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116 lines
5.4 KiB
Markdown
116 lines
5.4 KiB
Markdown
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---
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layout: docs
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title: Customization options
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description: Customize Bootstrap 4 with our new built-in Sass variables for global style preferences for easy theming and component changes.
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group: getting-started
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toc: true
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---
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## Customizing variables
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Every Sass variable in Bootstrap 4 includes the `!default` flag, meaning you can override that default value in your own Sass even after that original variable's been defined. Copy and paste variables as needed, modify the values, remove the `!default` flag, and recompile.
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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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$body-bg: $gray-900;
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$body-color: $gray-600;
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{% endhighlight %}
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Do the same for any variable you need to override, including the global options listed below.
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## Global options
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Customize Bootstrap 4 with our built-in custom variables file and easily toggle global CSS preferences with new `$enable-*` Sass variables. Override a variable's value and recompile with `npm run test` as needed.
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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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## Color
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Many of Bootstrap's various components and utilities are built through a series of colors defined in a Sass map. This map can be looped over in Sass to quickly generate a series of rulesets.
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### All colors
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All colors available in Bootstrap 4, available as Sass variables and a Sass map in our `scss/_variables.scss` file. This will be expanded upon in subsequent minor releases to add additional shades, much like the [grayscale palette](#grays) we already include.
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<div class="row">
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{% for color in site.data.colors %}
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<div class="col-md-4">
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{% unless color.name == "white" or color.name == "gray" or color.name == "gray-dark" %}
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<div class="p-3 mb-3 swatch-{{ color.name }}">{{ color.name | capitalize }}</div>
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{% endunless %}
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</div>
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{% endfor %}
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</div>
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Here's how you can use these in your Sass:
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{% highlight scss %}
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// With variable
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.alpha { color: $purple; }
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// From the Sass map with our `color()` function
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.beta { color: color("purple"); }
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{% endhighlight %}
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[Color utility classes]({{ site.baseurl }}/docs/{{ site.docs_version }}/utilities/colors/) are also available for setting `color` and `background-color`.
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{% callout info %}
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In the future, we'll aim to provide Sass maps and variables for shades of each color as we've done with the grayscale colors below.
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{% endcallout %}
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### Theme colors
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We use a subset of all colors to create a smaller color palette for generating color schemes, also available as Sass variables and a Sass map in our `scss/_variables.scss` file.
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<div class="row">
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{% for color in site.data.theme-colors %}
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<div class="col-md-4">
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<div class="p-3 mb-3 swatch-{{ color.name }}">{{ color.name | capitalize }}</div>
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</div>
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{% endfor %}
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</div>
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### Grays
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An expansive set of gray variables and a Sass map in `scss/_variables.scss` for consistent shades of gray across your project.
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<div class="row mb-3">
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<div class="col-md-4">
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{% for color in site.data.grays %}
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<div class="p-3 swatch-{{ color.name }}">{{ color.name | capitalize }}</div>
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{% endfor %}
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</div>
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</div>
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Within `_variables.scss`, you'll find our color variables and Sass map. Here's an example of the `$colors` Sass map:
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{% highlight scss %}
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$colors: (
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red: $red,
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orange: $orange,
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yellow: $yellow,
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green: $green,
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teal: $teal,
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blue: $blue,
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pink: $pink,
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purple: $purple,
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white: $white,
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gray: $gray-600,
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gray-dark: $gray-900
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) !default;
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{% endhighlight %}
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Add, remove, or modify values within the map to update how they're used in many other components. Unfortunately at this time, not _every_ component utilizes this Sass map. Future updates will strive to improve upon this. Until then, plan on making use of the `${color}` variables and this Sass map.
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