HTML5 Custom Data Attributes

  1. HTML5 allows for adding custom non-visible data attributes to elements using attribute names beginning with data-.
  2. Custom data attributes can be used in Haml by using the key :data with a Hash value in an attribute hash.
  3. Each of the key/value pairs in the Hash will be transformed into a custom data attribute.
  4. For example:
    %a{:href=>"/posts", :data => {:author_id => 123}} Posts By Author
    
    will render as:

    <a data-author-id='123' href='/posts'>Posts By Author</a>
    
  5. Notice that the underscore in author_id was replaced by a hyphen.
  6. If you wish to suppress this behavior, you can set Haml’s :hyphenate_data_attrs option to false, and the output will be rendered as:

    <a data-author_id='123' href='/posts'>Posts By Author</a>
    

Casiano Rodriguez León 2015-06-18