// tapcolor
.setTapColor(@c:rgba(0,0,0,0)) {
  -webkit-tap-highlight-color: @c;
}

//user action
.no_select() {
  -webkit-touch-callout: none;
  -webkit-user-select: none;
  -khtml-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
}