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Comment by aaronbrethorst | Hacker News Reader

Combining Haml with jQuery Mobile makes it pretty much mandatory:

    #main_page{:"data-role" => 'page'}

Haml keys can be plain strings.

    #main_page{"data-role" => 'page'}

`data-` attributes are also special-cased:

    #main_page{data: {role: 'page'}}

I did not know that. Thanks for the heads up, and thanks for Haml and Sass!

You can also use "HTML-style attributes" [1]

    #main_page(data-role='page')