add lc js

Author: ascott1

.floo

@@ -0,0 +1,3 @@
+{
+    "url": "https://floobits.com/contolini/owning-a-home"
+}

.flooignore

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+#*
+*.o
+*.pyc
+*~
+extern/
+node_modules/
+tmp
+vendor/
+src/vendor
+src/fonts
+static/fonts/
+dist/*
+static/*
+test/compiled_tests.js

src/js/modules/loan-comparison.js

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+var debounce = require('debounce');
+var cost = require('overall-loan-cost');
+var formatUSD = require('format-usd');
+var unFormatUSD = require('unformat-usd');
+var isMoney = require('is-money-usd');
+var amortize = require('amortize');
+
+function updateComparisons() {
+
+  var $monthly = $('#monthly-payment span'),
+      $overall = $('#overall-costs span'),
+      loanInfo = getLoanInfo(),
+      costs = calcCosts( loanInfo );
+
+  $monthly.text( formatUSD(costs.monthlyPayment) );
+  $overall.text( formatUSD(costs.overallCost) );
+
+}
+
+function getLoanInfo() {
+
+  function _sanitizeMoney( val ) {
+    return isMoney( val ) ? unFormatUSD( val ) : 0;
+  }
+
+  return {
+    location: $('#location').val(),
+    creditScore: $('#credit-score-select').val(),
+    amountBorrowed: _sanitizeMoney( $('#house-price-input').val() - $('#down-payment-input').val() ),
+    rateStructure: $('#rate-structure-select').val(),
+    termLength: $('#loan-term-select').val(),
+    loanType: $('#loan-type-select').val(),
+    armType: $('#arm-type-select').val(),
+    rate: $('#interest-rate-select').val()
+  };
+
+}
+
+/**
+ * Calculate loan costs given loan details provided by the user.
+ * @return {object} monthly payment and overall cost of the loan
+ */
+function calcCosts( opts ) {
+
+  var loan,
+      overall;
+
+  opts = opts || {};
+
+  loan = amortize({
+    amount: opts.amountBorrowed,
+    rate: opts.rate,
+    totalTerm: opts.termLength,
+    amortizeTerm: 60
+  });
+
+  overall = cost({
+    amountBorrowed: opts.amountBorrowed,
+    rate: opts.rate,
+    totalTerm: opts.termLength,
+  });
+
+  return {
+    monthlyPayment: loan.payment,
+    overallCosts: overall.overallCost
+  };
+
+}
+
+$('.comparisons').on( 'change', '.recalc', updateComparisons );