Question

我想在用户键入内容时进行计算，结果将显示在其他字段中。格式编号，带千位分隔符，例如2,500.00

因此，如果我总计 2,500.00 + 2,500.00 ，则结果必须为5,000.00

但我的代码显示为 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

parseFloat('2,500.00')因2而返回,时。

parseFloat ：解析其参数，并返回浮点数。如果遇到除符号（+或-），数字（0-9），小数点或指数以外的字符，它将返回到该点的值，并忽略该字符和所有后续字符< / strong>

使用,从值中删除replace()

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 2

简单的代码更改。

$(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">

Answer 3

让我们尝试一下，那对我有用“ 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">

具有一千个分隔符格式的计算使用关键功能

3 个答案: