hide open/active accordion when another accordion is clicked - Jquery

PramodGangadar
August 15, 2022
164 views
5 votes
5 Answers

I suspect the issue is with the line const active = document.querySelector(".accordion.active"); in JS code below. It doesn’t seem to be retrieving that element. Could you please help me debug it? Or should I use something else instead of querySelector? It is also found that this.classList.add("active"); is not adding the "active class" to the accordion element when it is clicked.

document.addEventListener("DOMContentLoaded", function(event) {
  var acc = document.getElementsByClassName("accordion");
  var i;
  for (i = 0; i < acc.length; i++) {
    acc[i].addEventListener("click", function() {
      const active = document.querySelector(".accordion.active");
      console.log(active);
      if (active) {
        active.classList.remove('active'); // remove active class from accordions
      }
      this.classList.add("active"); // add it to this one
      
      this.classList.toggle("active");
      var panel = this.nextElementSibling;
      if (panel.style.display === "block") {
        panel.style.display = "none";
      } else {
        panel.style.display = "block";
      }
    });
  }
});

.accordion {
  background-color: #eee;
  color: #444;
  cursor: pointer;
  padding: 1.5rem;
  width: 100%;
  border: none;
  text-align: left;
  outline: none;
  font-size: 15px;
  transition: 0.4s;
}

.active,
.accordion:hover {
  background-color: #ccc;
}

.panel {
  padding: 0 18px;
  display: none;
  background-color: white;
  overflow: hidden;
  background: red;
}

.active+.panel {
  display: block;
}

<div class="row">
  <button class="accordion"><div class="question"><?php echo $label; ?></div></button>
  <div class="panel">
    <p class="answer">
      <?php echo $answer; ?>
    </p>
    </br>
  </div>
</div>
<div class="row">
  <button class="accordion"><div class="question"><?php echo $label; ?></div></button>
  <div class="panel">
    <p class="answer">
      <?php echo $answer; ?>
    </p>
    </br>
  </div>
</div>

Answers

You don’t need to manipulate the display of the active element, your CSS already does that. Also you should not both add and toggle the active class on this – that is equivalent to removing it.

I’ve also added an if statement to check if the clicked element is already active so that collapsing it again works.

document.addEventListener("DOMContentLoaded", function(event) {
  var acc = document.getElementsByClassName("accordion");
  var i;
  for (i = 0; i < acc.length; i++) {
    acc[i].addEventListener("click", function() {
      const active = document.querySelector(".accordion.active");
      console.log(active);
      if (active) {
        active.classList.remove('active'); // remove active class from accordions
      }

      if (active !== this) {
        this.classList.toggle("active");
      }
    });
  }
});

.accordion {
  background-color: #eee;
  color: #444;
  cursor: pointer;
  padding: 1.5rem;
  width: 100%;
  border: none;
  text-align: left;
  outline: none;
  font-size: 15px;
  transition: 0.4s;
}

.active,
.accordion:hover {
  background-color: #ccc;
}

.panel {
  padding: 0 18px;
  display: none;
  background-color: white;
  overflow: hidden;
  background: red;
}

.active+.panel {
  display: block;
}

<div class="row">
  <button class="accordion"><div class="question">Label1</div></button>
  <div class="panel">
    <p class="answer">
      Answer goes here
    </p>
  </div>
</div>
<div class="row">
  <button class="accordion"><div class="question">Label2</div></button>
  <div class="panel">
    <p class="answer">
      Second answer
    </p>
  </div>
</div>

I always prefer delegation.

I am wrapping the accordion in a DIV and delegate the clicks from there

No need to show / hide the panes since the CSS .active+.panel { display: block; } does that for us

document.addEventListener("DOMContentLoaded", function(event) { // when page has loaded
  const acc = document.getElementById("accodionContainer"); // the container
  const buttons = acc.querySelectorAll(".accordion");       // the buttons in the container
  acc.addEventListener("click", e => { // any click in the container
    const currentButton = e.target.closest(".accordion"); // you have stuff inside the relevant element, make sure we use the .accordion element
    if (!currentButton) return // something not a (in a ) button was clicked
    // toggle clicked button, remove active from the rest
    buttons.forEach(acc =>  acc.classList[acc === currentButton ? "toggle" : "remove"]("active"));
  });
});

