Posted over 5 years ago. Visible to the public.

HAML 4+ expands nested element attributes

As you may know, HAML expands data attributes Archive that are given as a hash:

%div{ data: { count: 3 } } # results in: <div data-count="3"></div>

However, this also works for any other hash attribute. Consider an Angular directive or an Unpoly Archive compiler that is configured by several attributes. Usually you'd prefix them with the directive/compiler name so it gets clear where the attribute belongs. With HAML, this is easy to build:

%div{ lightbox: true, lightbox: { slide_count: 3, url: '...', cycle: true } } # results in: <div lightbox lightbox-slide-count="3" lightbox-url="..." lightbox-cycle="true"></div>


Flaky tests are tests that sometimes fail for no obvious reason. They are the plague of many end-to-end (E2E) test suites that automate the browser through tools like Capybara and Selenium.

Join our free training event and learn to fix any flaky test suite, even in large legacy applications.

Owner of this card:

Dominik Schöler
Last edit:
over 5 years ago
by Martin Straub
About this deck:
We are makandra and do test-driven, agile Ruby on Rails software development.
License for source code
Posted by Dominik Schöler to makandra dev
This website uses short-lived cookies to improve usability.
Accept or learn more