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Slow down spinners when `prefers-reduced-motion: reduce` (#31882) 

* feature(spinners): slow down spinners when prefers-reduced-motion

* docs(spinners): add reduced motion callout and mention slowing down in accessibility page

* Update spinners.md

* docs(accessibility): rewording

Co-authored-by: XhmikosR <xhmikosr@gmail.com>
Co-authored-by: Patrick H. Lauke <redux@splintered.co.uk>
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Gaël Poupard 2020-10-19 10:42:19 +02:00 committed by GitHub
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9
scss/_spinners.scss
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@ -54,3 +54,12 @@
width: $spinner-width-sm;
height: $spinner-height-sm;
}
@if $enable-reduced-motion {
@media (prefers-reduced-motion: reduce) {
.spinner-border,
.spinner-grow {
animation-duration: $spinner-animation-speed * 2;
}
}
}

4
site/content/docs/5.0/components/spinners.md
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@ -12,6 +12,10 @@ Bootstrap "spinners" can be used to show the loading state in your projects. The
For accessibility purposes, each loader here includes `role="status"` and a nested `<span class="visually-hidden">Loading...</span>`.
{{< callout info >}}
{{< partial "callout-info-prefersreducedmotion.md" >}}
{{< /callout >}}
## Border spinner
Use the border spinners for a lightweight loading indicator.

2
site/content/docs/5.0/getting-started/accessibility.md
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@ -45,7 +45,7 @@ For visually hidden interactive controls, such as traditional "skip" links, use
### Reduced motion
Bootstrap includes support for the [`prefers-reduced-motion` media feature](https://drafts.csswg.org/mediaqueries-5/#prefers-reduced-motion). In browsers/environments that allow the user to specify their preference for reduced motion, most CSS transition effects in Bootstrap (for instance, when a modal dialog is opened or closed, or the sliding animation in carousels) will be disabled.
Bootstrap includes support for the [`prefers-reduced-motion` media feature](https://drafts.csswg.org/mediaqueries-5/#prefers-reduced-motion). In browsers/environments that allow the user to specify their preference for reduced motion, most CSS transition effects in Bootstrap (for instance, when a modal dialog is opened or closed, or the sliding animation in carousels) will be disabled, and meaningful animations (such as spinners) will be slowed down.
## Additional resources