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Spinners

Indicate the loading state of a component or page with Boosted spinners, built entirely with HTML, CSS, and no JavaScript.

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About

Boosted “spinners” can be used to show the loading state in your projects. They’re built only with HTML and CSS, meaning you don’t need any JavaScript to create them. You will, however, need some custom JavaScript to toggle their visibility. Their appearance, alignment, and sizing can be easily customized with our amazing utility classes.

For accessibility purposes, each loader here includes role="status" and a nested <span class="visually-hidden">Loading...</span>.

The animation effect of this component is dependent on the prefers-reduced-motion media query. See the reduced motion section of our accessibility documentation.

Example

Use the border spinners for a lightweight loading indicator.

<div class="spinner-border" role="status">
  <span class="visually-hidden">Loading...</span>
</div>

Colors

The border spinner uses currentColor for its border-color, meaning you can customize the color with text color utilities. You can use any of our text color utilities on the standard spinner.

<div class="spinner-border text-primary" role="status">
  <span class="visually-hidden">Loading...</span>
</div>
<div class="spinner-border text-secondary" role="status">
  <span class="visually-hidden">Loading...</span>
</div>

Why not use border-color utilities? Each border spinner specifies a transparent border for at least one side, so .border-{color} utilities would override that.

Alignment

Spinners in Boosted are built with rems, currentColor, and display: inline-flex. This means they can easily be resized, recolored, and quickly aligned.

Margin

Use margin utilities like .m-5 for easy spacing.

<div class="spinner-border m-5" role="status">
  <span class="visually-hidden">Loading...</span>
</div>

Placement

Use flexbox utilities, float utilities, or text alignment utilities to place spinners exactly where you need them in any situation.

Flex

<div class="d-flex justify-content-center">
  <div class="spinner-border" role="status">
    <span class="visually-hidden">Loading...</span>
  </div>
</div>

Loading...

<div class="d-flex align-items-center">
  <strong>Loading...</strong>
  <div class="spinner-border ms-auto" role="status" aria-hidden="true"></div>
</div>

Floats

<div class="clearfix">
  <div class="spinner-border float-end" role="status">
    <span class="visually-hidden">Loading...</span>
  </div>
</div>

Text align

<div class="text-center">
  <div class="spinner-border" role="status">
    <span class="visually-hidden">Loading...</span>
  </div>
</div>

Size

Add .spinner-border-sm or .spinner-border-lg to make a smaller spinner that can quickly be used within other components.

<div class="spinner-border spinner-border-sm" role="status">
  <span class="visually-hidden">Loading...</span>
</div>
<div class="spinner-border spinner-border-lg" role="status">
  <span class="visually-hidden">Loading...</span>
</div>

Buttons

Use spinners within buttons to indicate an action is currently processing or taking place. You may also swap the text out of the spinner element and utilize button text as needed.

<button class="btn btn-primary" type="button" disabled>
  <span class="spinner-border spinner-border-sm" role="status" aria-hidden="true"></span>
  <span class="visually-hidden">Loading...</span>
</button>
<button class="btn btn-primary" type="button" disabled>
  <span class="spinner-border spinner-border-sm" role="status" aria-hidden="true"></span>
  Loading...
</button>

Sass

Variables

$spinner-width:           $spacer * 2;
$spinner-height:          $spinner-width;
$spinner-vertical-align:  -.125em;
$spinner-border-width:    $border-width * 3;
$spinner-animation-speed: .75s;

$spinner-width-sm:        $spacer;
$spinner-height-sm:       $spinner-width-sm;
$spinner-border-width-sm: $border-width * 2;

// Boosted mod
$spinner-width-lg:        $spacer * 4;
$spinner-height-lg:       $spinner-width-lg;
$spinner-border-width-lg: $border-width * 4;
// End mod

Keyframes

Used for creating the CSS animations for our spinners. Included in scss/_spinners.scss.

@keyframes spinner-border {
  to { transform: rotate(360deg) #{"/* rtl:ignore */"}; }
}