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Haml: Prefixing a group of attributes
Haml lets you prefix a group of attributes by wrapping them in a hash. This is only possible with the {} attribute syntax, not with the () attribute syntax.
Example: HTML5 data attributes
HTML5 allows you to use arbitrary attributes like data-method and data-confirm. You can prefix a group of data- attributes like this:
Copy%a{href: '/path', data: { method: 'delete', confirm: 'Really delete?' }} Label
This compiles to:
Copy<a data-confirm='Really delete?' data-method='delete' href='/path'>Label</a>
Example: Unpoly attributes
You might also want to use this to define multiple Unpoly attributes, which are all prefixed by up-:
Copy%a{href: '/path', up: { target: '.element', transition: 'zoom-in' }} Label
This compiles to:
Copy<a href='/path' up-target='.element' up-transition='zoom-in'>Label</a>
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