FAQ Accordion Using HTML CSS JavaScript

If you need to display frequently asked questions (FAQs) on your website in an organized and user-friendly way, creating an interactive accordion is an excellent solution. This tutorial will guide you through building a responsive and accessible FAQ accordion using HTML, CSS, and JavaScript. It helps users quickly find answers without cluttering the page. This implementation provides a clean structure and smooth interactivity for your content.

How to Create an FAQ Accordion Using HTML, CS, and JavaScript

1. Set up the HTML Structure

First, create the basic HTML structure for your FAQ section. This structure includes a container, a main heading, and several accordion items. Each item has a button for the question and a div for the answer.

<div class="container">
  <h2>Frequently Asked Questions</h2>
  <div class="accordion">
    <div class="accordion-item">
      <button id="accordion-button-1" aria-expanded="false"><span class="accordion-title">Why is the moon sometimes out during the day?</span><span class="icon" aria-hidden="true"></span></button>
      <div class="accordion-content">
        <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Elementum sagittis vitae et leo duis ut. Ut tortor pretium viverra suspendisse potenti.</p>
      </div>
    </div>
    <div class="accordion-item">
      <button id="accordion-button-2" aria-expanded="false"><span class="accordion-title">Why is the sky blue?</span><span class="icon" aria-hidden="true"></span></button>
      <div class="accordion-content">
        <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Elementum sagittis vitae et leo duis ut. Ut tortor pretium viverra suspendisse potenti.</p>
      </div>
    </div>
    <div class="accordion-item">
      <button id="accordion-button-3" aria-expanded="false"><span class="accordion-title">Will we ever discover aliens?</span><span class="icon" aria-hidden="true"></span></button>
      <div class="accordion-content">
        <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Elementum sagittis vitae et leo duis ut. Ut tortor pretium viverra suspendisse potenti.</p>
      </div>
    </div>
    <div class="accordion-item">
      <button id="accordion-button-4" aria-expanded="false"><span class="accordion-title">How much does the Earth weigh?</span><span class="icon" aria-hidden="true"></span></button>
      <div class="accordion-content">
        <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Elementum sagittis vitae et leo duis ut. Ut tortor pretium viverra suspendisse potenti.</p>
      </div>
    </div>
    <div class="accordion-item">
      <button id="accordion-button-5" aria-expanded="false"><span class="accordion-title">How do airplanes stay up?</span><span class="icon" aria-hidden="true"></span></button>
      <div class="accordion-content">
        <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Elementum sagittis vitae et leo duis ut. Ut tortor pretium viverra suspendisse potenti.</p>
      </div>
    </div>
  </div>
</div>
    <script src='https://code.jquery.com/jquery-3.2.1.min.js'></script><script  src="./script.js"></script>

2. Apply CSS Styling

Next, add styles to make your accordion visually appealing and functional. These styles will define the layout, colors, and the animation for opening and closing the accordion sections. The CSS also includes styles for the expand/collapse icon.

@import url("https://fonts.googleapis.com/css?family=Hind:300,400&display=swap");
* {
  box-sizing: border-box;
}
*::before, *::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 0;
  font-family: "Hind", sans-serif;
  background: #fff;
  color: #4d5974;
  display: flex;
  min-height: 100vh;
}

.container {
  margin: 0 auto;
  padding: 4rem;
  width: 48rem;
}

.accordion .accordion-item {
  border-bottom: 1px solid #e5e5e5;
}
.accordion .accordion-item button[aria-expanded=true] {
  border-bottom: 1px solid #03b5d2;
}
.accordion button {
  position: relative;
  display: block;
  text-align: left;
  width: 100%;
  padding: 1em 0;
  color: #7288a2;
  font-size: 1.15rem;
  font-weight: 400;
  border: none;
  background: none;
  outline: none;
}
.accordion button:hover, .accordion button:focus {
  cursor: pointer;
  color: #03b5d2;
}
.accordion button:hover::after, .accordion button:focus::after {
  cursor: pointer;
  color: #03b5d2;
  border: 1px solid #03b5d2;
}
.accordion button .accordion-title {
  padding: 1em 1.5em 1em 0;
}
.accordion button .icon {
  display: inline-block;
  position: absolute;
  top: 18px;
  right: 0;
  width: 22px;
  height: 22px;
  border: 1px solid;
  border-radius: 22px;
}
.accordion button .icon::before {
  display: block;
  position: absolute;
  content: "";
  top: 9px;
  left: 5px;
  width: 10px;
  height: 2px;
  background: currentColor;
}
.accordion button .icon::after {
  display: block;
  position: absolute;
  content: "";
  top: 5px;
  left: 9px;
  width: 2px;
  height: 10px;
  background: currentColor;
}
.accordion button[aria-expanded=true] {
  color: #03b5d2;
}
.accordion button[aria-expanded=true] .icon::after {
  width: 0;
}
.accordion button[aria-expanded=true] + .accordion-content {
  opacity: 1;
  max-height: 9em;
  transition: all 200ms linear;
  will-change: opacity, max-height;
}
.accordion .accordion-content {
  opacity: 0;
  max-height: 0;
  overflow: hidden;
  transition: opacity 200ms linear, max-height 200ms linear;
  will-change: opacity, max-height;
}
.accordion .accordion-content p {
  font-size: 1rem;
  font-weight: 300;
  margin: 2em 0;
}

3. Add JavaScript Functionality

Finally, implement the JavaScript to control the accordion’s behavior. This script will handle the click events on the buttons. It will toggle the `aria-expanded` attribute. This attribute controls which accordion item is open or closed.

const items = document.querySelectorAll(".accordion button");

function toggleAccordion() {
  const itemToggle = this.getAttribute('aria-expanded');
  
  for (i = 0; i < items.length; i++) {
    items[i].setAttribute('aria-expanded', 'false');
  }
  
  if (itemToggle == 'false') {
    this.setAttribute('aria-expanded', 'true');
  }
}

items.forEach(item => item.addEventListener('click', toggleAccordion));

That’s all! You have successfully created a FAQ accordion using HTML, CSS, and JavaScript.