Can you explain the steps to changing the background color of a specific element?

I am currently working on implementing a Bootstrap accordion in my application. The parent element of the accordion has a background color set, however, when I expand the accordions, it increases the height of the page and the background color does not cover the extended area.

Here is my HTML structure:

<div id='wrapper>
<accordion id='accordion' close-others="false">
    <accordion-group>
        <accordion-heading >
            <h2 class='title'>Title 1</h2>
        </accordion-heading>
        <div id="first" class="panel-collapse collapse in">
            //contents...
        </div>
    </accordion-group>
  //I have 5 to 6 accordion group. 
</accordion>
</div>

Regarding the CSS, here is what I have tried:

//I initially used height:100% which worked well upon initial loading but caused issues after expanding the accordions.

#wrapper{
    background-color: red;
    height: 100%;  
    display: block;
}

If anyone has any insights or suggestions on how to address this issue, your help would be greatly appreciated. Thank you!

Answer №1

After reviewing the official documentation, I came across the event shown.bs.collapse, which triggers when a collapsed element becomes visible to the user (waits for CSS transitions to finish).

This event is fired once the collapse animation completes and the element appears.

You can utilize this event in your code like so:

$('#myCollapsible').on('shown.bs.collapse', function () {
    document.getElementById('wrapper').style.backgroundColor="red";
})

If the above does not work, you might want to attempt using show.bs.collapse instead.

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