SCSS/SASS @ HEX和RGB格式的每个循环调色板

Question

如何通过使用@each循环显示带有HEX和RGB格式的调色板

调色板变量:

$colors: (
  "transparent": transparent,
  "current": currentColor,
  "white": (
    hex: #FFFFFF,
    rgb: (255, 255, 255)
  ),
  "black": (
    hex: #000000,
    rgb: (0, 0, 0)
  )
) !default;

编译为CSS :后所期望的结果

.color-transparent {
  color: transparent;
}

.color-current {
  color: currentColor;
}

.color-white {
  --color-opacity: 1;
  color: #FFFFFF;
  color: rgba(255, 255, 255, var(--color-opacity));
}

.color-black {
  --color-opacity: 1;
  color: #000000;
  color: rgba(0, 0, 0, var(--color-opacity));
}

Answer 1

下面是如何使用@each和地图实现的。

$colors: (
  "transparent": transparent,
  "current": currentColor,
  "white": (
    hex: #FFFFFF,
    rgba: (255, 255, 255, var(--color-opacity))
  ),
  "black": (
    hex: #000000,
    rgba: (0, 0, 0, var(--color-opacity))
  )
) !default;

// $COLOR = KEY, $VALUE = VALUE, $COLORS = MAP
@each $color, $value in $colors {
    // SINGLE VALUE
    @if $color == "transparent" {
       .color-#{$color} {
           color: #{$value};
       }
    } @else if $color == "current" {
        .color-#{$color} {
            color: $value;
        }
    // SUBMAP - SINCE $VALUE IS ANOTHER MAP HERE.   
    } @else {
        // SET THE COLOR NAME
        .color-#{$color} {
        // SET YOUR COLOR OPACITY    
        --color-opacity: 1;
        // LOOP THROUGH THE TWO COLORS IN THE SUBMAP
        @each $color_name, $value_c in $value {
            @if $color_name == hex {
                color: $value_c;
            } @else {
                color: rbga( $value_c );
               }
            }
        }
    }
}

CSS输出

.color-transparent {
  color: transparent;
}

.color-current {
  color: currentColor;
}

.color-white {
  --color-opacity: 1;
  color: #FFFFFF;
  color: rbga(255, 255, 255, var(--color-opacity));
}

.color-black {
  --color-opacity: 1;
  color: #000000;
  color: rbga(0, 0, 0, var(--color-opacity));
}

编辑RGBA()函数

要解决rgba()抛出通道错误时的问题，可以在hex部分之后删除@else，并将十六进制值传递给rgba()函数。这将将十六进制转换为rgb值。

$colors: (
  "transparent": transparent,
  "current": currentColor,
  "white": (
    hex: #FFFFFF,
    rgba: (255, 255, 255, var(--color-opacity))
  ),
  "black": (
    hex: #000000,
    rgba: (0, 0, 0, var(--color-opacity))
  )
) !default;

// $COLOR = KEY, $VALUE = VALUE, $COLORS = MAP
@each $color, $value in $colors {
    // SINGLE VALUE
    @if $color == "transparent" {
       .color-#{$color} {
           color: #{$value};
       }
    } @else if $color == "current" {
        .color-#{$color} {
            color: $value;
        }
    // SUBMAP - SINCE $VALUE IS ANOTHER MAP HERE.   
    } @else {
        // SET THE COLOR NAME
        .color-#{$color} {
            // SET YOUR COLOR OPACITY    
            --color-opacity: 1;
            // LOOP THROUGH THE TWO COLORS IN THE SUBMAP
            @each $color_name, $value_c in $value {
                // WE ONLY WANT TO USE HEX, BECAUSE RGBA() IS A NATIVE FUNCTION
                @if $color_name == hex {
                color: $value_c;
                color: rgba( $value_c, var(--color-opacity));
                } 
            }
        }
    }
}