Bootstrap/site/content/docs/4.3/components/buttons.md

layout	title	description	group	toc
docs	Buttons	Use Bootstrap's custom button styles for actions in forms, dialogs, and more with support for multiple sizes, states, and more.	components	true

Examples

Bootstrap includes several predefined button styles, each serving its own semantic purpose, with a few extras thrown in for more control.

{{< example >}} {{< buttons.inline >}} {{- range (index $.Site.Data "theme-colors") }} {{ .name | title }} {{- end -}} {{< /buttons.inline >}}

Link {{< /example >}}

{{< callout info >}} {{< partial "callout-warning-color-assistive-technologies.md" >}} {{< /callout >}}

Button tags

The .btn classes are designed to be used with the <button> element. However, you can also use these classes on <a> or <input> elements (though some browsers may apply a slightly different rendering).

When using button classes on <a> elements that are used to trigger in-page functionality (like collapsing content), rather than linking to new pages or sections within the current page, these links should be given a role="button" to appropriately convey their purpose to assistive technologies such as screen readers.

{{< example >}} Link Button {{< /example >}}

Outline buttons

In need of a button, but not the hefty background colors they bring? Replace the default modifier classes with the .btn-outline-* ones to remove all background images and colors on any button.

{{< example >}} {{< buttons.inline >}} {{- range (index $.Site.Data "theme-colors") }} {{ .name | title }} {{- end -}} {{< /buttons.inline >}} {{< /example >}}

Sizes

Fancy larger or smaller buttons? Add .btn-lg or .btn-sm for additional sizes.

{{< example >}} Large button Large button {{< /example >}}

{{< example >}} Small button Small button {{< /example >}}

Create block level buttons—those that span the full width of a parent—by adding .btn-block.

{{< example >}} Block level button Block level button {{< /example >}}

Active state

Buttons will appear pressed (with a darker background, darker border, and inset shadow) when active. There's no need to add a class to <button>s as they use a pseudo-class. However, you can still force the same active appearance with .active (and include the aria-pressed="true" attribute) should you need to replicate the state programmatically.

{{< example >}} Primary link Link {{< /example >}}

Disabled state

Make buttons look inactive by adding the disabled boolean attribute to any <button> element.

{{< example >}} Primary button Button {{< /example >}}

Disabled buttons using the <a> element behave a bit different:

• <a>s don't support the disabled attribute, so you must add the .disabled class to make it visually appear disabled.
• Some future-friendly styles are included to disable all pointer-events on anchor buttons. In browsers which support that property, you won't see the disabled cursor at all.
• Disabled buttons should include the aria-disabled="true" attribute to indicate the state of the element to assistive technologies.

{{< example >}} Primary link Link {{< /example >}}

{{< callout warning >}}

Link functionality caveat

The .disabled class uses pointer-events: none to try to disable the link functionality of <a>s, but that CSS property is not yet standardized. In addition, even in browsers that do support pointer-events: none, keyboard navigation remains unaffected, meaning that sighted keyboard users and users of assistive technologies will still be able to activate these links. So to be safe, add a tabindex="-1" attribute on these links (to prevent them from receiving keyboard focus) and use custom JavaScript to disable their functionality. {{< /callout >}}

Button plugin

Do more with buttons. Control button states or create groups of buttons for more components like toolbars.

Toggle states

Add data-toggle="button" to toggle a button's active state. If you're pre-toggling a button, you must manually add the .active class and aria-pressed="true" to the <button>.

{{< example >}} Single toggle {{< /example >}}

Checkbox and radio buttons

Bootstrap's .button styles can be applied to other elements, such as <label>s, to provide checkbox or radio style button toggling. Add data-toggle="buttons" to a .btn-group containing those modified buttons to enable their toggling behavior via JavaScript and add .btn-group-toggle to style the <input>s within your buttons. Note that you can create single input-powered buttons or groups of them.

The checked state for these buttons is only updated via click event on the button. If you use another method to update the input—e.g., with <input type="reset"> or by manually applying the input's checked property—you'll need to toggle .active on the <label> manually.

Note that pre-checked buttons require you to manually add the .active class to the input's <label>.

{{< example >}}

Checked

{{< /example >}}

{{< example >}}

Active Radio Radio

{{< /example >}}

Methods

You can create a button instance with the button constructor, for example:

{{< highlight js >}} var button = document.getElementById('myButton') var bsButton = new bootstrap.Button(button) {{< /highlight >}}

Method	Description
toggle	Toggles push state. Gives the button the appearance that it has been activated.
dispose	Destroys an element's button.

For example, to toggle all buttons

{{< highlight js >}} var buttons = document.querySelectorAll('.btn') buttons.forEach(function (button) { var button = new bootstrap.Button(button) button.toggle() }) {{< /highlight >}}