FAQ: Mixins and the & Selector - Mixin Facts

This community-built FAQ covers the “Mixin Facts” exercise from the lesson “Mixins and the & Selector”.

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This exercise can be found in the following Codecademy content:

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FAQs on the exercise Mixin Facts

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I think this lesson would be easier to understand if it were written as follows:

Mixins can take multiple arguments. If a mixin definition has a combination of arguments with and without a default value, you should define the ones with no default value first.

@mixin dashed-border($width, $color: #FFF) {
  border: {
    color: $color;
    width: $width;
    style: dashed;

Sass allows you to explicitly define each argument in your @include statement.

//only passes non-default argument
span { 
  @include dashed-border(3px);
//passes both arguments 
p { 
  @include dashed-border(3px, green);

When values are explicitly specified you can send them out of order.

div {
  @include dashed-border(color: purple, width: 5px);

Mixins can be nested.
(Show some example here…)

1 Like

Yeah I am on this two years into the future… Not loving this course very much at all but I’m going to finish it. Why are they teaching a Mixin with a vendor property ? I feel like it would be much more tangible to do with a vanilla property. I do think your refactoring of the lesson is useful.

Also the Titanosaur card is still bugged and haven’t even been able to do the copy paste work around mentioned in other threads. Also not even convinced from my first interaction with Sass especially since CSS has variables that this is worth it ??

the exercise, it still has a bug.@include transform(rotatey(-180deg));
with this command even copied and paste, the exercise check it wrong.