Bootstrap utility classes
Z-index
NOTE
These were added in Bootstrap 5.3.
z-3, z-2, z-1, z-0, z-n1
See Z-index in the Bootstrap documentation.
Typography
Text decoration
html
<p class="text-decoration-underline">Underlined</p>
<p class="text-decoration-line-through">Strikethrough'd</p>
<a href="#" class="text-decoration-none">Link without decoration</a>See Text decoration in the Bootstrap documentation.
Interactions
Text selection
html
<p class="user-select-all">Instantly select everything</p>
<p class="user-select-auto">Default</p>
<p class="user-select-none">None</p>See Text selection in the Bootstrap documentation.
Pointer events
html
<a href="#" class="pe-none">This link</a> can not be clicked.
<a href="#" class="pe-auto">This link</a> can be clicked (this is default behavior).See Pointer events in the Bootstrap documentation.
Border
To add or remove borders:
html
<span class="border"></span>
<span class="border-top"></span>
<span class="border-end"></span>
<span class="border-bottom"></span>
<span class="border-start"></span>
<span class="border border-0"></span>
<span class="border border-top-0"></span>
<span class="border border-end-0"></span>
<span class="border border-bottom-0"></span>
<span class="border border-start-0"></span>To color or set opacity on a border:
html
<div class="border border-success p-2 mb-2 border-opacity-50">This is 50% opacity success border</div>Opacity
html
<div class="opacity-100">...</div>
<div class="opacity-75">...</div>
<div class="opacity-50">...</div>
<div class="opacity-25">...</div>
<div class="opacity-0">...</div>See Opacity in the Bootstrap documentation.
Vertical align
html
<span class="align-baseline">baseline</span>
<span class="align-top">top</span>
<span class="align-middle">middle</span>
<span class="align-bottom">bottom</span>
<span class="align-text-top">text-top</span>
<span class="align-text-bottom">text-bottom</span>Position
html
<!-- Set position: whatever -->
<div class="position-static">...</div>
<div class="position-relative">...</div>
<div class="position-absolute">...</div>
<div class="position-fixed">...</div>
<div class="position-sticky">...</div>
<!-- Set top, left etc. 0 = 0%, 50 = 50%, 100 = 100% -->
<div class="position-absolute top-0 end-0"></div>
<div class="position-absolute top-50 start-50"></div>
<div class="position-absolute bottom-100 end-100"></div>