How to Add Accordion Without Using Plugin to WordPress Blog

In this quick video tutorial, I will show you how to add Accordion to WordPress blog without using a plugin. In web design, an accordion is a type of menu that displays a list of headers stacked on top of one another. When clicked on, these headers will either reveal or hide associated content.

Table of Contents

How to Add Custom JavaScript Code?

We will use a plugin called Header Footer Code Manager to add custom JavaScript code to WordPress website.

Custom CSS Code

/* Accordion CSS - Begins */
.wpfaccordion {
  background-color: #eee;
  color: #444;
  cursor: pointer;
  padding: 18px;
  width: 100%;
  text-align: left;
  border: none;
  outline: none;
  transition: 0.4s;
.wpfaccordion-active, .wpfaccordion:hover {
  background-color: #cccccc;
.wpfaccordion:hover {
  color: #222222;
.wpfpanel {
  padding: 0 18px;
  background-color: white;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.2s ease-out;
.wpfpanel p {
  margin-top: 15px;
.wpfaccordion:after {
  content: '\02795'; 
  font-size: 13px;
  color: #777;
  float: right;
  margin-left: 5px;
.wpfaccordion-active:after {
  content: "\2796";
/* Accordion CSS - Ends */

Accordion HTML Code Template

<button class="wpfaccordion">Header Content Comes Here</button>
<div class="wpfpanel">
  <p>Inner Content Comes Here</p>

Custom JavaScript Code

var wpfaccordion = document.getElementsByClassName("wpfaccordion");
var i;

for (i = 0; i < wpfaccordion.length; i++) {
  wpfaccordion[i].addEventListener("click", function() {
    var wpfpanel = this.nextElementSibling;
    if ( { = null;
    } else { = wpfpanel.scrollHeight + "px";

The above code snippets is extremely small and it wont have any impact on website’s performance.

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