.accordion {
  background-color: #eee;
  color: #444;
  cursor: pointer;
  padding: 1.5rem;
  width: 100%;
  border: none;
  text-align: left;
  outline: none;
  font-size: 15px;
  transition: 0.4s;
}

.active,
.accordion:hover {
  background-color: #ccc;
}

.panel {
  padding: 0 18px;
  display: none;
  background-color: white;
  overflow: hidden;
}

.active+.panel {
  display: block;
}

.accordion.active span::after {
  content: "➖";
}

.accordion span::after {
  content: "➕";
}

<div id="accodionContainer">
  <div class="row">
    <button class="accordion"><span></span> Question 1</button>
    <div class="panel">
      <p class="answer">
        Answer 1
      </p>
    </div>
  </div>
  <div class="row">
    <button class="accordion"><span></span> Question 2</button>
    <div class="panel">
      <p class="answer">
        Answer 2
      </p>
    </div>
  </div>
</div>

this.classList.add("active"); is not adding the "active class" to the accordion element when it is clicked.

It is adding. But immediately the class is toggled, so it is removed. That toogle class line is commented.

I have added the css for green color to active accordion, which you can see after moving the cursor off the accordion element.

document.addEventListener("DOMContentLoaded", function(event) {
  var acc = document.getElementsByClassName("accordion");
  var i;
  for (i = 0; i < acc.length; i++) {
    acc[i].addEventListener("click", function() {
      const active = document.querySelector(".accordion.active");
      console.log(active);
      if (active) {
        active.classList.remove('active'); // remove active class from accordions
        // this is if other heading is clicked
      }
      
      
     // this.classList.toggle("active");  // not needed
      var panel = this.nextElementSibling;
      if (panel.style.display === "block") {
      this.classList.remove("active"); // remove it to this one
        panel.style.display = "none";
      } else {
      this.classList.add("active"); // add it to this one
        panel.style.display = "block";
      }
    });
  }
});

.accordion {
  background-color: #eee;
  color: #444;
  cursor: pointer;
  padding: 1.5rem;
  width: 100%;
  border: none;
  text-align: left;
  outline: none;
  font-size: 15px;
  transition: 0.4s;
}
.accordion.active{
  background:green;
}

.active,
.accordion:hover {
  background-color: #ccc;
}

.panel {
  padding: 0 18px;
  display: none;
  background-color: white;
  overflow: hidden;
  background: red;
}

.active+.panel {
  display: block;
}

<div class="row">
  <button class="accordion"><div class="question">Accordion Label 1</div></button>
  <div class="panel">
    <p class="answer">
      Accordion Answer 1
    </p>
    </br>
  </div>
</div>
<div class="row">
  <button class="accordion"><div class="question">Accordion Label 2</div></button>
  <div class="panel">
    <p class="answer">
      Accordion Answer 1
    </p>
    </br>
  </div>
</div>

The below answer is not related to the question, but it is good to have the html hierarchy.

const accordionToggles = document.querySelectorAll('.accordion-toggle');
const accordionItems = document.querySelectorAll('.accordion-item');
const flush = true; // set to true,if only one accordion bodyto be open. set false, to open multiple accordion-body
accordionToggles.forEach((toggleBtn) => {
  toggleBtn.addEventListener('click', (event) => {
    const accordionItem = event.target.closest(".accordion-item");
    if (!flush) {
      accordionItem.classList.toggle('active');
      return;
    }
    if (accordionItem.classList.contains('active')) {
      accordionItem.classList.toggle('active');
      return;
    }
    accordionItems.forEach((item) => {
      item.classList.remove('active');
    })
    accordionItem.classList.add('active');
  })

});

.accordion {}

.accordion-item {
  border: 1px solid gray;
}

.accordion-item+.accordion-item {
  border-top: none;
}

.accordion-header {}

.accordion-toggle {
  width: 100%;
  border: none;
  height: 30px;
  border-bottom: 1px solid black;
  text-align: left;
  position: relative;
}

.accordion-toggle:after {
  position: absolute;
  top: 5px;
  right: 5px;
  font-size: 18px;
}

