How to open all the Bootstrap 5 accordions simultaneously without closing the ones that were already open

Question

I have an accordion

How can I open all the accordion items at the same time when clicking on a single Accordion Item?

Let's say we have this scenario:

Accordion Item #1 open

Accordion Item #2 closed

If we click on item #2 or #3, the three accordions will be opened (the Accordion #1 will remain opened) and then if we click again on some Accordion Item, the 3 accordions will close simultaneously.




  
  
    
  
    
      
    
    
      
        This is the first item's accordion body.
      
    
  
  
    
      
    
    
      
        This is the second item's accordion body.
      
    
  
  
    
      
    
    
      
        This is the third item's accordion body.

@nontechguy Answer edited:


   
      
      
   
   
      
         
            
               
            
            
               
                  This is the second item's accordion body. It is hidden by default, until the collapse plugin adds the appropriate classes that we use to style each element. These classes control the overall appearance, as well as the showing and hiding via CSS transitions. You can modify any of this with custom CSS or overriding our default variables. It's also worth noting that just about any HTML can go within the .accordion-body, though the transition does limit overflow.
               
            
         
         
            
               
            
            
               
                  This is the second item's accordion body. It is hidden by default, until the collapse plugin adds the appropriate classes that we use to style each element. These classes control the overall appearance, as well as the showing and hiding via CSS transitions. You can modify any of this with custom CSS or overriding our default variables. It's also worth noting that just about any HTML can go within the .accordion-body, though the transition does limit overflow.
               
            
         
         
            
               
            
            
               
                  This is the third item's accordion body. It is hidden by default, until the collapse plugin adds the appropriate classes that we use to style each element. These classes control the overall appearance, as well as the showing and hiding via CSS transitions. You can modify any of this with custom CSS or overriding our default variables. It's also worth noting that just about any HTML can go within the .accordion-body, though the transition does limit overflow.

user_3160323 · Answer

Hopefully, starting to solve part of your request? All the accordian-items will open and close simultaneously when clicking any accordian-item.


   
      
      
   
   
      
         
            
               
            
            
               
                  This is the second item's accordion body. It is hidden by default, until the collapse plugin adds the appropriate classes that we use to style each element. These classes control the overall appearance, as well as the showing and hiding via CSS transitions. You can modify any of this with custom CSS or overriding our default variables. It's also worth noting that just about any HTML can go within the .accordion-body, though the transition does limit overflow.
               
            
         
         
            
               
            
            
               
                  This is the second item's accordion body. It is hidden by default, until the collapse plugin adds the appropriate classes that we use to style each element. These classes control the overall appearance, as well as the showing and hiding via CSS transitions. You can modify any of this with custom CSS or overriding our default variables. It's also worth noting that just about any HTML can go within the .accordion-body, though the transition does limit overflow.
               
            
         
         
            
               
            
            
               
                  This is the third item's accordion body. It is hidden by default, until the collapse plugin adds the appropriate classes that we use to style each element. These classes control the overall appearance, as well as the showing and hiding via CSS transitions. You can modify any of this with custom CSS or overriding our default variables. It's also worth noting that just about any HTML can go within the .accordion-body, though the transition does limit overflow.

user_9586073 · Answer

I don't think Bootstrap has anything by default for your test case. What you want is to detect the show or hide events on the collapse, and then manually control every accordion. I took the basic example from their documentation, and modified it. Do you want something like this?

const accordion = document.getElementById('accordionExample'),
        accordionCollapses = Array.from(document.querySelectorAll('.accordion-collapse'));

accordionCollapses.forEach((accordionCollapse) => {
  accordionCollapse.addEventListener('show.bs.collapse', (event) => {
    accordionCollapses.forEach((accordionCollapse) => {
      accordionCollapse.className = 'accordion-collapse collapsing';            
      accordionCollapse.style.height = '100%';
      setTimeout(() => accordionCollapse.className = 'accordion-collapse collapse show', 350);
      accordionCollapse.parentElement.querySelector('.accordion-button').className = 'accordion-button';
    });
  });

  accordionCollapse.addEventListener('hide.bs.collapse', (event) => {
    accordionCollapses.forEach((accordionCollapse) => {
      accordionCollapse.className = 'accordion-collapse collapsing';
      accordionCollapse.className = 'accordion-collapse collapse';
      accordionCollapse.parentElement.querySelector('.accordion-button').className = 'accordion-button collapsed';
    });
  });
});




  
    
    Document
    
  

  
    
      
        
          
        
        
          
            Less content
          
        
      
      
        
          
        
        
          
            This is the second item's accordion body. It is hidden by default, until the collapse plugin adds the appropriate classes that we use to style each element. These classes control the overall appearance, as well as the showing and hiding via CSS transitions. You can modify any of this with custom CSS or overriding our default variables. It's also worth noting that just about any HTML can go within the .accordion-body, though the transition does limit overflow. This is the second item's accordion body. It is hidden by default, until the collapse plugin adds the appropriate classes that we use to style each element. These classes control the overall appearance, as well as the showing and hiding via CSS transitions. You can modify any of this with custom CSS or overriding our default variables. It's also worth noting that just about any HTML can go within the .accordion-body, though the transition does limit overflow. This is the second item's accordion body. It is hidden by default, until the collapse plugin adds the appropriate classes that we use to style each element. These classes control the overall appearance, as well as the showing and hiding via CSS transitions. You can modify any of this with custom CSS or overriding our default variables. It's also worth noting that just about any HTML can go within the .accordion-body, though the transition does limit overflow.            
          
        
      
      
        
          
        
        
          
            This is the third item's accordion body. It is hidden by default, until the collapse plugin adds the appropriate classes that we use to style each element. These classes control the overall appearance, as well as the showing and hiding via CSS transitions. You can modify any of this with custom CSS or overriding our default variables. It's also worth noting that just about any HTML can go within the .accordion-body, though the transition does limit overflow.

JSFiddle, if you need.

How to open all the Bootstrap 5 accordions simultaneously without closing the ones that were already open

2 Answers