Step-by-step guide: Creating a captivating triangular shape on the current tab

I am trying to implement a dynamic tab using Bootstrap where clicking on a tab will display a thicker black underline, like in this image:

https://i.stack.imgur.com/h48GB.png

To achieve the black line effect, I have added the following code:

.nav-tabs.nav-justified>.active>a, .nav-tabs.nav-justified>.active>a:focus, .nav-tabs.nav-justified>.active>a:hover {
border-bottom: 2px solid #000;
}

However, I now want to include an upside-down triangle at the bottom of the black line, similar to this image:

https://i.stack.imgur.com/pJovz.png

Is there a way to accomplish this by using CSS? I'm unsure of the correct approach for creating the desired triangle shape and adding it to the selected tab. Any assistance would be greatly appreciated.

Thank you!

htmlcsstabshoverselected

Answer №1

Discover an amazing trick to create a unique triangle shape on the currently active tab!

 .nav-tabs.nav-justified>.active>a:after {
content: '';
width: 0;
height: 0;
border-top: 5px solid #000;
border-right: 5px solid transparent;
border-left: 5px solid transparent;
display: block;
margin: auto;

}

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