module Sass::Features
Provides `Sass.has_feature?` which allows for simple feature detection by providing a feature name.
Constants
- KNOWN_FEATURES
This is the set of features that can be detected.
When this is updated, the documentation of `feature-exists()` should be updated as well.
Public Instance Methods
add_feature(feature_name)
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Add a feature to Sass. Plugins can use this to easily expose their availability to end users. Plugins must prefix their feature names with a dash to distinguish them from official features.
@example
Sass.add_feature("-import-globbing") Sass.add_feature("-math-cos")
@param feature_name [String] The case sensitive name of the feature to
to add to Sass. Must begin with a dash.
# File lib/sass/features.rb, line 38 def add_feature(feature_name) unless feature_name[0] == ?- raise ArgumentError.new("Plugin feature names must begin with a dash") end KNOWN_FEATURES << feature_name end
has_feature?(feature_name)
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Check if a feature exists by name. This is used to implement the Sass function `feature-exists($feature)`
@param feature_name [String] The case sensitive name of the feature to
check if it exists in this version of Sass.
@return [Boolean] whether the feature of that name exists.
# File lib/sass/features.rb, line 23 def has_feature?(feature_name) KNOWN_FEATURES.include?(feature_name) end