Help needed with displaying results on the same page for an online calculator I'm creating.
Why are the results not showing up as expected?
I want users to input 4 pieces of information, have the logic executed, and then display the answers below the page... How do I achieve this?
function calculate(event) {
event.preventDefault(); // prevent form submission from reloading the page
// Get input values
const name = document.getElementById('name').value;
const age = parseInt(document.getElementById('age').value);
const yearsToRetire = parseInt(document.getElementById('years-to-retire').value);
const passiveIncome = parseInt(document.getElementById('passive-income').value);
// Calculate results
const inflationRate = 0.025;
const yearsToInvest = yearsToRetire - (age >= 60 ? 0 : yearsToRetire);
const passiveIncomeTarget = passiveIncome / 0.95;
const futureValueTarget = passiveIncomeTarget * ((1 + inflationRate) ** yearsToInvest);
// Prepare result strings
const passiveIncomeTargetFormatted = formatCurrency(passiveIncomeTarget);
const futureValueTargetFormatted = formatCurrency(futureValueTarget);
// Display results
const resultsDiv = document.getElementById('results');
resultsDiv.innerHTML = `
<h2>Results for ${name}</h2>
<p>Your target passive income is <strong>${passiveIncomeTargetFormatted}</strong> per year.</p>
<p>To achieve this, you need to have a total of <strong>${futureValueTargetFormatted}</strong> in investments.</p>
`;
}
function formatCurrency(amount) {
return '$' + amount.toLocaleString('en-US', {
minimumFractionDigits: 0,
maximumFractionDigits: 0
});
}
const form = document.getElementById('calculator');
form.addEventListener('submit', calculate);body {
font-family: Arial, sans-serif;
}
.container {
max-width: 800px;
margin: 0 auto;
padding: 20px;
text-align: left;
}
h1 {
text-align: center;
font-size: 36px;
margin-bottom: 30px;
}
form {
display: grid;
grid-template-columns: repeat(2, 1fr);
grid-gap: 20px;
margin-bottom: 30px;
}
label {
font-size: 18px;
margin-bottom: 5px;
}
input[type="number"],
input[type="text"] {
font-size: 18px;
padding: 5px;
border-radius: 5px;
border: 1px solid #ccc;
width: 100%;
}
button[type="submit"] {
font-size: 18px;
background-color: #4CAF50;
color: #fff;
padding: 10px 20px;
border-radius: 5px;
border: none;
cursor: pointer;
transition: background-color 0.2s ease;
}
button[type="submit"]:hover {
background-color: #3e8e41;
}
#results {
display: none;
margin-top: 30px;
font-size: 24px;
}
#results p {
margin: 10px 0;
}
#results table {
width: 100%;
margin-top: 20px;
border-collapse: collapse;
}
#results th,
#results td {
padding: 10px;
border: 1px solid #ccc;
}
#results th {
background-color: #f2f2f2;
font-weight: bold;
text-align: left;
}<div class="container">
<h1>Calc</h1>
<form id="calculator">
<label for="name">Name:</label>
<input type="text" id="name" name="name" required>
<label for="age">Age:</label>
<input type="number" id="age" name="age" min="0" max="120" required>
<label for="yearsToRetire">Years Until Retirement:</label>
<input type="number" id="yearsToRetire" name="yearsToRetire" min="1" max="50" required>
<label for="passiveIncome">Desired Passive Income in Retirement:</label>
<input type="number" id="passiveIncome" name="passiveIncome" min="0" required>
<button onclick="calculate()">Calculate</button>
</form>
<div id="results"></div>
</div>