Basic Mortgage Calculator

Mortgage Calculator - Basic Sample

This sample uses JavaScript to read the data from the form, write the values into a JavaScript object and then calls the rule engine with the object. The results are then written back to the form.

<script src="MortgageCalculator.min.js"></script>
 <script language="javascript">
 function runRules() {
 var mortgage = {};
 mortgage.LoanInfo = {};
 mortgage.LoanInfo.Principal = document.getElementById('loanAmount').value;
 mortgage.LoanInfo.APR = document.getElementById('apr').value;
 mortgage.LoanInfo.TermInYears =
document.getElementById('termInYears').value;
 var session = inrule.createRuleSession();
 var entity = session.createEntity('Mortgage', mortgage);
 session.applyRules(function(log){
 if(!log.hasErrors){
 document.getElementById('montlyPayment').value =
mortgage.PaymentSummary.MonthlyPayment.toFixed(2);
 document.getElementById('totalCost').value =
mortgage.PaymentSummary.TotalCost.toFixed(2);
 }
 else{
 console.log(log.runtimeErrors.join('\n'));
 }
 });
 }
 </script>