tools/side_chain_tool/web/node_modules/bootstrap/scss/mixins/_screen-reader.scss

   1 // Only display content to screen readers
   2 //
   3 // See: https://a11yproject.com/posts/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   overflow: hidden;
  12   clip: rect(0, 0, 0, 0);
  13   white-space: nowrap;
  14   border: 0;
  15 }
  16
  17 // Use in conjunction with .sr-only to only display content when it's focused.
  18 //
  19 // Useful for "Skip to main content" links; see https://www.w3.org/TR/2013/NOTE-WCAG20-TECHS-20130905/G1
  20 //
  21 // Credit: HTML5 Boilerplate
  22
  23 @mixin sr-only-focusable {
  24   &:active,
  25   &:focus {
  26     position: static;
  27     width: auto;
  28     height: auto;
  29     overflow: visible;
  30     clip: auto;
  31     white-space: normal;
  32   }
  33 }