sass-module-config

This Sass module is for defining immutable configuration singletons.

Install

Install the package:

npm install sass-module-config

Use the package like any other Sass module:

@use 'sass-module-config';

Depending on your setup, you may need to use the module by its full path:

// This is only an example
@use '../node_modules/sass-module-config';

One Setting

$config (Map), defaults to an empty map.

• A map which is expected to be configured when using the module.
• The map many contain values of any type, including other maps.
• There is no limit to the depth of this map.

Usage

The following example will define a private variable for the configuration. The variable is then used to configure the $config variable of the sass-module-config module. The $config variable is also hidden to ensure only the sass-module-config's functions are used to get configuration values.

// config.scss
$-config: (
  header: (
    width: 100%,
    height: 200px
  ),
  color: (
    text: #ddd,
    background: (
      &: #222,
      light: #fff
    )
  )
);

@forward 'sass-module-config'
  hide $config
  with ($config: $-config);

// main.scss
@use 'config';

body {
  color: config.get('color' 'text');
  background: config.get('color' 'background');
  header {
    width: config.get('header' 'width');
    height: config.get('header' 'height');
    background: config.get('color' 'background' 'light');
  }
}

Notice: The ampersand (&) indicates the default value for the map on which it is defined. The use of ampersand is no different than using null as the map key.

Public API

@function get($names)

Gets a configured value by the specified names.

@param {String | List} $names - A list of configuration names that indicate the value to be selected. @return {*} - The configured value. @throw - The configuration for `get(#{$names})` has not been defined.

Helpers

Two helpers have been provided to improve type checking and organisation of color and size values. These may be accessed at the sass-module-config/helpers namespace.

@function color($names)

Gets a configured color or color map by the specified names.

@param {String | List} $names - A list of configuration names that indicate the color to be selected. @return {Color | Map} - The configured color. @throw - The configuration for `color(#{$names})` has not been defined. @throw - No color or color map was found for `color(#{$names})`.

@function size($names)

Gets a configured size or size map by the specified names.

@param {String | List} $names - A list of configuration names that indicate the size to be selected. @return {Number | Map} - The configured size. @throw - The configuration for `size(#{$names})` has not been defined. @throw - No size or size map was found for `size(#{$names})`.

Example with Helpers

// config.scss
$-config: (
  size: (
    header: (
      width: 100%,
      height: 200px
    )
  ),
  color: (
    text: #ddd,
    background: (
      &: #222,
      light: #fff
    )
  )
);

@forward 'sass-module-config'
  hide $config
  with ($config: $-config);

@forward 'sass-module-config/helpers'

// main.scss
@use 'config';

body {
  color: config.color('text');
  background: config.color('background');
  header {
    width: config.size('header' 'width');
    height: config.size('header' 'height');
    background: config.color('background' 'light');
  }
}