A button is used to trigger immediate actions.

Use title-case capitalization for button labels.

Use verbs in button labels.

Add an ellipsis to the button label when completing the task requires additional information

Simple Button

<button class="ui-button">Push Me</button>


Do not mix the size of buttons within a group.

<div> <button class="ui-button xs">Extra-Small</button> <button class="ui-button sm">Small</button> <button class="ui-button md">Medium</button> <button class="ui-button lg">Large</button> <button class="ui-button xl">Extra-Large</button> </div>


Use the primary variant for the most important or most likely action. There should be one primary button per page.

Use the secondary variant to indicate the most important or most likely action, but with a decreases emphasis. Don’t use a secondary button if there’s already a primary button on the page.

Use the critical variant for destructive actions. Keep these buttons separated from other buttons.

Use the lightweight variants to reduce the visual weight of the buttons.

<h3>Regular</h3> <div class="ui-buttons"> <button class="ui-button">Default</button> <button class="ui-button primary">Primary</button> <button class="ui-button secondary">Secondary</button> <button class="ui-button critical">Critical</button> </div> <h3>Lightweight</h3> <div> <button class="ui-button lightweight">Lightweight</button> <button class="ui-button lightweight primary">Primary</button> <button class="ui-button lightweight secondary">Secondary</button> <button class="ui-button lightweight critical">Critical</button> </div>


<div> <button class="ui-button">Enabled</button> <button class="ui-button" disabled>Disabled</button> </div>
<div> <button class="ui-button">Regular</button> <button class="ui-button active">Active</button> </div>