Nested mixins or functions in SASS

Question

Some body know how can i use nested mixins or functions in SASS? I have something like this:

@mixin A(){
    do something....
}

@mixin B($argu){
    @include A();
}

Solution 1

yeah you already doing it right. You can call first mixin in second one. check this pen http://codepen.io/crazyrohila/pen/mvqHo

Solution 2

You can multi nest mixins, you can also use place holders inside mixins..

@mixin a {
  color: red;
}
@mixin b {
  @include a();
  padding: white;
  font-size: 10px;
}
@mixin c{
  @include b;
  padding:5;
}
div {
  @include c();
}

which gives out CSS

div {
  color: red;
  padding: white;
  font-size: 10px;
  padding: 5;
}

Solution 3

As mentioned in the other answers, you can include mixins in other mixins. In addition, you can scope your mixins.

Example

.menu {
  user-select: none;

  .theme-dark & {
    color: #fff;
    background-color: #333;

    // Scoped mixin
    // Can only be seen in current block and descendants,
    // i.e., referencing it from outside current block
    // will result in an error.
    @mixin __item() {
      height: 48px;
    }

    &__item {
      @include __item();

      &_type_inverted {
        @include __item();

        color: #333;
        background-color: #fff;
      }
    }
  }
}

Will output:

.menu {
  user-select: none;
}

.theme-dark .menu {
  color: #fff;
  background-color: #333;
}

.theme-dark .menu__item {
  height: 48px;
}

.theme-dark .menu__item_type_inverted {
  height: 48px;
  color: #333;
  background-color: #fff;
}

Scoping mixins means that you can have multiple mixins named the same in different scopes without conflicts arising.

Comments

[crazyrohila]

yeah you doing it right. You can call first mixin in second one. check this pen.

[iLevi]

oh, thank you! i tried with this, but isnt working, maybe my ruby is crashing. I will try to re-install. Thank you. (codepen is amazing!, not yet known)

[Pavlo]

@crazyrohila You should post this as an answer.

[crazyrohila]

Sorry I have deleted last pen by mistake. so created a new pen.

[cimmanon]

It's unclear here why running this code didn't answer your question.

[dkjain]

It must be noted that order of mixin is important i.e. if you move @mixin a{...} at the bottom of above code, sass generate compile error Undefined mixin 'a'

[ajax333221]

any reason b is not b() in @include b; ?

[orionrush]

@ajax333221 mixins don't HAVE to have parameters, if you don't specify params then the () are optional.