A basic HTML file should look like this:
<!doctype html>
<html lang="en">
<head>
<!-- Required meta tags -->
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<!-- The page supports both dark and light color schemes,
and the page author prefers / default is DARK. -->
<meta name="color-scheme" content="dark light">
<!-- Replace the Bootstrap CSS with the
Bootstrap-Dark Variant CSS -->
<link href="https://cdn.jsdelivr.net/npm/bootstrap-dark-5@1.1.3/dist/css/bootstrap-unlit.min.css" rel="stylesheet">
<title>Hello, world!</title>
<!-- Optional Meta Theme Color is also supported on Safari and Chrome -->
<meta name="theme-color" content="#eeeeee" media="(prefers-color-scheme: dark)">
<meta name="theme-color" content="#111111" media="(prefers-color-scheme: light)">
</head>
<body>
<!-- ////////////// -->
<!-- Your HTML here -->
<!-- \\\\\\\\\\\\\\ -->
<!-- Optional Bootstrap JavaScript -->
<script src="location/of/the/bootstrap.js/here"></script>
</body>
</html>
That's all. The page will automatically transition to Dark Mode when the users sets their OS (or Firefox theme) to Dark Mode.
Please note: On browsers that support dark move (via the
prefers-color-scheme
media query) this variant produces exactly the some outcome, i.e. dark whenprefers-color-scheme
= dark and light whenprefers-color-scheme
= light. The only visible difference will be on browsers that do not supportprefers-color-scheme
. (However, those browsers may not work with BS5 at all ... see docs: Bootstrap 5 Browsers and devices)
Refer to the Bootstrap 5 Docs for more help.