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我有一個抵押計算器，我已經建立了。除了一個小錯誤，一切似乎都很好。有兩個輸入字段帶有一個按鈕，它們都帶有整數，並通過一系列計算來運行它們以查找抵押的許多屬性（即每月支付，剩餘貸款餘額等）。只有當我輸入兩個連續的整數時，輸入字段沒有運行功能
現在我遇到的問題只在預付費領域。如果我連續輸入兩個整數，則不會處理新的每月付款。如果我做兩個百分比或整數 - {計算} - 百分比 - {計算} - 整數 - {計算}它會正確計算。
這裏是我覺得代碼有問題：
// User Data Object
var userData = {};
// Gather User Data from form than display results above form
function calculateUserMontlyPayments() {
userData.salePrice = 0;
userData.downPayment = 0;
userData.salePrice = document.getElementById("userHomePrice").value;
userData.downPayment = document.getElementById("userDownPayment").value;
//MortgageCalculator.calculateMortgage().calculateLoanAmount(userData.downPayment);
var results = MortgageCalculator.calculateMortgage(userData);
document.getElementById("userPayments").innerHTML = '$' + results.fullMonthlyPayment;
document.getElementById("allInfo").innerHTML = results.downPayment;
};
var MortgageCalculator = {
calculateMortgage: function(options) {
Date.isLeapYear = function(year) {
return (((year % 4 === 0) && (year % 100 !== 0)) || (year % 400 === 0));
console.log('Leap Year');
};
Date.getDaysInMonth = function(year, month) {
return [31, (Date.isLeapYear(year) ? 29 : 28), 31, 30, 31, 30, 31, 31, 30, 31, 30, 31][month];
};
Date.prototype.isLeapYear = function() {
var y = this.getFullYear();
return (((y % 4 === 0) && (y % 100 !== 0)) || (y % 400 === 0));
};
Date.prototype.getDaysInMonth = function() {
return Date.getDaysInMonth(this.getFullYear(), this.getMonth());
};
Date.prototype.addMonths = function(value) {
var n = this.getDate();
this.setDate(1);
this.setMonth(this.getMonth() + value);
this.setDate(Math.min(n, this.getDaysInMonth()));
return this;
};
function initOptions(options) {
var mortgage = {};
mortgage.loanTermMonths = options.loanTermMonths || 12 * 30;
mortgage.salePrice = options.salePrice || 500000;
mortgage.interestRate = options.interestRate || 5.00;
mortgage.downPayment = options.downPayment || '20%';
mortgage.salePrice = options.salePrice || 500000;
mortgage.extras = options.extras || [];
mortgage.propertyTaxRate = options.propertyTaxRate || .78;
mortgage.homeInsurance = options.homeInsurance || 0.22;
mortgage.adjustFixedRateMonths = options.adjustFixedRateMonths || 0;
mortgage.adjustInitialCap = options.adjustInitialCap || 0;
mortgage.adjustPeriodicCap = options.adjustPeriodicCap || 0;
mortgage.adjustLifetimeCap = options.adjustLifetimeCap || 0;
mortgage.adjustIntervalMonths = options.adjustIntervalMonths || 12;
mortgage.startDate = options.startDate || new Date();
return mortgage;
}
function calculateLoanAmount(mortgage) {
var loanAmount;
if (typeof mortgage.downPayment == 'string') {
var downPercent = mortgage.downPayment.substr(0, mortgage.downPayment.indexOf('%'));
loanAmount = mortgage.salePrice - (mortgage.salePrice * (downPercent/100));
} else {
loanAmount = mortgage.salePrice - mortgage.downPayment;
}
return loanAmount;
}
function roundDecimals(num) {
var decimals = 2;
return Math.round(num * Math.pow(10, decimals))/Math.pow(10, decimals);
}
function roundAmortizationValues(amortization) {
amortization.monthlyPayment = roundDecimals(amortization.monthlyPayment);
amortization.interest = roundDecimals(amortization.interest);
amortization.interestToDate = roundDecimals(amortization.interestToDate);
amortization.interestLoanYearToDate = roundDecimals(amortization.interestLoanYearToDate);
amortization.principal = roundDecimals(amortization.principal);
amortization.principalLoanYearToDate = roundDecimals(amortization.principalLoanYearToDate);
amortization.principalToDate = roundDecimals(amortization.principalToDate);
amortization.extra = roundDecimals(amortization.extra);
amortization.principalTotal = roundDecimals(amortization.principalTotal);
amortization.paymentTotal = roundDecimals(amortization.paymentTotal);
return amortization;
}
function calculateExtraPayment(mortgage, loanMonth) {
var totalExtra = 0;
if (mortgage.extras) {
for (var i in mortgage.extras) {
var extra = mortgage.extras[i];
if (loanMonth >= extra.startMonth && loanMonth <= extra.endMonth) {
if ((loanMonth - extra.startMonth) % extra.extraIntervalMonths == 0) {
totalExtra += extra.extraAmount * 100;
}
}
}
}
return totalExtra;
}
function aprToMonthlyInterest(apr) {
return apr/(12 * 100);
}
function calculatePropertyTax(mortgage) {
var monthlyPropertyTax;
if (mortgage.propertyTaxRate && mortgage.propertyTaxRate > 0) {
monthlyPropertyTax = (mortgage.salePrice * 100 * (mortgage.propertyTaxRate/100))/12;
} else {
monthlyPropertyTax = 0;
}
return monthlyPropertyTax;
}
function calculateHomeInsurance(mortgage) {
var monthlyHomeInsurance;
if (mortgage.homeInsurance && mortgage.homeInsurance > 0) {
monthlyHomeInsurance = (mortgage.salePrice * 100 * (mortgage.homeInsurance/100))/12;
} else {
monthlyHomeInsurance = 0;
}
return monthlyHomeInsurance;
}
/**
* Mortgage needs reset if this mortgage is ARM and current loam month falls into
* new interest period.