.accordion-body {
  padding: 10px;
  display: none;
}

.accordion-item.active .accordion-body {
  display: block;
}

.accordion-item .accordion-toggle:after {
  content: "+"
}

.accordion-item.active .accordion-toggle:after {
  content: "-"
}

<div class="accordion">
  <div class="accordion-item">
    <div class="accordion-header">
      <button class="accordion-toggle">Title 1</button>
    </div>
    <div class="accordion-body">
      Accordion Content 1
    </div>
  </div>
  <div class="accordion-item">
    <div class="accordion-header">
      <button class="accordion-toggle">Title 2</button>
    </div>
    <div class="accordion-body">
      Accordion Content 2
    </div>
  </div>
</div>

You probably should re-think your approach since in your case, you will not even be in need of JavaScript – for the basics! If you need a custom accordion, then you can use JavaScript, and I try to explain to you how.

What you need is a clean HTML with <details> and <summary>. See this example:

<details class="accordion">
  <summary>Question 1</summary>
  <strong>Answer:</strong> Lorem ipsum dolor sit amet, consectetur adipisicing elit. Delectus molestias ex, rem ducimus quibusdam nihil aliquam corporis id sint aperiam dolores, accusantium culpa adipisci similique doloremque eius reiciendis. Veniam, perferendis.
</details>
<details class="accordion">
  <summary>Question 2</summary>
  <strong>Answer:</strong> Lorem ipsum dolor sit amet, consectetur adipisicing elit. Laborum doloribus tenetur tempore esse consectetur incidunt, distinctio eaque suscipit error fugit tempora, quas accusantium recusandae autem voluptatibus qui quasi molestiae odit.
</details>

With CSS you can style it the way you want it. If you want to remove the arrows, you can try it with details > summary { list-style: none; }. Also, you can use any other characters. In this example, we use the signs + (plus) and when the accordion is already opened, it should be – (minus.):

details > summary {
  list-style-type: '+ ';
}
details[open] > summary {
  list-style-type: "- ";
}
details > summary::-webkit-details-marker {
  display: none;
}

summary {
  background-color: #ccc;
}

<details class="accordion">
  <summary>Question 1</summary>
  <strong>Answer:</strong> Lorem ipsum dolor sit amet, consectetur adipisicing elit. Delectus molestias ex, rem ducimus quibusdam nihil aliquam corporis id sint aperiam dolores, accusantium culpa adipisci similique doloremque eius reiciendis. Veniam, perferendis.
</details>
<details class="accordion">
  <summary>Question 2</summary>
  <strong>Answer:</strong> Lorem ipsum dolor sit amet, consectetur adipisicing elit. Laborum doloribus tenetur tempore esse consectetur incidunt, distinctio eaque suscipit error fugit tempora, quas accusantium recusandae autem voluptatibus qui quasi molestiae odit.
</details>

As you can see, all open questions remain open. If you want only the active question to stay open, you may use JavaScript.

document.querySelectorAll('details').forEach((accordion) => {
  accordion.addEventListener('click', (e) => {
    document.querySelectorAll('details').forEach((event) => {
      if (accordion !== event) {
        event.removeAttribute('open');
      }
    });
  });
});

details > summary {
  list-style-type: '+ ';
}
details[open] > summary {
  list-style-type: "- ";
}
details > summary::-webkit-details-marker {
  display: none;
}

summary {
  background-color: #ccc;
}

<details class="accordion">
  <summary>Question 1</summary>
  <strong>Answer:</strong> Lorem ipsum dolor sit amet, consectetur adipisicing elit. Delectus molestias ex, rem ducimus quibusdam nihil aliquam corporis id sint aperiam dolores, accusantium culpa adipisci similique doloremque eius reiciendis. Veniam, perferendis.
</details>
<details class="accordion">
  <summary>Question 2</summary>
  <strong>Answer:</strong> Lorem ipsum dolor sit amet, consectetur adipisicing elit. Laborum doloribus tenetur tempore esse consectetur incidunt, distinctio eaque suscipit error fugit tempora, quas accusantium recusandae autem voluptatibus qui quasi molestiae odit.
</details>

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hide open/active accordion when another accordion is clicked – Jquery

Answers