Eliminate any trace of Bootstrap 4 design elements on the .card-header

I'm facing some difficulties in removing all the default styling of Bootstrap 4 from the .card component. It seems like this issue might not be directly related to Bootstrap since I am also experiencing it in Edge browser.

Could someone please assist me in getting rid of the blue line that appears on a selected .card-header?

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

I have already attempted different overrides, such as:

.card-header {
    background-color: white;
    border-color: orange;
    border: 1px solid orange;
    padding: 0;
    padding-bottom: 5px;
    text-decoration: none;
}

Your help will be greatly appreciated!

cssbootstrap-4

Answer №1

What you see here is Bootstrap's accessibility styling designed to help users identify where they are currently focused on the user interface. The collapse component you're utilizing also makes use of the card component.

While I wouldn't recommend it, you have the option to remove the accessibility styling in a similar way to removing other styles as demonstrated earlier, but you would need to target the pseudo class.

This particular accessibility styling is accomplished through the pseudo element focus.

You can modify the pseudo properties of a class by adding :focus at the end. In this scenario, the styling applies to a class named .btn. To specifically change buttons within collapsible elements, follow these instructions.


.card .btn:focus {
  box-shadow: none;
}

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