twbs--bootstrap/scss/_utilities.scss

//
// Floats
//

.clearfix {
  @include clearfix();
}

.center-block {
  @include center-block();
}

@each $breakpoint in map-keys($grid-breakpoints) {
  @include media-breakpoint-up($breakpoint) {
    .pull-#{$breakpoint}-left {
      @include pull-left();
    }
    .pull-#{$breakpoint}-right {
      @include pull-right();
    }
    .pull-#{$breakpoint}-none {
      float: none !important;
    }
  }
}


//
// Screenreaders
//

.sr-only {
  @include sr-only();
}

.sr-only-focusable {
  @include sr-only-focusable();
}

.invisible {
  visibility: hidden !important;
}

.text-hide {
  @include text-hide();
}


//
// Text
//

// Alignment

.text-justify        { text-align: justify !important; }
.text-nowrap         { white-space: nowrap !important; }
.text-truncate       { @include text-truncate; }

// Responsive alignment

@each $breakpoint in map-keys($grid-breakpoints) {
  @include media-breakpoint-up($breakpoint) {
    .text-#{$breakpoint}-left   { text-align: left !important; }
    .text-#{$breakpoint}-right  { text-align: right !important; }
    .text-#{$breakpoint}-center { text-align: center !important; }
  }
}

// Transformation

.text-lowercase      { text-transform: lowercase !important; }
.text-uppercase      { text-transform: uppercase !important; }
.text-capitalize     { text-transform: capitalize !important; }

// Contextual colors

.text-muted {
  color: $text-muted;
}

@include text-emphasis-variant('.text-primary', $brand-primary);

@include text-emphasis-variant('.text-success', $brand-success);

@include text-emphasis-variant('.text-info', $brand-info);

@include text-emphasis-variant('.text-warning', $brand-warning);

@include text-emphasis-variant('.text-danger', $brand-danger);