HAML

HAML is the Ruby on Rails template language that GitLab uses.

GitLab UI form builder

GitLab UI is a Vue component library that conforms to the Pajamas design system. Most of these components rely on JavaScript and therefore can only be used in Vue.

However, some of the simpler components (checkboxes, radio buttons, form inputs) can be used in HAML by applying the correct CSS classes to the elements. A custom Ruby on Rails form builder exists to help use GitLab UI components in HAML.

Use the GitLab UI form builder

To use the GitLab UI form builder:

1. Change form_for to gitlab_ui_form_for.
2. Change f.check_box to f.gitlab_ui_checkbox_component.
3. Remove f.label and instead pass the label as the second argument in f.gitlab_ui_checkbox_component.

For example:

• Before:

  = form_for @group do |f|
    .form-group.gl-mb-3
      .gl-form-checkbox.custom-control.custom-checkbox
        = f.check_box :prevent_sharing_groups_outside_hierarchy, disabled: !can_change_prevent_sharing_groups_outside_hierarchy?(@group), class: 'custom-control-input'
        = f.label :prevent_sharing_groups_outside_hierarchy, class: 'custom-control-label' do
          %span
            = s_('GroupSettings|Prevent members from sending invitations to groups outside of %{group} and its subgroups.').html_safe % { group: link_to_group(@group) }
          %p.help-text= prevent_sharing_groups_outside_hierarchy_help_text(@group)

• After:

  = gitlab_ui_form_for @group do |f|
    .form-group.gl-mb-3
      = f.gitlab_ui_checkbox_component :prevent_sharing_groups_outside_hierarchy,
          s_('GroupSettings|Prevent members from sending invitations to groups outside of %{group} and its subgroups.').html_safe % { group: link_to_group(@group) },
          help_text: prevent_sharing_groups_outside_hierarchy_help_text(@group),
          checkbox_options: { disabled: !can_change_prevent_sharing_groups_outside_hierarchy?(@group) }

Available components

When using the GitLab UI form builder, the following components are available for use in HAML.

NOTE: Currently only the listed components are available but more components are planned.

gitlab_ui_checkbox_component

GitLab UI Docs

Argument	Description	Type	Required (default value)
method	Attribute on the object passed to gitlab_ui_form_for.	Symbol	true
label	Checkbox label.	String	true
help_text	Help text displayed below the checkbox.	String	false (nil)
checkbox_options	Options that are passed to Rails check_box method.	Hash	false ({})
checked_value	Value when checkbox is checked.	String	false ('1')
unchecked_value	Value when checkbox is unchecked.	String	false ('0')
label_options	Options that are passed to Rails label method.	Hash	false ({})

gitlab_ui_radio_component

GitLab UI Docs

Argument	Description	Type	Required (default value)
method	Attribute on the object passed to gitlab_ui_form_for.	Symbol	true
value	The value of the radio tag.	Symbol	true
label	Radio label.	String	true
help_text	Help text displayed below the radio button.	String	false (nil)
radio_options	Options that are passed to Rails radio_button method.	Hash	false ({})
label_options	Options that are passed to Rails label method.	Hash	false ({})