class Sprockets::CharsetNormalizer - sprockets-2.11.3 Documentation

# class Sprockets::CharsetNormalizer

Some browsers have issues with stylesheets that contain multiple `@charset` definitions. The issue surfaces while using Sass since it inserts a `@charset` at the top of each file. Then Sprockets concatenates them together.

The `CharsetNormalizer` processor strips out multiple `@charset` definitions.

The current implementation is naive. It picks the first `@charset` it sees and strips the others. This works for most people because the other definitions are usually `UTF-8`. A more sophisticated approach would be to re-encode stylesheets with mixed encodings.

This behavior can be disabled with:

    environment.unregister_bundle_processor 'text/css', Sprockets::CharsetNormalizer

### Public Instance Methods

evaluate(context, locals, &block) click to toggle source

    # File lib/sprockets/charset_normalizer.rb, line 25
    def evaluate(context, locals, &block)
      charset = nil

      # Find and strip out any `@charset` definitions
      filtered_data = data.gsub(/^@charset "([^"]+)";$/) {
        charset ||= $1; ""
      }

      if charset
        # If there was a charset, move it to the top
        "@charset \"#{charset}\";#{filtered_data}"
      else
        data
      end
    end

prepare() click to toggle source

    # File lib/sprockets/charset_normalizer.rb, line 22
    def prepare
    end