module ActionView::Helpers::JavaScriptHelper

def button_to_function(name, function=nil, html_options={})


# =>
button_to_function "Greeting", "alert('Hello world!')", class: "ok"

If +html_options+ has an :onclick, that one is put before +function+.
name is used as button label and the JavaScript code goes into its +onclick+ attribute.
The helper receives a name, JavaScript code, and an optional hash of HTML options. The

Returns a button whose +onclick+ handler triggers the passed JavaScript. 
def button_to_function(name, function=nil, html_options={})
  message = "button_to_function is deprecated and will be removed from Rails 4.1. We recommend using Unobtrusive JavaScript instead. " +
    "See http://guides.rubyonrails.org/working_with_javascript_in_rails.html#unobtrusive-javascript"
  ActiveSupport::Deprecation.warn message
  onclick = "#{"#{html_options[:onclick]}; " if html_options[:onclick]}#{function};"
  tag(:input, html_options.merge(:type => 'button', :value => name, :onclick => onclick))
end

def escape_javascript(javascript)

$('some_element').replaceWith('<%=j render 'some/element_template' %>');

responses, like:
Also available through the alias j(). This is particularly helpful in JavaScript

Escapes carriage returns and single and double quotes for JavaScript segments. 
def escape_javascript(javascript)
  if javascript
    result = javascript.gsub(/(\\|<\/|\r\n|\342\200\250|\342\200\251|[\n\r"'])/u) {|match| JS_ESCAPE_MAP[match] }
    javascript.html_safe? ? result.html_safe : result
  else
    ''
  end
end

def javascript_cdata_section(content) #:nodoc:

:nodoc: 
def javascript_cdata_section(content) #:nodoc:
  "\n//#{cdata_section("\n#{content}\n//")}\n".html_safe
end

def javascript_tag(content_or_options_with_block = nil, html_options = {}, &block)

<% end -%>
alert('All is good')
<%= javascript_tag defer: 'defer' do -%>

in which case, you pass your +html_options+ as the first parameter.
Instead of passing the content as an argument, you can also use a block

# =>
javascript_tag "alert('All is good')", defer: 'defer'

tag.
+html_options+ may be a hash of attributes for the \
//]]>
alert('All is good')
//