git.roojs.org Git - roojs1/blob - scss/bootstrap/mixins/_screen-reader.scss

   1 // Only display content to screen readers
   2 //
   3 // See: https://www.a11yproject.com/posts/2013-01-11-how-to-hide-content/
   4 // See: https://hugogiraudel.com/2016/10/13/css-hide-and-seek/
   5
   6 @mixin sr-only() {
   7   position: absolute;
   8   width: 1px;
   9   height: 1px;
  10   padding: 0;
  11   margin: -1px; // Fix for https://github.com/twbs/bootstrap/issues/25686
  12   overflow: hidden;
  13   clip: rect(0, 0, 0, 0);
  14   white-space: nowrap;
  15   border: 0;
  16 }
  17
  18 // Use in conjunction with .sr-only to only display content when it's focused.
  19 //
  20 // Useful for "Skip to main content" links; see https://www.w3.org/TR/2013/NOTE-WCAG20-TECHS-20130905/G1
  21 //
  22 // Credit: HTML5 Boilerplate
  23
  24 @mixin sr-only-focusable() {
  25   &:active,
  26   &:focus {
  27     position: static;
  28     width: auto;
  29     height: auto;
  30     overflow: visible;
  31     clip: auto;
  32     white-space: normal;
  33   }
  34 }