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Expand visually-hidden-focusable so it can be used on a container, so the container becomes visible when focus is inside it / on one of its child elements.

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Patrick H. Lauke 2020-12-11 23:28:45 +02:00 committed by XhmikosR
parent 9b6c815148
commit eae52b1cb0
4 changed files with 12 additions and 5 deletions
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2
scss/helpers/_visually-hidden.scss
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@ -3,6 +3,6 @@
//
.visually-hidden,
.visually-hidden-focusable:not(:focus) {
.visually-hidden-focusable:not(:focus):not(:focus-within) {
@include visually-hidden();
}

5
scss/mixins/_visually-hidden.scss
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@ -17,12 +17,13 @@
border: 0 !important;
}
// Use to only display content when it's focused.
// Use to only display content when it's focused, or one of its child elements is focused
// (i.e. when focus is within the element/container that the class was applied to)
//
// Useful for "Skip to main content" links; see https://www.w3.org/TR/2013/NOTE-WCAG20-TECHS-20130905/G1
@mixin visually-hidden-focusable() {
&:not(:focus) {
&:not(:focus):not(:focus-within) {
@include visually-hidden();
}
}

5
site/content/docs/5.0/helpers/visually-hidden.md
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@ -6,13 +6,16 @@ group: helpers
aliases: "/docs/5.0/helpers/screen-readers/"
---
Visually hide an element while still allowing it to be exposed to assistive technologies (such as screen readers) with `.visually-hidden`. Use `.visually-hidden-focusable` to visually hide an element by default, but to display it when it's focused (e.g. by a keyboard-only user). Can also be used as mixins.
Visually hide an element while still allowing it to be exposed to assistive technologies (such as screen readers) with `.visually-hidden`. Use `.visually-hidden-focusable` to visually hide an element by default, but to display it when it's focused (e.g. by a keyboard-only user). `.visually-hidden-focusable` can also be applied to a container–thanks to `:focus-within`, the container will be displayed when any child element of the container receives focus.
{{< example >}}
<h2 class="visually-hidden">Title for screen readers</h2>
<a class="visually-hidden-focusable" href="#content">Skip to main content</a>
<div class="visually-hidden-focusable">A container with a <a href="#">focusable element</a>.</div>
{{< /example >}}
Both `visually-hidden` and `visually-hidden-focusable` can also be used as mixins.
```scss
// Usage as a mixin

5
site/content/docs/5.0/migration.md
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@ -9,6 +9,10 @@ toc: true
## v5.0.0-beta2
### Sass
- Extended the `.visually-hidden-focusable` helper to also work on containers, using `:focus-within`.
### JavaScript
- The default value for the `fallbackPlacements` is changed to `['top', 'right', 'bottom', 'left']` for better placement of popper elements.
@ -58,7 +62,6 @@ Breakpoints specific variants are consequently renamed too (eg. `.text-md-start`
- Renamed `$form-check-inline-margin-right` to `$form-check-inline-margin-end`.
- Renamed `$form-select-feedback-icon-padding-right` to `$form-select-feedback-icon-padding-end`.
### JavaScript
- Data attributes for all JavaScript plugins are now namespaced to help distinguish Bootstrap functionality from third parties and your own code. For example, we use `data-bs-toggle` instead of `data-toggle`.