*
* @param mortgage
* @param loanMonth
*/
function needsInterestReset(mortgage, loanMonth) {
if (mortgage.adjustFixedRateMonths <= 0 || loanMonth <= mortgage.adjustFixedRateMonths) {
return false;
}
return (loanMonth - mortgage.adjustFixedRateMonths - 1) % mortgage.adjustIntervalMonths == 0;
}
function calculateInterestRate(mortgage, loanMonth) {
if (mortgage.adjustFixedRateMonths <= 0 || loanMonth <= mortgage.adjustFixedRateMonths) {
return mortgage.interestRate;
}
var armInterestRate = mortgage.interestRate + mortgage.adjustInitialCap;
if (loanMonth > mortgage.adjustFixedRateMonths + 1) {
for (var i = mortgage.adjustFixedRateMonths + mortgage.adjustIntervalMonths; i <= loanMonth; i += mortgage.adjustIntervalMonths) {
armInterestRate += mortgage.adjustPeriodicCap;
}
}
armInterestRate = Math.min(armInterestRate, mortgage.adjustLifetimeCap + mortgage.interestRate)
return armInterestRate;
}
function calculateMonthlyPayment(loanAmount, loanTermMonths, interestRate) {
var monthlyInterestRate = aprToMonthlyInterest(interestRate);
var monthlyPayment = loanAmount * (monthlyInterestRate * Math.pow(1 + monthlyInterestRate, loanTermMonths))/
(Math.pow(1 + monthlyInterestRate, loanTermMonths) - 1);
return monthlyPayment;
}
function calculateAmortizations(mortgage) {
//To avoid rounding errors, all dollars will be converted to cents and converted back to dollars
//to response objects.
var remainingLoanAmountInCents = mortgage.loanAmount * 100;
var loanAmountInCents = mortgage.loanAmount * 100;
var monthlyPropertyTaxInCents = calculatePropertyTax(mortgage);
var monthlyHomeInsuranceInCents = calculateHomeInsurance(mortgage);
var amortizations = [];
var previousAmortization;
var loanMonth = 0;
var loanYear = 1;
var loanYearRollUpSummary = {};
var currentInterestRate = calculateInterestRate(mortgage, 1);
var currentMonthlyPaymentInCents = calculateMonthlyPayment(remainingLoanAmountInCents, mortgage.loanTermMonths, currentInterestRate);
var rollupSummaryFields = ['interest', 'principal', 'extra', 'principalTotal', 'propertyTax', 'paymentTotal'];
while (remainingLoanAmountInCents >= 1) {
loanMonth++
var amortization = {};
if (needsInterestReset(mortgage, loanMonth)) {
currentInterestRate = calculateInterestRate(mortgage, loanMonth);
currentMonthlyPaymentInCents = calculateMonthlyPayment(remainingLoanAmountInCents, mortgage.loanTermMonths + 1 - loanMonth, currentInterestRate);
}
amortization.interestRate = currentInterestRate;
amortization.scheduledMonthlyPayment = currentMonthlyPaymentInCents;
amortization.interest = remainingLoanAmountInCents * aprToMonthlyInterest(amortization.interestRate);
amortization.principal = currentMonthlyPaymentInCents - amortization.interest;
if (remainingLoanAmountInCents < amortization.principal) {
amortization.principal = remainingLoanAmountInCents;
amortization.extra = 0;
} else {
amortization.extra = calculateExtraPayment(mortgage, loanMonth);
}
amortization.principalTotal = amortization.principal + amortization.extra;
amortization.propertyTax = monthlyPropertyTaxInCents;
amortization.homeInsurance = monthlyHomeInsuranceInCents;
amortization.paymentTotal = amortization.interest + amortization.principalTotal + monthlyPropertyTaxInCents + monthlyHomeInsuranceInCents;
//amortization.paymentDate = new Date(mortgage.startDate.getTime()).addMonths(loanMonth);
remainingLoanAmountInCents -= amortization.principalTotal;
//If remaining loan amount is less than zero, then set it to zero.
