Module: EJS

Defined in:
lib/ejs.rb

Constant Summary collapse

DEFAULTS = 
{
  open_tag: '<%',
  close_tag: '%>',
  
  open_tag_modifiers: {
    escape: '=',
    unescape: '-',
    comment: '#',
    literal: '%'
  },

  close_tag_modifiers: {
    trim: '-',
    literal: '%'
  },
  
  escape: nil
}
ASSET_DIR = 
File.join(__dir__, 'ruby', 'ejs', 'assets')

Class Method Summary collapse

Class Method Details

.compile(source, options = {}) ⇒ Object 



52
53
54
55
56
57
58
59
 
# File 'lib/ejs.rb', line 52

def compile(source, options = {})
  options = default(options)
  
  output = "function(locals, escape) {\n"
  output << function_source(source, options)
  output << "}"
  output
end

.evaluate(template, locals = {}, options = {}) ⇒ Object

Evaluates an EJS template with the given local variables and compiler options. You will need the ExecJS (github.com/sstephenson/execjs/) library and a JavaScript runtime available.

EJS.evaluate("Hello <%= name %>", name: "world")
# => "Hello world"



70
71
72
73
74
75
76
77
78
79
80
81
 
# File 'lib/ejs.rb', line 70

def evaluate(template, locals = {}, options = {})
  require "execjs"
  context = ExecJS.compile("    \#{escape_function}\n    \n    var template = \#{compile(template, options)}\n    var evaluate = function(locals) {\n      return template(locals, escape);\n    }\n  JS\n  context.call(\"evaluate\", locals)\nend\n")

.transform(source, options = {}) ⇒ Object

Compiles an EJS template to a JavaScript function. The compiled function takes an optional argument, an object specifying local variables in the template. You can optionally pass the ‘:evaluation_pattern` and `:interpolation_pattern` options to `compile` if you want to specify a different tag syntax for the template.

EJS.compile("Hello <%= name %>")
# => "function(obj){...}"



36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
 
# File 'lib/ejs.rb', line 36

def transform(source, options = {})
  options = default(options)
  
  output = if options[:escape]
    "import {" + options[:escape].split('.').reverse.join(" as escape} from '") + "';\n"
  else
    "import {escape} from 'ejs';\n"
  end
  
  output << "export default function (locals) {\n"
  output << function_source(source, options)
  output << "}"

  output
end