Modifying the default accordion svg icon in Bootstrap 5: A comprehensive guide

Looking to customize the bootstrap icon for accordions

Instead of the standard arrow icon, I want to utilize the 

<i class="bi bi-plus-circle"></i>
and 
<i class="bi bi-dash-circle"></i>
bootstrap icons.

One icon for collapsed accordion and the other for expanded accordion.

Expected outcome:

https://i.sstatic.net/BhYPJ.png

Current outcome:

https://i.sstatic.net/D8rFb.png

It seems the default arrow icon is set as a background image:

.accordion-button::after {
    background-image: url(data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%23212529'%3e%3cpath fill-rule='evenodd' d='M1.646 4.646a.5.5 0 0 1 .708 0L8 10.293l5.646-5.647a.5.5 0 0 1 .708.708l-6 6a.5.5 0 0 1-.708 0l-6-6a.5.5 0 0 1 0-.708z'/%3e%3c/svg%3e);

}

Upon toggling, the background image is rotated 180 degrees:

.accordion-button:not(.collapsed)::after {
    background-image: url(data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%230c63e4'%3e%3cpath fill-rule='evenodd' d='M1.646 4.646a.5.5 0 0 1 .708 0L8 10.293l5.646-5.647a.5.5 0 0 1 .708.708l-6 6a.5.5 0 0 1-.708 0l-6-6a.5.5 0 0 1 0-.708z'/%3e%3c/svg%3e);
    transform: rotate(
-180deg);
}

To replace the current SVG with the bootstrap icon SVG, try the following:

.accordion-button::after {
    order: -1;
    margin-left: 0;
    margin-right:0.5em;
    background-image: url(data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%23212529' fill-rule='evenodd' d='M8 15A7 7 0 1 1 8 1a7 7 0 0 1 0 14zm0 1A8 8 0 1 0 8 0a8 8 0 0 0 0 16z' d='M8 4a.5.5 0 0 1 .5.5v3h3a.5.5 0 0 1 0 1h-3v3a.5.5 0 0 1-1 0v-3h-3a.5.5 0 0 1 0-1h3v-3A.5.5 0 0 1 8 4z'/%3e%3c/svg%3e);
    background-color: white;
}

If this doesn't work, consider if there's a better approach to achieve the desired result. Check out the LIVE JS FIDDLE for experimentation with different bootstrap icon SVG codes.

csstwitter-bootstrapsvgbootstrap-5

Answer №1

I solved the issue by encoding the bootstrap icons svg's to use as a css background-image.

Here is an online tool I came across for encoding.

With this code snippet:

.accordion-button::after {
    order: -1;
    margin-left: 0;
    margin-right:0.5em;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='currentColor' class='bi bi-plus-circle' viewBox='0 0 16 16'%3E%3Cpath d='M8 15A7 7 0 1 1 8 1a7 7 0 0 1 0 14zm0 1A8 8 0 1 0 8 0a8 8 0 0 0 0 16z'/%3E%3Cpath d='M8 4a.5.5 0 0 1 .5.5v3h3a.5.5 0 0 1 0 1h-3v3a.5.5 0 0 1-1 0v-3h-3a.5.5 0 0 1 0-1h3v-3A.5.5 0 0 1 8 4z'/%3E%3C/svg%3E");
    background-color: white;
}

And it's working perfectly now!

Answer №2

Give this solution a try, it worked for me!

.accordion-button:not(.collapsed)::after {
background-color: #d2153d;
background-image: url("/img/Home/FAQ/arrow-up.png");
transform: rotate(360deg);
background-size: auto;
background-position: center;
}

.accordion-button.collapsed::after {
background-image: url("/img/Home/FAQ/arrow-down.png");
background-size: auto;
background-position: center;
}

.accordion-button:not(.collapsed) {
color: #ffffff;
background-color: #d2153d;
}

Answer №3

Consider Sass:

If you're utilizing sass, Bootstrap 5 introduces sass variables for accordion icon states that are customizable:

$accordion-button-icon:         url("data:image/svg+xml,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='#{$accordion-icon-color}'><path fill-rule='evenodd' d='M1.646 4.646a.5.5 0 0 1 .708 0L8 10.293l5.646-5.647a.5.5 0 0 1 .708.708l-6 6a.5.5 0 0 1-.708 0l-6-6a.5.5 0 0 1 0-.708z'/></svg>");
$accordion-button-active-icon:  url("data:image/svg+xml,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='#{$accordion-icon-active-color}'><path fill-rule='evenodd' d='M1.646 4.646a.5.5 0 0 1 .708 0L8 10.293l5.646-5.647a.5.5 0 0 1 .708.708l-6 6a.5.5 0 0 1-.708 0l-6-6a.5.5 0 0 1 0-.708z'/></svg>");

https://getbootstrap.com/docs/5.1/components/accordion/#variables

Bootstrap 5 also offers an escape_svg function to escape SVG characters.

Follow the instructions on including your variable overrides here: https://getbootstrap.com/docs/5.1/customize/sass/#variable-defaults

It may seem like a big task initially, but once configured with sass, modifying and extending Bootstrap components becomes more manageable.

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