+++ /dev/null
-@charset "UTF-8";
-
-/// Switches between two colors based on the contrast to another color. It’s
-/// like a [ternary operator] for color contrast and can be useful for building
-/// a button system.
-///
-/// The calculation of the contrast ratio is based on the [WCAG 2.0
-/// specification]. However, we cannot guarantee full compliance, though all of
-/// our manual testing passed.
-///
-/// [ternary operator]: https://goo.gl/ccfLqi
-/// [WCAG 2.0 specification]: https://goo.gl/zhQuYA
-///
-/// @argument {color} $base-color
-/// The color to evaluate lightness against.
-///
-/// @argument {color} $dark-color [#000]
-/// The color to be output when `$base-color` is light. Can also be set
-/// globally using the `contrast-switch-dark-color` key in the
-/// Bourbon settings.
-///
-/// @argument {color} $light-color [#fff]
-/// The color to be output when `$base-color` is dark. Can also be set
-/// globally using the `contrast-switch-light-color` key in the
-/// Bourbon settings.
-///
-/// @return {color}
-///
-/// @example scss
-/// .element {
-/// color: contrast-switch(#bae6e6);
-/// }
-///
-/// // CSS Output
-/// .element {
-/// color: #000;
-/// }
-///
-/// @example scss
-/// .element {
-/// $button-color: #2d72d9;
-/// background-color: $button-color;
-/// color: contrast-switch($button-color, #222, #eee);
-/// }
-///
-/// // CSS Output
-/// .element {
-/// background-color: #2d72d9;
-/// color: #eee;
-/// }
-///
-/// @require {function} _fetch-bourbon-setting
-///
-/// @require {function} _is-color
-///
-/// @require {function} _contrast-ratio
-///
-/// @since 5.0.0
-
-@function contrast-switch(
- $base-color,
- $dark-color: _fetch-bourbon-setting("contrast-switch-dark-color"),
- $light-color: _fetch-bourbon-setting("contrast-switch-light-color")
-) {
- @if not _is-color($base-color) {
- @error "`#{$base-color}` is not a valid color for the `$base-color` " +
- "argument in the `contrast-switch` function.";
- } @else if not _is-color($dark-color) {
- @error "`#{$dark-color}` is not a valid color for the `$dark-color` " +
- "argument in the `contrast-switch` function.";
- } @else if not _is-color($light-color) {
- @error "`#{$light-color}` is not a valid color for the `$light-color` " +
- "argument in the `contrast-switch` function.";
- } @else {
- $-contrast-to-dark: _contrast-ratio($base-color, $dark-color);
- $-contrast-to-light: _contrast-ratio($base-color, $light-color);
- $-prefer-dark: $-contrast-to-dark >= $-contrast-to-light;
-
- @return if($-prefer-dark, $dark-color, $light-color);
- }
-}