@fortawesome/fontawesome-free/less/_screen-reader.less

The iconic font, CSS, and SVG framework

// screen-reader utilities
// -------------------------

// only display content to screen readers
.sr-only,
.@{fa-css-prefix}-sr-only {
  .fa-sr-only();
}

// use in conjunction with .sr-only to only display content when it's focused
.sr-only-focusable,
.@{fa-css-prefix}-sr-only-focusable {
  .fa-sr-only-focusable();
}