Accordion / FAQ Section | HTML, CSS & JavaScript

Accordion / FAQ with HTML, CSS & JavaScript

30 DAYS 30 PROJECT CHALLENGE

Day #06

Project Overview

An Accordion / FAQ Section built using HTML, CSS, and JavaScript that allows users to expand and collapse content sections smoothly.
The project improves content readability by showing only relevant information at a time, making it ideal for FAQs, help sections, and documentation pages.

Key Features

Expand and collapse FAQ items with a click.
Smooth open/close animation for better user experience.
Allows only one item open at a time for clarity.
Clear visual indicators for open and closed states.
Clean, minimal, and responsive design.
Easy to customize and reuse across projects.

HTML Code

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8" />
  <meta name="viewport" content="width=device-width, initial-scale=1.0"/>
  <title>Accordion / FAQ</title>
  <link rel="stylesheet" href="style.css" />
</head>
<body>

  <div class="faq-container">
    <h2>Frequently Asked Questions</h2>

    <div class="faq-item">
      <div class="faq-question">What is an accordion?</div>
      <div class="faq-answer">
        An accordion is a UI component that expands and collapses content sections.
      </div>
    </div>

    <div class="faq-item">
      <div class="faq-question">Is this responsive?</div>
      <div class="faq-answer">
        Yes, this accordion layout is fully responsive on all devices.
      </div>
    </div>

    <div class="faq-item">
      <div class="faq-question">Can multiple items be open?</div>
      <div class="faq-answer">
        No, only one item opens at a time for better readability.
      </div>
    </div>

  </div>

  <script src="script.js"></script>
</body>
</html>

CSS Code

* {
  box-sizing: border-box;
  font-family: "Segoe UI", sans-serif;
}

body {
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  background: #042453;
}

.faq-container {
  background: #ffffff;
  width: 500px;
  padding: 25px;
  border-radius: 12px;
  box-shadow: 0 15px 30px rgba(0,0,0,0.1);
}

h2 {
  text-align: center;
  margin-bottom: 20px;
}

.faq-item {
  border-bottom: 1px solid #e5e7eb;
}

.faq-question {
  padding: 15px;
  cursor: pointer;
  font-weight: 600;
  position: relative;
}

.faq-question::after {
  content: "+";
  position: absolute;
  right: 20px;
  font-size: 20px;
}

.faq-item.active .faq-question::after {
  content: "−";
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  padding: 0 15px;
  color: #555;
  transition: max-height 0.3s ease;
}

.faq-item.active .faq-answer {
  max-height: 100px;
  padding-bottom: 15px;
}

Javascript Code

const faqItems = document.querySelectorAll(".faq-item");

faqItems.forEach(item => {
  const question = item.querySelector(".faq-question");

  question.addEventListener("click", () => {
    faqItems.forEach(i => {
      if (i !== item) {
        i.classList.remove("active");
      }
    });

    item.classList.toggle("active");
  });
});