Class: Squoosh::Squoosher

Inherits:
Object
  • Object
show all
Defined in:
lib/squoosh.rb

Overview

Minify HTML, JavaScript, and CSS using a single set of options. Minified versions of the JavaScript and CSS encountered are cached to speed up minification when the same scripts or inline style sheets appear multiple times.

Constant Summary collapse

DEFAULT_OPTIONS =

Default options for minifying.

  • ++remove_comments++ Remove all comments that aren't "loud"
  • ++omit_tags++ Omit unnecessary start and end tags
  • ++loud_comments++ Keep all comments matching this regex
  • ++minify_javascript++ Minify JavaScript

    Create a new instance of ++Squoosher++.

    Parameters:

    • (defaults to: {})

      options to override the default options

    

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    # File 'lib/squoosh.rb', line 68

def initialize(options = {})
  options.each_key do |key|
    unless DEFAULT_OPTIONS.include?(key)
      raise ArgumentError, "Invalid option `#{key}'"
    end
  end
  @options = DEFAULT_OPTIONS.merge(options)
  @js_cache = {}
  @inline_script_cache = {}
  @css_cache = {}
end

Instance Method Details

#minify_css(content) ⇒ String

Minify CSS using Sassc.

Parameters:

  • the CSS to minify

Returns:

  • the minified CSS



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# File 'lib/squoosh.rb', line 102

def minify_css(content)
  @css_cache[content] ||= begin
    root = SassC::Engine.new(content, @options[:sass_options])
    root.render.rstrip
  end
end

#minify_html(content) ⇒ String

Minify HTML and inline JavaScript and CSS.

If the ++content++ does not start with an HTML document type , then ++content++ is returned unchanged.

Parameters:

  • the HTML to minify

Returns:

  • the minified HTML



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# File 'lib/squoosh.rb', line 87

def minify_html(content)
  doc = Nokogiri.HTML5(content)
  return content unless doc.internal_subset&.html5_dtd?

  remove_comments(doc) if @options[:remove_comments]
  compress_javascript(doc) if @options[:minify_javascript]
  compress_css(doc) if @options[:minify_css]
  doc.children.each { |c| compress_spaces(c) } if @options[:compress_spaces]
  doc.children.map { |node| stringify_node(node) }.join
end

#minify_js(content) ⇒ String

Minify JavaScript using Uglify.

Parameters:

  • the JavaScript to minify

Returns:

  • the minified JavaScript



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# File 'lib/squoosh.rb', line 113

def minify_js(content)
  @js_cache[content] ||= uglify(content, @options[:uglifier_options])
end