Class: Uglifier
- Inherits:
-
Object
- Object
- Uglifier
- Defined in:
- lib/uglifier.rb,
lib/uglifier/version.rb
Overview
A wrapper around the UglifyJS interface
Constant Summary collapse
- Error =
Error class for compilation errors.
ExecJS::Error
- SourcePath =
UglifyJS source path
File.("../uglify.js", __FILE__)
- ES5FallbackPath =
ES5 shims source path
File.("../es5.js", __FILE__)
- SplitFallbackPath =
String.split shim source path
File.("../split.js", __FILE__)
- UglifyJSWrapperPath =
UglifyJS wrapper path
File.("../uglifier.js", __FILE__)
- DEFAULTS =
Default options for compilation
{ # rubocop:disable LineLength :output => { :ascii_only => true, # Escape non-ASCII characterss :comments => :copyright, # Preserve comments (:all, :jsdoc, :copyright, :none) :inline_script => false, # Escape occurrences of </script in strings :quote_keys => false, # Quote keys in object literals :max_line_len => 32 * 1024, # Maximum line length in minified code :bracketize => false, # Bracketize if, for, do, while or with statements, even if their body is a single statement :semicolons => true, # Separate statements with semicolons :preserve_line => false, # Preserve line numbers in outputs :beautify => false, # Beautify output :indent_level => 4, # Indent level in spaces :indent_start => 0, # Starting indent level :space_colon => false, # Insert space before colons (only with beautifier) :width => 80, # Specify line width when beautifier is used (only with beautifier) :preamble => nil # Preamble for the generated JS file. Can be used to insert any code or comment. }, :mangle => { :eval => false, # Mangle names when eval of when is used in scope :except => ["$super"], # Argument names to be excluded from mangling :sort => false, # Assign shorter names to most frequently used variables. Often results in bigger output after gzip. :toplevel => false, # Mangle names declared in the toplevel scope :properties => false # Mangle property names }, # Mangle variable and function names, set to false to skip mangling :mangle_properties => false, # Mangle property names :compress => { :sequences => true, # Allow statements to be joined by commas :properties => true, # Rewrite property access using the dot notation :dead_code => true, # Remove unreachable code :drop_debugger => true, # Remove debugger; statements :unsafe => false, # Apply "unsafe" transformations :conditionals => true, # Optimize for if-s and conditional expressions :comparisons => true, # Apply binary node optimizations for comparisons :evaluate => true, # Attempt to evaluate constant expressions :booleans => true, # Various optimizations to boolean contexts :loops => true, # Optimize loops when condition can be statically determined :unused => true, # Drop unreferenced functions and variables :hoist_funs => true, # Hoist function declarations :hoist_vars => false, # Hoist var declarations :if_return => true, # Optimizations for if/return and if/continue :join_vars => true, # Join consecutive var statements :cascade => true, # Cascade sequences :collapse_vars => false, # Collapse single-use var and const definitions when possible. :negate_iife => true, # Negate immediately invoked function expressions to avoid extra parens :pure_getters => false, # Assume that object property access does not have any side-effects :pure_funcs => nil, # List of functions without side-effects. Can safely discard function calls when the result value is not used :drop_console => false, # Drop calls to console.* functions :angular => false, # Process @ngInject annotations :keep_fargs => false, # Preserve unused function arguments :keep_fnames => false # Preserve function names }, # Apply transformations to code, set to false to skip :define => {}, # Define values for symbol replacement :enclose => false, # Enclose in output function wrapper, define replacements as key-value pairs :screw_ie8 => false, # Don't bother to generate safe code for IE8 :source_map => false # Generate source map }
- LEGACY_OPTIONS =
[:comments, :squeeze, :copyright, :mangle]
- MANGLE_PROPERTIES_DEFAULTS =
{ :regex => nil # A regular expression to filter property names to be mangled }
- SOURCE_MAP_DEFAULTS =
{ :map_url => false, # Url for source mapping to be appended in minified source :url => false, # Url for original source to be appended in minified source :sources_content => false, # Include original source content in map :filename => nil, # The filename of the input file :root => nil, # The URL of the directory which contains :filename :output_filename => nil, # The filename or URL where the minified output can be found :input_source_map => nil # The contents of the source map describing the input }
- VERSION =
Current version of Uglifier.
"3.0.0"
Class Method Summary collapse
-
.compile(source, options = {}) ⇒ String
Minifies JavaScript code using implicit context.
-
.compile_with_map(source, options = {}) ⇒ Array(String, String)
Minifies JavaScript code and generates a source map using implicit context.
Instance Method Summary collapse
-
#compile(source) ⇒ String
(also: #compress)
Minifies JavaScript code.
-
#compile_with_map(source) ⇒ Array(String, String)
Minifies JavaScript code and generates a source map.
-
#initialize(options = {}) ⇒ Uglifier
constructor
Initialize new context for Uglifier with given options.
Constructor Details
#initialize(options = {}) ⇒ Uglifier
Initialize new context for Uglifier with given options
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# File 'lib/uglifier.rb', line 120 def initialize( = {}) (.keys - DEFAULTS.keys - LEGACY_OPTIONS)[0..1].each do |missing| raise ArgumentError, "Invalid option: #{missing}" end @options = @context = ExecJS.compile(uglifyjs_source) end |
Class Method Details
.compile(source, options = {}) ⇒ String
Minifies JavaScript code using implicit context.
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# File 'lib/uglifier.rb', line 104 def self.compile(source, = {}) new().compile(source) end |
.compile_with_map(source, options = {}) ⇒ Array(String, String)
Minifies JavaScript code and generates a source map using implicit context.
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# File 'lib/uglifier.rb', line 113 def self.compile_with_map(source, = {}) new().compile_with_map(source) end |
Instance Method Details
#compile(source) ⇒ String Also known as: compress
Minifies JavaScript code
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# File 'lib/uglifier.rb', line 132 def compile(source) if @options[:source_map] compiled, source_map = run_uglifyjs(source, true) source_map_uri = Base64.strict_encode64(source_map) source_map_mime = "application/json;charset=utf-8;base64" compiled + "\n//# sourceMappingURL=data:#{source_map_mime},#{source_map_uri}" else run_uglifyjs(source, false) end end |
#compile_with_map(source) ⇒ Array(String, String)
Minifies JavaScript code and generates a source map
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# File 'lib/uglifier.rb', line 148 def compile_with_map(source) run_uglifyjs(source, true) end |