How to set horizontal aligned accordion in Bootstrap 4 ?

Last Updated : 30 Dec, 2019
Accordion vertical is quite popular in web development, but horizontal accordion is required in few cases to that in this article we will use pointer-events. We will take the writing-mode to change the accordion title view. And use the transform to rotate the whole accordion.
Below program illustrates the above approach:
Program:
<!DOCTYPE html> 
<html> 
  
<head> 
    <title>Horizontal Acordion</title> 
    <link href= 
"https://stackpath.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css" 
          rel="stylesheet" /> 
    <link href= 
"https://stackpath.bootstrapcdn.com/bootstrap/4.1.0/css/bootstrap.min.css" 
          rel="stylesheet" /> 
    <script src= 
"https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"> 
    </script> 
    <script src= 
"https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.0/umd/popper.min.js"> 
    </script> 
    <script src= 
"https://stackpath.bootstrapcdn.com/bootstrap/4.1.0/js/bootstrap.min.js"> 
    </script> 
    <style> 
        .accordion { 
            text-align: center; 
        } 
          
        .accordion.width { 
            display: flex; 
            width: 200px; 
        } 
          
        .accordion.width .card { 
            flex-direction: row; 
            min-width: min-content; 
        } 
          
        .accordion.width .card .card-header { 
            cursor: pointer; 
            transform: rotate(180deg); 
            writing-mode: vertical-rl; 
            background-color: #0F9D58; 
            border: 2px solid black; 
        } 
          
        .card-body { 
            width: 200px; 
            background-color: ; 
        } 
          
        .collapsing.width { 
            transition: width 0.5s ease; 
            height: auto; 
            width: 10px; 
        } 
          
        h1 { 
            color: green; 
        } 
    </style> 
</head> 
  
<body> 
    <center> 
  
        <!-- Header and tgas -->
        <h1>GeeksforGeeks</h1> 
        <b>A Computer Science Portal for Geeks</b> 
        <p>A Horizontal Acordion</p> 
        <div class="accordion width"
             id="accordionHorizontalExample"> 
  
            <!-- Accordion group creating-->
            <div class="card"> 
                <div class="card-header"
                     data-toggle="collapse" 
                     data-target="#collapseOne"> 
                    Accordion Slide 1 
                </div> 
                <div id="collapseOne"
                     class="collapse show width" 
                     data-parent="#accordionHorizontalExample"> 
                    <div class="card-body"> 
                        If you like GeeksforGeeks and would like 
                      to contribute you can also write an article  
                      using contribute.geeksforgeeks.org 
                    </div> 
                </div> 
            </div> 
            <div class="card"> 
                <div class="card-header"
                     data-toggle="collapse"
                     data-target="#collapseTwo"> 
                    Accordion Slide 2 
                </div> 
                <div id="collapseTwo"
                     class="collapse width" 
                     data-parent="#accordionHorizontalExample"> 
                    <div class="card-body"> 
                        If you like GeeksforGeeks and would like 
                      to contribute you can also write an article  
                      using contribute.geeksforgeeks.org 
                    </div> 
                </div> 
                <div class="card"> 
                    <div class="card-header"
                         data-toggle="collapse" 
                         data-target="#collapseThree"> 
                        Accordion Slide 3 
                    </div> 
                    <div id="collapseThree" 
                         class="collapse width" 
                         data-parent="#accordionHorizontalExample"> 
                        <div class="card-body"> 
                            If you like GeeksforGeeks and would like 
                          to contribute you can also write an article 
                          using contribute.geeksforgeeks.org 
                        </div> 
                    </div> 
                </div> 
                <script> 
                    var horizontalAccordions = $(".accordion.width"); 
  
                    horizontalAccordions.each(function() { 
                        var accordion = $(this); 
                        var collapse = accordion.find(".collapse"); 
                        var bodies = collapse.find("> *"); 
                        accordion.height(accordion.height()); 
                        bodies.width(bodies.eq(0).width()); 
                        collapse.not(".show").each(function() { 
                            $(this).parent().find("[data-toggle='collapse']") 
                                .addClass("collapsed"); 
                        }); 
                    }); 
                </script> 
          </div> 
      </div> 
    </center> 
</body> 
  
</html>   
Output:
Before Clicking Accordion:
After Clicking Accordion:
My Personal Notes
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