if (remainingLoanAmountInCents < 0) {
remainingLoanAmountInCents = 0;
}
amortization.remainingLoanBalnce = remainingLoanAmountInCents;
amortization.loanMonth = loanMonth;
amortization.loanYear = loanYear;
rollupSummaryFields.map(function(field) {
if (loanYearRollUpSummary[field]) {
loanYearRollUpSummary[field] += amortization[field];
} else {
loanYearRollUpSummary[field] = amortization[field];
}
amortization[field + 'LoanYearToDate'] = loanYearRollUpSummary[field];
});
if (loanMonth % 12 === 0) {
loanYearRollUpSummary = {};
loanYear++;
}
rollupSummaryFields.map(function(field) {
if (previousAmortization) {
amortization[field + 'ToDate'] = previousAmortization[field + 'ToDate'] + amortization[field];
} else {
amortization[field + 'ToDate'] = amortization[field];
}
});
previousAmortization = amortization;
amortizations.push(amortization);
}
//Round all amortization values to dollars.
mortgage.totalLoanCost = 0;
var additionalFieldsToProcess = ['scheduledMonthlyPayment', 'remainingLoanBalnce'];
for (var i = 0; i < amortizations.length; i++) {
var amortization = amortizations[i];
rollupSummaryFields.map(function(field) {
amortization[field] = roundDecimals(amortization[field]/100);
amortization[field + 'ToDate'] = roundDecimals(amortization[field + 'ToDate']/100);
amortization[field + 'LoanYearToDate'] = roundDecimals(amortization[field + 'LoanYearToDate']/100);
});
additionalFieldsToProcess.map(function(field) {
amortization[field] = roundDecimals(amortization[field]/100);
});
mortgage.totalLoanCost += amortization.interest;
}
mortgage.totalLoanCost = roundDecimals(mortgage.totalLoanCost);
mortgage.paymentSchedule = amortizations;
mortgage.numberOfPayments = mortgage.paymentSchedule.length;
mortgage.monthlyPayment = mortgage.paymentSchedule[0].scheduledMonthlyPayment;
mortgage.fullMonthlyPayment = amortization.paymentTotal;
}
var mortgage = initOptions(options);
mortgage.loanAmount = calculateLoanAmount(mortgage);
calculateAmortizations(mortgage);
return mortgage;
}
}<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Mortgage Calculator</title>
<script src="https://code.jquery.com/jquery-3.2.1.min.js" integrity="sha256-hwg4gsxgFZhOsEEamdOYGBf13FyQuiTwlAQgxVSNgt4=" crossorigin="anonymous"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js" integrity="sha384-Tc5IQib027qvyjSMfHjOMaLkfuWVxZxUPnCJA7l2mCWNIpG9mGCD8wGNIcPD7Txa" crossorigin="anonymous"></script>
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous">
<style media="screen">
input:focus {
outline: none;
}
</style>
</head>
<body>
<div class="row">
<div class="col-sm-12 push-20 text-center">
<h5 class="push-10">Monthly Payments</h5>
<h2 id="userPayments">$0</h2>
</div>
<div class="col-sm-offset-2 col-sm-4 text-center">
<input id="userHomePrice" type="text" name="Home Price" value="538000" placeholder="Home Price">
</div>
<div class="col-sm-4 text-center">
<input id="userDownPayment" type="text" name="Interest Price" value="20%" placeholder="Down Payment">
</div>
<div class="col-sm-12 push-20 text-center">
<button onclick="calculateUserMontlyPayments()">Submit</button>
</div>
<div class="col-sm-12 text-center">
<h5>results.downPayment</h5>
</div>
<div class="col-sm-12 text-center">
<p id="allInfo"></p>
</div>
</div>
<script type="text/javascript" src="mortgage-calculator.js"></script>
</body>
</html>我依然很綠，當涉及到JavaScript和我現在只是最後的地方，我可以實現點原始的源代碼並將其插入到項目中，所以如果我的措辭不正確，或者這是一個常見的錯誤，我表示歉意。我似乎無法提出足夠好的問題來找到已經在網上寫過的答案。
您的片段不工作，把它放在你的代碼的結尾 –