Module AssetHat::JS::Engines

  1. lib/asset_hat/js.rb

Swappable JavaScript minification engines.

Methods

public class

  1. jsmin
  2. weak

Public class methods

jsmin (input_string)

JavaScript minification engine that simply uses the JSMin gem, a Ruby port of Crockford’s JSMin.

Sources:

[show source] 
    # File lib/asset_hat/js.rb, line 79
79:       def self.jsmin(input_string)
80:         JSMin.minify(input_string)
81:       end
weak (input_string)

Barebones JavaScript minification engine that:

  • Skips leading/trailing whitespace for each line, excluding line breaks; and
  • Removes one-line comments that had no actual code on that line.
[show source] 
    # File lib/asset_hat/js.rb, line 48
48:       def self.weak(input_string)
49:         input   = StringIO.new(input_string)
50:         output  = StringIO.new
51: 
52:         input.each do |line|
53:           # Remove indentation and trailing whitespace
54:           line.strip!
55:           next if line.blank?
56: 
57:           # Skip single-line comments
58:           next if !(line =~ /^\/\//).nil?
59:           # TODO: Also skip single-line comments that began mid-line, but not
60:           #       inside a string or regex
61: 
62:           # TODO: Skip multi-line comments
63:           # - Should not strip from within a string or regex
64:           # - Should not strip comments that begin with `/*!` (e.g., licenses)
65: 
66:           output.write(line + "\n")
67:         end
68: 
69:         output.rewind
70:         output.read
71:       end