mixins

los mixins son porciones de codigo reutilizables equivalente a una funcion pero son para definir valores

scss

@mixin theme($theme: DarkGray) {
  background: $theme;
  box-shadow: 0 0 1px rgba($theme, .25);
  color: #fff;
}

.info {
  @include theme;
}
.alert {
  @include theme($theme: DarkRed);
}
.success {
  @include theme($theme: DarkGreen);
}

@mixin theme($theme: DarkGray) {
  background: $theme;
  box-shadow: 0 0 1px rgba($theme, .25);
  color: #fff;
}

.info {
  @include theme;
}
.alert {
  @include theme($theme: DarkRed);
}
.success {
  @include theme($theme: DarkGreen);
}

sass

@mixin theme($theme: DarkGray)
  background: $theme
  box-shadow: 0 0 1px rgba($theme, .25)
  color: #fff


.info
  @include theme

.alert
  @include theme($theme: DarkRed)

.success
  @include theme($theme: DarkGreen)

@mixin theme($theme: DarkGray)
  background: $theme
  box-shadow: 0 0 1px rgba($theme, .25)
  color: #fff


.info
  @include theme

.alert
  @include theme($theme: DarkRed)

.success
  @include theme($theme: DarkGreen)

less

.bordered {
  border-top: dotted 1px black;
  border-bottom: solid 2px black;
}

#menu a {
  color: #111;
  .bordered();
}

.post a {
  color: red;
  .bordered();
}

.bordered {
  border-top: dotted 1px black;
  border-bottom: solid 2px black;
}

#menu a {
  color: #111;
  .bordered();
}

.post a {
  color: red;
  .bordered();
}

dato curioso en less si no asignamos el mixin se comporta como un selector de clase

stylus

border-radius(n)
  -webkit-border-radius n
  -moz-border-radius n
  border-radius n

form input[type=button]
  border-radius(5px)

border-radius(n)
  -webkit-border-radius n
  -moz-border-radius n
  border-radius n

form input[type=button]
  border-radius(5px)

mixins ​

mixins