accordion switch

Question

The accordion effect I edited on Codepen worked fine. However, when clicking on multiple questions, I want the previous answers to close while the current answer is open. Is there any way to achieve this?

Codepen link here

Also, when using Font Awesome 4.7.0, the following Unicode displays normally.

(f055 & f056) Unicodes

But after switching to Font Awesome 5.14.5, Unicode no longer works.

Answer 1

Turn off other buttons and cycle through all buttons within onclick again. For the font, replace font-family: "FontAwesome"; with font-family: "Font Awesome\ 5 Free";

const accordionBtns = document.querySelectorAll(".accordion");

accordionBtns.forEach((accordion) => {
  accordion.onclick = function() {
    this.classList.toggle("is-open");
    let content = this.nextElementSibling;
    if (content.style.maxHeight) {
      content.style.maxHeight = null;
    } else {
      // add this line
      accordionBtns.forEach(acc => acc.nextElementSibling.style.maxHeight = null)
      content.style.maxHeight = content.scrollHeight + "px";
    }
  };
});

.faq-container {
  width: 80%;
  max-width: 600px;
  margin: 50px auto;
}

button.accordion {
  width: 100%;
  background: #C0C0C0;
  border: none;
  outline: none;
  text-align: left;
  padding: 15px 20px;
  font-size: 18px;
  font-weight: bold;
  color: #4169E1;
  cursor: pointer;
  transition: background-color 2.2s linear;
}

button.accordion:after {
  content: "\f055";
  font-family: "Font Awesome\ 5 Free";
  font-size: 18px;
  float: right;
}

button.accordion.is-open:after {
  content: "\f056";
}

button.accordion:hover,
button.accordion.is-open {
  color: #FFF;
  background: #4169E1;
  /*border-left: 2px solid #C0C0C0;
  border-right: 2px solid #C0C0C0;
  border-top: 2px solid #C0C0C0;
  border-bottom: 2px solid #C0C0C0;*/
}

.accordion-content {
  font-family: Arial;
  font-weight: bold;
  color: #663399;
  background: #FFF;
  border-left: 2px solid #C0C0C0;
  border-right: 2px solid #C0C0C0;
  border-bottom: 2px solid #C0C0C0;
  padding: 0 20px;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.2s ease-in-out;
}

<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/@fortawesome/fontawesome-free@5.15.4/css/all.min.css">

<div class="faq-container">

  <h1 style="text-align: center; font-family: Arial; color: #663399">FAQ Accordion</h1>

  <button class="accordion">When Is It?</button>
  <div class="accordion-content">
    <p>
      On The Date That We Select.
      <br> On The Date That We Select.
    </p>
  </div>

  <button class="accordion">Why Is It.</button>
  <div class="accordion-content">
    <p>
      Because We Chose To.
    </p>
  </div>

  <button class="accordion">Where Is It</button>
  <div class="accordion-content">
    <p>
      At The Place That We Select.
    </p>
  </div>
</div>