bootstrap/less/utilities.less

//
// Utility classes
// --------------------------------------------------


// Quick floats
.pull-right {
  float: right;
}
.pull-left {
  float: left;
}

// Toggling content
// Uses `!important` for proper specifity over things like form controls
.hide {
  display: none !important;
}
.show {
  display: block !important;
}

// Visibility
.invisible {
  visibility: hidden;
}