OpenSouce-LNMIIT · RuhanRK · Oct 3, 2018
diff --git a/loan-calc/README.md b/loan-calc/README.md
@@ -0,0 +1,3 @@
+## Handy Loan Calculator
+
+**here is the link** [Calc](https://ruhanrk.github.io/loan-calc/).
diff --git a/loan-calc/css/style.css b/loan-calc/css/style.css
@@ -0,0 +1,19 @@
+@import url('https://fonts.googleapis.com/css?family=Merienda');
+@import url('https://fonts.googleapis.com/css?family=Satisfy');
+
+#loading,
+#results{
+    display: none;
+}
+
+.card2{
+    background-color: transparent;
+}
+
+.heading{
+    font-family: 'Merienda', cursive;
+}
+.submits{
+    font-family: 'Satisfy', cursive;
+    font-size: 25px;
+}
diff --git a/loan-calc/img/favicon.ico b/loan-calc/img/favicon.ico
diff --git a/loan-calc/img/loading.gif b/loan-calc/img/loading.gif
diff --git a/loan-calc/index.html b/loan-calc/index.html
@@ -0,0 +1,91 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <meta http-equiv="X-UA-Compatible" content="ie=edge">
+    <!-- Favicon -->
+    <link href="img/favicon.ico" rel="icon" type="image/x-icon" />
+    <!-- Bootstrap CSS -->
+    <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.css">
+    <!-- Own css -->
+    <link rel="stylesheet" href="css/style.css">
+    <title>Loan Calculator</title> 
+</head>
+<body class="bg-secondary">
+    <div class="container">
+        <div class="row">
+            <div class="col-md-6 mx-auto">
+            <div class="card card1 card-body text-center mt-5">
+                <h3 class="heading pb-2 pt-1 mb-3 shadow bg-white rounded border border-dark">Loan Calculator</h3>
+                <form id="loan-form">
+                    <div class="form-group">
+                        <div class="input-group">
+                        <span class="input-group-text">₹</span>
+                        <input type="number" class="form-control" id="amount" placeholder="Loan Amount">
+                    </div>
+                    </div>
+                    <div class="form-group">
+                        <div class="input-group">
+                            <span class="input-group-text">%</span>
+                            <input type="number" class="form-control" id="interest" placeholder="Interest">
+                        </div>
+                    </div>
+                    <div class="form-group">
+                        <input type="number" class="form-control" id="years" placeholder="Years to pay">
+                    </div>
+                    <div class="form-group">
+                        <input type="submit" value="Calculate" class="btn btn-info btn-block submits">
+                    </div>
+                </form>
+            </div>
+        </div>
+        </div>
+    </div>
+
+    <div class="container result">
+        <div class="row">
+            <div class="col-md-6 mx-auto">
+            <div class="card card2 card-body text-center mt-5">
+
+                <!-- LOADER -->
+                <div id="loading">
+                    <img src="img/loading.gif" alt="">
+                </div>
+                <!-- RESULTS -->
+                <div id="results" class="pt-1 ">
+                    <h5 class="badge badge-dark p-3 mb-3">Results</h5>
+                    <div class="form-group">
+                    <div class="input-group">
+                        <span class="input-group-text">Monthly Payment</span>
+                        <input type="number" class="form-control" id="monthly-payment" disabled>
+                    </div>
+                    </div>
+
+                    <div class="form-group">
+                    <div class="input-group">
+                        <span class="input-group-text">Total Payment</span>
+                        <input type="number" class="form-control" id="total-payment" disabled>
+                    </div>
+                    </div>
+
+                    <div class="form-group">
+                    <div class="input-group">
+                        <span class="input-group-text">Total Interest</span>
+                        <input type="number" class="form-control" id="total-interest" disabled>
+                    </div>
+                    </div>
+                </div>
+            </div>
+        </div>
+        </div>
+    </div>
+    <!-- Optional JavaScript -->
+    <!-- jQuery first, then Popper.js, then Bootstrap JS -->
+    <script src="https://code.jquery.com/jquery-3.3.1.slim.min.js"></script>
+    <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.3/umd/popper.min.js" ></script>
+    <script src="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/js/bootstrap.min.js"></script>
+    <!-- own JS -->
+    <script src="js/app.js"></script>
+</body>
+</html>
diff --git a/loan-calc/js/app.js b/loan-calc/js/app.js
@@ -0,0 +1,75 @@
+// all UI value
+
+const amount = document.getElementById('amount');
+const interest = document.getElementById('interest');
+const year = document.getElementById('years');
+
+const monthlyPayment = document.getElementById('monthly-payment');
+const totalPayment = document.getElementById('total-payment');
+const totalInterest = document.getElementById('total-interest');
+
+const calculateInterest = document.getElementById('loan-form');
+
+const loader = document.getElementById('loading');
+const results = document.querySelector('#results');
+const card2 = document.querySelector('.card2');
+
+// Show error
+const showError = function(error){
+    //show loader
+    loader.style.display = 'none';
+    card2.style.backgroundColor  = "transparent";
+    const errorDiv = document.createElement('div');
+    const card = document.querySelector('.card1');
+    const heading = document.querySelector('.heading');
+
+    errorDiv.className = 'alert alert-danger mb-3';
+
+    errorDiv.appendChild(document.createTextNode(error));
+
+    card.insertBefore(errorDiv, heading);
+
+    setTimeout(function(){
+        document.querySelector('.alert').remove();
+    },3000)
+}
+
+// calculate function
+const result = function(){
+
+    const principal = parseFloat(amount.value);
+    const calcInterest = parseFloat(interest.value) / 100 / 12;
+    const calcPayment = parseFloat(year.value) * 12;
+
+    //compute monthly payment
+    const x = Math.pow(1 + calcInterest, calcPayment);
+    const monthly = (principal * x * calcInterest) / (x -1);
+
+    if(isFinite(monthly)){
+        monthlyPayment.value = monthly.toFixed(2);
+        totalPayment.value = (monthly * calcPayment).toFixed(2);
+        totalInterest.value = ((monthly * calcPayment) - principal).toFixed(2);
+        //hide result
+        results.style.display = 'block';
+        //show loader
+        loader.style.display = 'none';
+    }
+    else{
+        showError('Input valid Amount');
+    }
+}
+
+
+// calculate event listener
+calculateInterest.addEventListener('submit', function(e){
+    e.preventDefault();
+
+    card2.style.backgroundColor  = "#fff";
+
+    //hide result
+    results.style.display = 'none';
+    //show loader
+    loader.style.display = 'block';
+
+    setTimeout(result, 2000)
+});
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		## Handy Loan Calculator

		here is the link [Calc](https://ruhanrk.github.io/loan-calc/).