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menu_book Course Curriculum (Bootstrap 5) expand_more

Layout & Grid

Containers Responsive containers Rows Columns Auto columns Responsive columns Gutters Offsets Order utilities CSS Grid option

Content & Helpers

Reboot Typography Images Tables Figures Vertical rule Stretched link Text truncation Ratio helper Visually hidden

Forms

Form controls Form text Select menus Checks and radios Range inputs Input groups Floating labels Form layout Validation Datalists

Utilities

Spacing utilities Display utilities Flex utilities Grid gap utilities Position utilities Sizing utilities Text utilities Background utilities Border utilities Opacity utilities

Components I

Accordion Alerts Badges Breadcrumb Buttons Button groups Cards Carousel Close button Collapse

Components II

Dropdowns List group Modal Navbar Navs and tabs Offcanvas Pagination Placeholders Popovers Progress

Components III

Scrollspy Spinners Toasts Tooltips Colored links Focus ring helper Icon link helper Stacks helper Object fit utilities Interactions utilities

Customization & JS

CSS variables Sass variables Color modes Utility API Breakpoints JavaScript without jQuery Data attributes Programmatic plugin API Popper integration Bootstrap 4 to 5 migration

Bootstrap 5 / Utilities

Opacity utilities

Learn Opacity utilities in Bootstrap 5 with a focused explanation, a topic-specific example, edge guidance, and a mastery check.

12 min read • Intermediate

bootstrap-040.html

html

<div class="opacity-50">50% opacity</div>

What to watch

Content source & attribution

Original Syntaxis Content · Original Syntaxis Content

Lesson quizzes

Opacity utilities Mastery Check →

Border utilities