Button

Usage

When to use

• To trigger an action or event, like a form submission.
• For links that require more prominence, such as CTAs (calls-to-action), see Links as Buttons.
• For links that are part of an inverse button group, see Links as Buttons.

When not to use

• For links that are not CTAs or part of an inverse button group, consider Inline or Standalone link.
• To display multiple actions under a single button, use Dropdown.

Sizes

Medium is the preferred size, but use a Button size that best fits the UI (e.g., don’t use a large button in a table).

Full-width buttons fill 100% of the parent container. Use full-width Buttons sparingly.

Full-width button

Types

Primary

Use Primary for the most important action on a page, e.g., for submitting a form. Avoid using multiple Primary buttons on a single page.

Primary

Secondary

Use Secondary for less important actions or when multiple actions of the same importance are needed.

For example:

• for Cancel next to a Submit button.
• when needing to let the user do things like Download or Generate a report but neither are the primary focus or goal of the page.

Secondary

Critical

Use Critical when users take an action that is potentially dangerous. For example, when deleting a cluster.

Critical

Tertiary

Use Tertiary for low-priority actions when lighter visual weight is required.

For example:

• for actions on a page that require even less visual weight or priority than a secondary button (our default for less important actions).
• for controlling form fields (such as adding an additional form field).

Tertiary

Icon position

Buttons are provided with flexible icon use; allowing for leading, trailing, or icon only buttons. Use icons intentionally and only when they provide the user with extra value. Do not create buttons with both leading and trailing icons. Tertiary buttons are required to have either a leading or trailing icon layout to be accessible.

Leading

In most cases, use leading icons. Choose icons that add meaning and clarity to the action described in the button’s text.

Trailing

Consider trailing icons when guiding the user forward through the product.

Use chevron-right to indicate moving forward in a multi-step flow.

Next

Use arrow-right when using the Button for internal links. In most cases, consider using a Standalone Link instead. For more details, please refer to the code documentation.

Use external-link when using the Button for external links. In most cases, consider using a Standalone Link instead. For more details, please refer to the code documentation.

Links as Buttons

The Button component accepts an @href or @route argument, which results in a link with the visual appearance of a button. While in general, we advise against this approach because it can cause confusion for keyboard-only users, there are a few instances where this may be appropriate for improved visual hierarchy, such as:

For links that require more prominence and CTAs (calls-to-action).

For links that are part of an inverse button group.

Learn more about how semantic use helps make our products more conformant.

Button set

ButtonSet is a layout component that provides consistent spacing between multiple Buttons. Refer to the ButtonSet documentation to learn more. ButtonSet is only available in code.

More detailed examples and guidance on button organization can be found in the button organization pattern documentation.

Content

• Text should be short and to the point (~25 characters). Buttons should not consist of full sentences, but should provide enough context to be useful.
• Language should be used consistently within each product (e.g., when using "Edit" on one page, use that same convention throughout the rest of the application, not "Change").

How to use this component

The basic invocation requires text to be passed:

<Hds::Button @text="Basic button" />

Add an icon

To add an icon to your Button, give the @icon any icon name:

<Hds::Button @text="Create cluster" @icon="plus" />

Icon position

By default, if you define an icon, it is placed in the leading position (before the text). If you need to position the icon in the trailing position (after the text), define @iconPosition:

<Hds::Button @text="Next step" @icon="arrow-right" @iconPosition="trailing" />

Icon-only Button

If you would like to create an icon-only Button, set @isIconOnly to true. Note that you still have to define the @text value; it will be used as the aria-label attribute value on the Button element.

<Hds::Button @text="Create cluster" @icon="plus" @isIconOnly={{true}} />

Color

There are four available colors for the Button: primary, secondary, tertiary, and critical. The default is primary. To use a different color, declare another value for @color:

<Hds::Button @text="Secondary" @color="secondary" />

<Hds::Button @text="Tertiary" @color="tertiary" @icon="bulb" />

<Hds::Button @text="Critical" @color="critical" />

Size

There are three sizes available for the Button: small, medium, and large. The default is medium. To use a different size, declare a value for @size:

<Hds::Button @text="Small button" @size="small" />

<Hds::Button @text="Large button" @size="large" />

Full-width

This indicates that the Button should take up the full-width of the parent container. It’s set to false by default.

<Hds::Button @text="Full width button" @isFullWidth={{true}} />

Type

This is the native HTML button attribute, type. There are three possible values: button, submit, and reset. The default type for the Button is submit. To prevent a Button from submitting a form, set type to button.

<Hds::Button @text="Submit" type="submit" />

Actions

Define the action in your route or controller, and add it to the component invocation in your template:

Read the Ember.js guides for more information: Patterns for Actions .

<Hds::Button @text="Alert me" {{on "click" this.alertOnClick}} />

Links

You can generate a link with the visual appearance of a button, by passing an @href or a @route argument to the component.

If you’re passing an @href or a @route argument to the component, this will generate an <a> link, not a <button>. In this case, no type is needed.

With @href

If you pass an @href argument, an <a> link will be generated.

target=“_blank” and rel=“noopener noreferrer” attributes are applied by default. This is the most common case, as internal links are generally handled using a @route argument but can be overridden. If the href points to an internal link, or uses a different protocol (e.g., "mailto" of "ftp"), pass @isHrefExternal=true and it will not add the target and rel attributes.

<Hds::Button @text="Visit website" @icon="external-link" @iconPosition="trailing" @href="https://hashicorp.com" />

With @route

If you pass a @route argument, an <a> link will be generated using a <LinkTo> Ember component. All of the standard arguments for the <LinkTo/LinkToExternal> components are supported (eg. models/model/query/current-when/replace).

If the route is external to your current engine, you have to pass @isRouteExternal=true so it will use <LinkToExternal> instead of <LinkTo> for the @route. For more details, see the Hds::Interactive component.

<Hds::Button @text="Back to homepage" @icon="arrow-left" @route="index" />

Disabled Buttons

To disable a Button, manually add the native disabled attribute:

<Hds::Button @text="Alert me" disabled {{on "click" this.alertOnClick}} />

Component API

Anatomy

* One of these must be present.

States

Disabled buttons should be used sparingly and with intention. Acceptable use cases for disabled buttons include:

• Incomplete flows (e.g., user has not yet completed a required action needed to move forward).
• Permissions restriction.

Conformance rating

When used as recommended, there should not be any WCAG conformance issues with this component.

Button vs. link

While buttons and links have been used interchangeably across the internet for years, understanding the difference between these two and striving for the semantic use of these elements can help make our products more conformant.

How to know which to use

• If it goes to a URL, use a Link.
• If it triggers an action (toggles a state, submits a form, etc.), use a Button.
• When submitting a form and redirecting the user to a different URL, use a Button.

Why strive for semantic use

Users with assistive technology (AT) or keyboard-only users rely on the semantic use of Buttons and Links to determine how to activate the element. Buttons are activated with the Enter/Return key or the Spacebar key, while Links can only be activated with the Enter/Return key.

Applicable WCAG Success Criteria

This section is for reference only. This component intends to conform to the following WCAG Success Criteria:

Support

If any accessibility issues have been found within this component, let us know by submitting an issue.