{3})+.)/g, '$&,'));
});

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<input onchange="toFloat('nmi')" type="text" maxlength="10" onkeypress="return isNumberKey(event)" required="required" class="form-control fn" placeholder="RM" name="nmi" id="nmi">
<input onchange="toFloat('a')" type="text" maxlength="10" onkeypress="return isNumberKey(event)" required="required" class="form-control fn" placeholder="RM" name="a" id="a">
<br> total
<input onchange="toFloat('total')" type="text" maxlength="10" onkeypress="return isNumberKey(event)" required="required" class="form-control fn" placeholder="RM" name="total" id="total">

Answer 1

让我们尝试这个,,,,，对我有用的" dial gtg"

$('input.CurrencyInput').on('blur', function() {
  const value = this.value.replace(/,/g, '');
  this.value = parseFloat(value).toLocaleString('en-US', {
    style: 'decimal',
    maximumFractionDigits: 2,
    minimumFractionDigits: 2
  });
});
$('input.CurrencyInput2').on('blur', function() {
  const value = this.value.replace(/,/g, '');
  this.value = parseFloat(value).toLocaleString('en-US', {
    style: 'decimal',
    maximumFractionDigits: 2,
    minimumFractionDigits: 2
  });
});
$( ".fn" ).keyup(function() {
 var a = $('#a').val().replace(/,/g,'');
 
  var b = $('#b').val().replace(/,/g,'');
  var total = parseFloat(a) + parseFloat(b);
  $("#total_nya").val(parseFloat(total).toFixed(2).replace(/d(?=(d{3})+.)/g, '$&,'));
});

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<input class="CurrencyInput fn" id="a">
<input class="CurrencyInput2 fn" id="b">
<input class="total_nya" id="total_nya">

Answer 2

何时parseFloat('2,500.00')由于,而返回2。

parsefloat ：解析其参数，并返回浮点数。如果它遇到符号以外的字符（ 或 - ），数字（0-9），小数点或指数，则它将返回值直至该点并忽略该字符，并且所有后续的字符

使用replace()

将,从价值中删除

function isNumberKey(evt) {
  var theEvent = evt || window.event;
  var key = theEvent.keyCode || theEvent.which;
  key = String.fromCharCode(key);
  if (key.length == 0) return;
  var regex = /^[0-9.,b]+$/;
  if (!regex.test(key)) {
    theEvent.returnValue = false;
    if (theEvent.preventDefault) theEvent.preventDefault();
  }
}
function toFloat(z) {
  var x = document.getElementById(z);
  x.value = parseFloat(x.value).toFixed(2).replace(/d(?=(d{3})+.)/g, '$&,');
}
$( ".fn" ).keyup(function() {
 var nmi = $('#nmi').val().replace(/,/g,'');
 
  var a = $('#a').val().replace(/,/g,'');
  var total = parseFloat(nmi) + parseFloat(a);
  $("#total").val(parseFloat(total).toFixed(2).replace(/d(?=(d{3})+.)/g, '$&,'));
});

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<input onchange="toFloat('nmi')" type="text" maxlength="10" onkeypress="return isNumberKey(event)" required="required" class="form-control fn" placeholder="RM" name="nmi" id="nmi">
<input onchange="toFloat('a')" type="text" maxlength="10" onkeypress="return isNumberKey(event)" required="required" class="form-control fn" placeholder="RM" name="a" id="a">
<br> total
<input onchange="toFloat('total')" type="text" maxlength="10" onkeypress="return isNumberKey(event)" required="required" class="form-control fn" placeholder="RM" name="total" id="total">

Answer 3

对于您的代码更改简单。

$(document).ready(function() {
  $('.fn').on('input', function() {
    this.value = this.value.match(/^d+.?d{0,2}/);
    calculate();
  });
});
function calculate() {
  var t = 0;
  nmi = ($("#nmi").val() ? parseFloat($("#nmi").val()) : 0);
  a = ($("#a").val() ? parseFloat($("#a").val()) : 0);
  $("#total").val(nmi + a);
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<input type="text" maxlength="10" required="required" class="form-control fn" placeholder="RM" name="nmi" id="nmi">
<input type="text" maxlength="10" required="required" class="form-control fn" placeholder="RM" name="a" id="a">
<br> total
<input type="text" maxlength="10" required="required" class="form-control fn" placeholder="RM" name="total" id="total">