A tooltip should only be added if additional information is required.
### Placement
By default, tooltips should be placed below the element that they refer to. However, if there is not enough space in the viewpoint, the tooltip should be moved to the side as needed.
Anchor links are used for navigational actions and lone, secondary commands (such as 'Reset filters' on the Issues List) when deemed appropriate by the UX team.
### States
#### Rest
Primary links are blue in their rest state. Secondary links (such as the time stamp on comments) are a neutral gray color in rest. Details on the main GitLab navigation links can be found on the [features](features.md#navigation) page.
#### Hover
An underline should always be added on hover. A gray link becomes blue on hover.
#### Focus
The focus state should match the hover state.
---
## Buttons
Buttons communicate the command that will occur when the user clicks on them.
### Types
#### Primary
Primary buttons communicate the main call to action. There should only be one call to action in any given experience. Visually, primary buttons are conveyed with a full background fill
#### Secondary
Secondary buttons are for alternative commands. They should be conveyed bya button with an stroke, and no background fill.
Text should be in sentence case, where only the first word is capitalized. "Create issue" is correct, not "Create Issue". Buttons should only contain an icon or a text, not both.
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TODO: Rationalize this. Ensure that we still believe this.
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### Colors
Follow the color guidance on the [basics](basics.md#color) page. The default color treatment is the white/grey button.
---
## Dropdowns
Dropdowns are used to allow users to choose one (or many) options from a list of options. If this list of options is more 20, there should generally be a way to search through and filter the options (see the complex filter dropdowns below.)
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TODO: Will update this section when the new filters UI is implemented.
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---
## Counts
A count element is used in navigation contexts where it is helpful to indicate the count, or number of items, in a list. Always use the [`number_with_delimiter`][number_with_delimiter] helper to display counts in the UI.
Lists are used where ever there is a single column of information to display. Ths [issues list](https://gitlab.com/gitlab-org/gitlab-ce/issues) is an example of a important list in the GitLab UI.
### Types
Simple list using .content-list
List with avatar, title and description using .content-list
List with hover effect .well-list
When the information is too complex for a list, with multiple columns of information, a table can be used. For example, the [pipelines page](https://gitlab.com/gitlab-org/gitlab-ce/pipelines) uses a table.
---
## Blocks
Blocks are a way to group related information.
### Types
#### Content blocks
Content blocks (`.content-block`) are the basic grouping of content. They are commonly used in [lists](#lists), and are separated by a botton border.
#### Row content blocks
A background color can be added to this blocks. For example, items in the [issue list](https://gitlab.com/gitlab-org/gitlab-ce/issues) have a green background if they were created recently. Below is an example of a gray content block with side padding using `.row-content-block`.
Cover blocks are generally used to create a heading element for a page, such as a new project, or a user profile page. Below is a cover block (`.cover-block`) for the profile page with an avatar, name and description.
---
## Panels
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TODO: Catalog how we are currently using panels and rationalize how they relate to alerts
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---
## Alerts
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TODO: Catalog how we are currently using alerts
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---
## Forms
There are two options shown below regarding the positioning of labels in forms. Both are options to consider based on context and available size. However, it is important to have a consistent treatment of labels in the same form.
### Types
#### Labels stack vertically
Form (`form`) with label rendered above input.
#### Labels side-by-side
Horizontal form (`form.horizontal-form`) with label rendered inline with input.
Format for exacts dates should be ‘Mon DD, YYYY’, such as the examples below.
#### Relative
This format relates how long since an action has occurred. The exact date can be shown as a tooltip on hover.
### References
Referencing GitLab items depends on a symbol for each type of item. Typing that symbol will invoke a dropdown that allows you to search for and autocomplete the item you were looking for. References are shown as [links](#links) in context, and hovering on them shows the full title or name of the item.
