Module | ActionView::Helpers::JavaScriptHelper |
In: |
lib/action_view/helpers/javascript_helper.rb
|
JS_ESCAPE_MAP | = | { '\\' => '\\\\', '</' => '<\/', "\r\n" => '\n', "\n" => '\n', "\r" => '\n', '"' => '\\"', "'" => "\\'" } |
Returns a button whose onclick handler triggers the passed JavaScript.
The helper receives a name, JavaScript code, and an optional hash of HTML options. The name is used as button label and the JavaScript code goes into its onclick attribute. If html_options has an :onclick, that one is put before function.
button_to_function "Greeting", "alert('Hello world!')", :class => "ok" # => <input class="ok" onclick="alert('Hello world!');" type="button" value="Greeting" />
Escape carrier returns and single and double quotes for JavaScript segments. Also available through the alias j(). This is particularly helpful in JavaScript responses, like:
$('some_element').replaceWith('<%=j render 'some/element_template' %>');
Returns a JavaScript tag with the content inside. Example:
javascript_tag "alert('All is good')"
Returns:
<script type="text/javascript"> //<![CDATA[ alert('All is good') //]]> </script>
html_options may be a hash of attributes for the <script> tag. Example:
javascript_tag "alert('All is good')", :defer => 'defer' # => <script defer="defer" type="text/javascript">alert('All is good')</script>
Instead of passing the content as an argument, you can also use a block in which case, you pass your html_options as the first parameter.
<%= javascript_tag :defer => 'defer' do -%> alert('All is good') <% end -%>
Returns a link whose onclick handler triggers the passed JavaScript.
The helper receives a name, JavaScript code, and an optional hash of HTML options. The name is used as the link text and the JavaScript code goes into the onclick attribute. If html_options has an :onclick, that one is put before function. Once all the JavaScript is set, the helper appends "; return false;".
The href attribute of the tag is set to "#" unless html_options has one.
link_to_function "Greeting", "alert('Hello world!')", :class => "nav_link" # => <a class="nav_link" href="#" onclick="alert('Hello world!'); return false;">Greeting</a>