postcss-each-in-map

PostCSS plugin to iterate through maps.

Iterate through a map:

.u-display {
  @each-in-map $display-name, $display-type in display_types {
    &$(display-name) {
      display: $display-type;
    }
  }
}

.u-display {
  @each $display-name, $display-type in (None, InlineBlock, InlineFlex, Block, Flex, Grid), (none, inline-block, inline-flex, block, flex, grid) {
    &$(display-name) {
      display: $display-type;
    }
  }
}

Iterate through a map with multiple (and missing) values:

@each $space, $space-index in 0, 5px, 10px, 15px, 30px, 45px, 60px {
  @each-in-map $direction, $direction-attribute in direction_map {
    $(direction)$(space-index) {
      $(direction-attribute): $space !important;
    }
  }
}

@each $space, $space-index in 0, 5px, 10px, 15px, 30px, 45px, 60px {
  @each $direction, $direction-attribute in (X, X, Y, Y, A, T, B, L, R), (-left, -right, -top, -bottom, , -top, -bottom, -left, -right) {
    $(direction)$(space-index) {
      $(direction-attribute): $space !important;
    }
  }
}

Iterate through a map while destructuring array values:

@each-in-map $class, $background, $label_width in graph_parts {
  $(class) {
    .metrics-graph-part-number:before {
      background: $background;
    }

    .metrics-graph-part-number,
    .metrics-graph-part-label {
      width: $label_width;
    }
  }
}

@each $class, $background, $label_width in (opt-outs, clicks, opens, bounces, unactioned), ($mango_tango, var(--color-a11y-blue), $funk, $agrellan_badland, $hint_of_mauve_pansy), (52px, 36px, 35px, 49px, auto) {
  $(class) {
    .metrics-graph-part-number:before {
      background: $background;
    }

    .metrics-graph-part-number,
    .metrics-graph-part-label {
      width: $label_width;
    }
  }
}

Example json:

{
  "display_types": {
    "None": "none",
    "InlineBlock": "inline-block",
    "InlineFlex": "inline-flex",
    "Block": "block",
    "Flex": "flex",
    "Grid": "grid"
  },
  "direction_map": {
    "X": [
      "-left",
      "-right"
    ],
    "Y": [
      "-top",
      "-bottom"
    ],
    "A": "",
    "T": "-top",
    "B": "-bottom",
    "L": "-left",
    "R": "-right"
  },
  "graph_parts": {
    "opt-outs": [
      "$mango_tango",
      "52px",
      "top"
    ],
    "clicks": [
      "var(--color-a11y-blue)",
      "36px",
      "bottom"
    ],
    "opens": [
      "$funk",
      "35px",
      "top"
    ],
    "bounces": [
      "$agrellan_badland",
      "49px",
      "bottom"
    ],
    "unactioned": [
      "$hint_of_mauve_pansy",
      "auto",
      "bottom"
    ]
  }
}

Usage

Step 1: Install plugin:

npm install --save-dev postcss postcss-each-in-map postcss-each

Step 2: Add the plugin to the plugins list:

module.exports = {
  plugins: [
+   require('postcss-each-in-map'),
+   require('postcss-each'),
    require('autoprefixer')
  ]
}

Options

require('postcss-each-in-map')({
  basePath: 'app/assets/json',
  jsonPath: 'maps.json',
  logLevel: 'info',
})

basePath

Type: String Default: process.cwd()

Location to look for map json. Can be either relative or absolute.

jsonPath

Type: String Default: 'maps.json'

Name (or path) relative to the basePath to find the map json file.

logLevel

Type: String Default: 'warn'

Log level (from https://github.com/pimterry/loglevel) for this plugin.