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42 lines
2.8 KiB
Markdown
42 lines
2.8 KiB
Markdown
---
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layout: docs
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title: Customization options
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description: Customize Bootstrap with Sass variables, easily toggling global preferences with a quick recompile.
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group: getting-started
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---
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Customize Bootstrap 4 with our built-in custom variables file and easily toggle global CSS preferences with new `$enable-*` Sass variables. Override a variable's value and recompile with `npm run test` as needed.
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## Customizing variables
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Bootstrap 4 ships with a `_custom.scss` file for easy overriding of default variables in `/scss/_variables.scss`. Copy and paste relevant lines from there into the `_custom.scss` file, modify the values, and recompile your Sass to change our default values. **Be sure to remove the `!default` flag from override values.**
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For example, to change out the `background-color` and `color` for the `<body>`, you'd do the following:
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{% highlight scss %}
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// Bootstrap overrides
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//
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// Copy variables from `_variables.scss` to this file to override default values
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// without modifying source files.
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$body-bg: $gray-dark;
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$body-color: $gray-light;
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{% endhighlight %}
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Do the same for any variable you need to override, including the global options listed below.
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## Global options
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You can find and customize these variables for key global options in our `_variables.scss` file.
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| Variable | Values | Description |
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| --------------------------- | ---------------------------------- | -------------------------------------------------------------------------------------- |
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| `$spacer` | `1rem` (default), or any value > 0 | Specifies the default spacer value to programmatically generate our [spacer utilities](/utilities/spacing/). |
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| `$enable-rounded` | `true` (default) or `false` | Enables predefined `border-radius` styles on various components. |
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| `$enable-shadows` | `true` or `false` (default) | Enables predefined `box-shadow` styles on various components. |
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| `$enable-gradients` | `true` or `false` (default) | Enables predefined gradients via `background-image` styles on various components. |
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| `$enable-transitions` | `true` (default) or `false` | Enables predefined `transition`s on various components. |
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| `$enable-hover-media-query` | `true` or `false` (default) | ... |
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| `$enable-grid-classes` | `true` (default) or `false` | Enables the generation of CSS classes for the grid system (e.g., `.container`, `.row`, `.col-md-1`, etc.). |
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| `$enable-print-styles` | `true` (default) or `false` | Enables styles for optimizing printing. |
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