CSS variables

Ny Bootstrap dia ahitana fananana CSS maro (variables) ao amin'ny CSS natambatra ho an'ny fanamboarana amin'ny fotoana tena izy nefa tsy mila mamerina ny Sass. Ireo dia manome fahafahana miditra mora amin'ny soatoavina fampiasa mahazatra toy ny loko loha-hevitray, ny teboka fahatapahana, ary ny antonta endri-tsoratra voalohany rehefa miasa ao amin'ny mpanara-maso ny mpitety tranonkalanao, ny boaty fasika kaody, na ny fanaovana prototype amin'ny ankapobeny.

Ny fananantsika manokana rehetra dia misy tombo-kasebs- mba hisorohana ny fifandirana amin'ny CSS antoko fahatelo.

Root variables

Ireto ny variables ampidirintsika (mariho fa :rootilaina) izay azo idirana na aiza na aiza misy ny CSS Bootstrap. Izy ireo dia hita ao amin'ny _root.scssrakitray ary tafiditra ao amin'ny rakitra dist natambatray.

:root {
  --bs-blue: #0d6efd;
  --bs-indigo: #6610f2;
  --bs-purple: #6f42c1;
  --bs-pink: #d63384;
  --bs-red: #dc3545;
  --bs-orange: #fd7e14;
  --bs-yellow: #ffc107;
  --bs-green: #198754;
  --bs-teal: #20c997;
  --bs-cyan: #0dcaf0;
  --bs-black: #000;
  --bs-white: #fff;
  --bs-gray: #6c757d;
  --bs-gray-dark: #343a40;
  --bs-gray-100: #f8f9fa;
  --bs-gray-200: #e9ecef;
  --bs-gray-300: #dee2e6;
  --bs-gray-400: #ced4da;
  --bs-gray-500: #adb5bd;
  --bs-gray-600: #6c757d;
  --bs-gray-700: #495057;
  --bs-gray-800: #343a40;
  --bs-gray-900: #212529;
  --bs-primary: #0d6efd;
  --bs-secondary: #6c757d;
  --bs-success: #198754;
  --bs-info: #0dcaf0;
  --bs-warning: #ffc107;
  --bs-danger: #dc3545;
  --bs-light: #f8f9fa;
  --bs-dark: #212529;
  --bs-primary-rgb: 13, 110, 253;
  --bs-secondary-rgb: 108, 117, 125;
  --bs-success-rgb: 25, 135, 84;
  --bs-info-rgb: 13, 202, 240;
  --bs-warning-rgb: 255, 193, 7;
  --bs-danger-rgb: 220, 53, 69;
  --bs-light-rgb: 248, 249, 250;
  --bs-dark-rgb: 33, 37, 41;
  --bs-white-rgb: 255, 255, 255;
  --bs-black-rgb: 0, 0, 0;
  --bs-body-color-rgb: 33, 37, 41;
  --bs-body-bg-rgb: 255, 255, 255;
  --bs-font-sans-serif: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", "Noto Sans", "Liberation Sans", Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";
  --bs-font-monospace: SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  --bs-gradient: linear-gradient(180deg, rgba(255, 255, 255, 0.15), rgba(255, 255, 255, 0));
  --bs-body-font-family: var(--bs-font-sans-serif);
  --bs-body-font-size: 1rem;
  --bs-body-font-weight: 400;
  --bs-body-line-height: 1.5;
  --bs-body-color: #212529;
  --bs-body-bg: #fff;
  --bs-border-width: 1px;
  --bs-border-style: solid;
  --bs-border-color: #dee2e6;
  --bs-border-color-translucent: rgba(0, 0, 0, 0.175);
  --bs-border-radius: 0.375rem;
  --bs-border-radius-sm: 0.25rem;
  --bs-border-radius-lg: 0.5rem;
  --bs-border-radius-xl: 1rem;
  --bs-border-radius-2xl: 2rem;
  --bs-border-radius-pill: 50rem;
  --bs-link-color: #0d6efd;
  --bs-link-hover-color: #0a58ca;
  --bs-code-color: #d63384;
  --bs-highlight-bg: #fff3cd;
}

Variable singa

Ny Bootstrap 5 dia mampiasa ny fananana manokana ho fari-piainana eo an-toerana ho an'ny singa isan-karazany. Amin'izany fomba izany dia mampihena ny CSS natambatray izahay, miantoka fa tsy lovaina amin'ny toerana toy ny latabatra misy akany ny fomba, ary mamela ny fanamboarana fototra sy fanitarana ny singa Bootstrap aorian'ny fanangonana Sass.

Have a look at our table documentation for some insight into how we’re using CSS variables. Our navbars also use CSS variables as of v5.2.0. We’re also using CSS variables across our grids—primarily for gutters the new opt-in CSS grid—with more component usage coming in the future.

Whenever possible, we’ll assign CSS variables at the base component level (e.g., .navbar for navbar and its sub-components). This reduces guessing on where and how to customize, and allows for easy modifications by our team in future updates.

Prefix

Most CSS variables use a prefix to avoid collisions with your own codebase. This prefix is in addition to the -- that’s required on every CSS variable.

Customize the prefix via the $prefix Sass variable. By default, it’s set to bs- (note the trailing dash).

Examples

CSS variables offer similar flexibility to Sass’s variables, but without the need for compilation before being served to the browser. For example, here we’re resetting our page’s font and link styles with CSS variables.

body {
  font: 1rem/1.5 var(--bs-font-sans-serif);
}
a {
  color: var(--bs-blue);
}

Grid breakpoints

While we include our grid breakpoints as CSS variables (except for xs), be aware that CSS variables do not work in media queries. This is by design in the CSS spec for variables, but may change in coming years with support for env() variables. Check out this Stack Overflow answer for some helpful links. In the meantime, you can use these variables in other CSS situations, as well as in your JavaScript.