A list of my LESS mixins

LESS Mixins

.box-sizing(@box-model) {
 -webkit-box-sizing: @box-model; // Safari <= 5
    -moz-box-sizing: @box-model; // Firefox <= 19
         box-sizing: @box-model;
}

.border-top-radius(@radius) {
  border-top-right-radius: @radius;
  border-top-left-radius: @radius;
}
.border-right-radius(@radius) {
  border-bottom-right-radius: @radius;
  border-top-right-radius: @radius;
}
.border-bottom-radius(@radius) {
  border-bottom-right-radius: @radius;
  border-bottom-left-radius: @radius;
}
.border-left-radius(@radius) {
  border-bottom-left-radius: @radius;
  border-top-left-radius: @radius;
}

.box-shadow(@shadow: 0 1px 3px rgba(0,0,0,.25)) {
  -webkit-box-shadow: @shadow; // iOS <4.3 & Android <4.1
          box-shadow: @shadow;
}

 .transition(@transition) {
    -webkit-transition: @transition;
       -moz-transition: @transition;
         -o-transition: @transition;
            transition: @transition;
  }
.transition-delay(@transition-delay) {
  -webkit-transition-delay: @transition-delay;
     -moz-transition-delay: @transition-delay;
       -o-transition-delay: @transition-delay;
          transition-delay: @transition-delay;
}
.transition-duration(@transition-duration) {
  -webkit-transition-duration: @transition-duration;
     -moz-transition-duration: @transition-duration;
       -o-transition-duration: @transition-duration;
          transition-duration: @transition-duration;
}

.rotate(@degrees) {
  -webkit-transform: rotate(@degrees);
     -moz-transform: rotate(@degrees);
      -ms-transform: rotate(@degrees);
       -o-transform: rotate(@degrees);
          transform: rotate(@degrees);
}
.scale(@ratio) {
  -webkit-transform: scale(@ratio);
     -moz-transform: scale(@ratio);
      -ms-transform: scale(@ratio);
       -o-transform: scale(@ratio);
          transform: scale(@ratio);
}
.translate(@x, @y) {
  -webkit-transform: translate(@x, @y);
     -moz-transform: translate(@x, @y);
      -ms-transform: translate(@x, @y);
       -o-transform: translate(@x, @y);
          transform: translate(@x, @y);
}
.skew(@x, @y) {
  -webkit-transform: skew(@x, @y);
     -moz-transform: skew(@x, @y);
      -ms-transform: skewX(@x) skewY(@y);
       -o-transform: skew(@x, @y);
          transform: skew(@x, @y);
  -webkit-backface-visibility: hidden;
}
.translate3d(@x, @y, @z) {
  -webkit-transform: translate3d(@x, @y, @z);
     -moz-transform: translate3d(@x, @y, @z);
       -o-transform: translate3d(@x, @y, @z);
          transform: translate3d(@x, @y, @z);
}

.opacity(@opacity) {
  opacity: @opacity;
  @opacity-ie: @opacity * 100;
  filter: ~"alpha(opacity=@{opacity-ie})"; // IE8
}

.placeholder(@color: @input-color-placeholder) {
  &:-moz-placeholder            { color: @color; } // Firefox 4-18
  &::-moz-placeholder           { color: @color; } // Firefox 19+
  &:-ms-input-placeholder       { color: @color; } // Internet Explorer 10+
  &::-webkit-input-placeholder  { color: @color; } // Safari and Chrome
}

.font-size(@px: 12) {
  @rem: @px / 10;
  font-size: ~"@{px}px";
  font-size: ~"@{rem}rem";
}

.line-height (@px) {
  @rem: @px / 10;
  line-height: ~"@{px}px";
  line-height: ~"@{rem}rem";
}