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* Moves the sidebar into the header so that user can tab directly from the sidebar button into the sidebar (when open). * Because the sidebar is absolutely positioned inside the header and the header applies a top-margin, we need to adjust the top position calculation for the sidebar. * Removes the checkbox from the accessibility tree through CSS `display: none;` instead of HTML attributes. * Given that the checkbox is not able to receive focus, the `#mw-sidebar-checkbox:focus ~ .mw-header .mw-checkbox-hack-button` CSS rule is obsolete and moved instead to the label button. An additional outline: 0 rule was added to remove the dotted outline that Firefox applies. * Makes the "Skip to navigation" jump link point to the sidebar now. After the sidebar has been tabbed through, the rest of the navigation can be tabbed to. Bug: T246420 Change-Id: I981da3650854568bb9cfbf3c6c59e7625e7d094c
48 lines
1.9 KiB
Plaintext
48 lines
1.9 KiB
Plaintext
// This file is being considered for Core as part of T252774.
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// Notes:
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//
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// - Usage requires three elements: a hidden checkbox input, a button, and a show / hide target.
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// - By convention, the checked state is considered expanded or visible. Unchecked is considered
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// hidden.
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// - Please see additional documentation in checkboxHack.js for example HTML and JavaScript
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// integration.
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//
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// Example supplemental styles (to be added on a per use case basis):
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//
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// - Animate target in and out from start (left in LTR) to end (right in LTR):
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//
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// .mw-checkbox-hack-checkbox:not( :checked ) ~ .mw-checkbox-hack-target {
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// // Turn off presentation so that screen readers get the same effect as visually
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// // hiding. Visibility and opacity can be animated. If animation is unnecessary, all
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// // of this can be replaced with `display: none` instead to avoid hidden rendering.
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// visibility: hidden;
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// opacity: 0;
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// @timing: @transition-duration-base ease-in-out;
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// .transition( transform @timing, opacity @timing, visibility @timing; );
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// .transform( translateX( -100% ) );
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// }
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//
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// - Show / hide the target instantly without animation:
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//
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// .mw-checkbox-hack-checkbox:not( :checked ) ~ .mw-checkbox-hack-target {
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// display: none;
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// }
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@import 'mediawiki.ui/variables.less';
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@import 'mediawiki.mixins.less';
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.mw-checkbox-hack-checkbox {
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// We don't want the browser to focus on the checkbox so we remove it from the
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// accessibility tree. Instead, we want the label button to receive focus
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// which has a tabindex of '0'.
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display: none;
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}
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.mw-checkbox-hack-button {
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// Labels are inlined by default but are also an icon having width and height specified.
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display: inline-block;
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// Use the hand icon for the toggle button which is actually a checkbox label.
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cursor: pointer;
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}
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