按揭計算器/我可以借多少錢

我必須修理這個抵押計算器，但我真的不明白為什么計算不起作用。我需要幫助來解決這個問題。或者至少有人讓我了解這個功能有什么問題。（計算器輸入了申請人的合并年收入和存款的另一個輸入。計算器應顯示最大財產價值和估計每月成本的結果）。

function PMT (rate_per_period, number_of_payments, present_value, future_value, type ) {
        var q = Math.pow(1   rate_per_period, number_of_payments);
        return (rate_per_period * (future_value   (q * present_value))) / ((-1   q) * (1   rate_per_period * (type)));
}

jQuery(document).ready(function ($) {

        $(".input").keyup(function () {
            var annualIncomeInput = 0;
            var depositInput = 0;
            var annualIncome = 0;
            var deposit = 0;
            var mortgage = 0;
            var propertyValue = 0;
            var monthlyPayments = 0;
            annualIncomeInput = $('#annualIncome').val();
            depositInput = $('#deposit').val();
            annualIncome = parseFloat(annualIncomeInput.replace(/,/g, ''));
            deposit = parseFloat(depositInput.replace(/,/g, ''));
            if (annualIncomeInput && depositInput) {
                if ((deposit / 0.1 - deposit) >= (annualIncome * 4.5)) {
                    mortgage = annualIncome * 4.5;
                    propertyValue = mortgage   deposit;
                } else {
                    propertyValue = deposit / 0.1;
                    mortgage = propertyValue - deposit;
                }
                monthlyPayments = PMT(0.0307/12, 30*12, mortgage, 0, 0).toFixed(2);
            }
            
            propertyValue = parseFloat(propertyValue).toLocaleString();
            monthlyPayments = parseFloat(monthlyPayments).toLocaleString();
            $('#totalHowMuchCanIBorrow').text('￡'   propertyValue);
            $('#estimatedCosts').text('￡'   monthlyPayments);
            
        })
    })

如果您需要更多詳細資訊，請告訴我！謝謝！

uj5u.com熱心網友回復：

這可行，也許您可??以通過將其與您的錯誤進行比較來發現錯誤:) 沒有更改任何內容，只是向其中添加了合適的 html

function PMT(rate_per_period, number_of_payments, present_value, future_value, type) {
  var q = Math.pow(1   rate_per_period, number_of_payments);
  return (rate_per_period * (future_value   (q * present_value))) / ((-1   q) * (1   rate_per_period * (type)));
}

jQuery(document).ready(function($) {
  //not sure how your html looks but maybe here you want $("input") and not $(".input") that selects all elements with the css class input that's maybe missing in the html
  $(".input").keyup(function() {
    var annualIncomeInput = 0;
    var depositInput = 0;
    var annualIncome = 0;
    var deposit = 0;
    var mortgage = 0;
    var propertyValue = 0;
    var monthlyPayments = 0;
    annualIncomeInput = $('#annualIncome').val();
    depositInput = $('#deposit').val();
    annualIncome = parseFloat(annualIncomeInput.replace(/,/g, ''));
    deposit = parseFloat(depositInput.replace(/,/g, ''));
    if (annualIncomeInput && depositInput) {
      if ((deposit / 0.1 - deposit) >= (annualIncome * 4.5)) {
        mortgage = annualIncome * 4.5;
        propertyValue = mortgage   deposit;
      } else {
        propertyValue = deposit / 0.1;
        mortgage = propertyValue - deposit;
      }
      monthlyPayments = PMT(0.0307 / 12, 30 * 12, mortgage, 0, 0).toFixed(2);
    }

    propertyValue = parseFloat(propertyValue).toLocaleString();
    monthlyPayments = parseFloat(monthlyPayments).toLocaleString();
    $('#totalHowMuchCanIBorrow').text('￡'   propertyValue);
    $('#estimatedCosts').text('￡'   monthlyPayments);

  })
})

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>

<input class="input" id='annualIncome' type="number">
<input class="input" id='deposit' type="number">
<div id="totalHowMuchCanIBorrow"></div>
<div id="estimatedCosts"></div>

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