Chris@0: /**
Chris@0:  * @file
Chris@0:  * Utility classes to hide elements in different ways.
Chris@0:  */
Chris@0: 
Chris@0: /**
Chris@0:  * Hide elements from all users.
Chris@0:  *
Chris@0:  * Used for elements which should not be immediately displayed to any user. An
Chris@0:  * example would be collapsible details that will be expanded with a click
Chris@0:  * from a user. The effect of this class can be toggled with the jQuery show()
Chris@0:  * and hide() functions.
Chris@0:  */
Chris@0: .hidden {
Chris@0:   display: none;
Chris@0: }
Chris@0: 
Chris@0: /**
Chris@0:  * Hide elements visually, but keep them available for screen readers.
Chris@0:  *
Chris@0:  * Used for information required for screen reader users to understand and use
Chris@0:  * the site where visual display is undesirable. Information provided in this
Chris@0:  * manner should be kept concise, to avoid unnecessary burden on the user.
Chris@0:  * "!important" is used to prevent unintentional overrides.
Chris@0:  */
Chris@0: .visually-hidden {
Chris@0:   position: absolute !important;
Chris@18:   overflow: hidden;
Chris@0:   clip: rect(1px, 1px, 1px, 1px);
Chris@18:   width: 1px;
Chris@0:   height: 1px;
Chris@0:   word-wrap: normal;
Chris@0: }
Chris@0: 
Chris@0: /**
Chris@0:  * The .focusable class extends the .visually-hidden class to allow
Chris@0:  * the element to be focusable when navigated to via the keyboard.
Chris@0:  */
Chris@0: .visually-hidden.focusable:active,
Chris@0: .visually-hidden.focusable:focus {
Chris@0:   position: static !important;
Chris@18:   overflow: visible;
Chris@0:   clip: auto;
Chris@18:   width: auto;
Chris@0:   height: auto;
Chris@0: }
Chris@0: 
Chris@0: /**
Chris@0:  * Hide visually and from screen readers, but maintain layout.
Chris@0:  */
Chris@0: .invisible {
Chris@0:   visibility: hidden;
Chris@0: }