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Quickly customize Bootstrap with built-in variables to easily toggle global CSS preferences for controlling style and behavior.

Customize Bootstrap with our built-in custom variables file and easily toggle global CSS preferences with new $enable-* Sass variables. Override a variable’s value and recompile with npm run test as needed.

You can find and customize these variables for key global options in Bootstrap’s scss/_variables.scss file.

Variable Values Description
$spacer 1rem (default), or any value > 0 Specifies the default spacer value to programmatically generate our spacer utilities.
$enable-rounded true (default) or false Enables predefined border-radius styles on various components.
$enable-shadows true or false (default) Enables predefined box-shadow styles on various components.
$enable-gradients true or false (default) Enables predefined gradients via background-image styles on various components.
$enable-transitions true (default) or false Enables predefined transitions on various components.
$enable-reduced-motion true (default) or false Enables the prefers-reduced-motion media query, which suppresses certain animations/transitions based on the users' browser/operating system preferences.
$enable-grid-classes true (default) or false Enables the generation of CSS classes for the grid system (e.g. .row, .col-md-1, etc.).
$enable-caret true (default) or false Enables pseudo element caret on .dropdown-toggle.
$enable-button-pointers true (default) or false Add “hand” cursor to non-disabled button elements.
$enable-rfs true (default) or false Globally enables RFS.
$enable-validation-icons true (default) or false Enables background-image icons within textual inputs and some custom forms for validation states.
$enable-negative-margins true or false (default) Enables the generation of negative margin utilities.
$enable-deprecation-messages true or false (default) Set to true to show warnings when using any of the deprecated mixins and functions that are planned to be removed in v5.
$enable-important-utilities true (default) or false Enables the !important suffix in utility classes.