diff --git a/scss/mixins/_transition.scss b/scss/mixins/_transition.scss index 54983d736c59..54553deb9c67 100644 --- a/scss/mixins/_transition.scss +++ b/scss/mixins/_transition.scss @@ -1,13 +1,23 @@ // stylelint-disable property-blacklist @mixin transition($transition...) { + @if length($transition) == 0 { + $transition: $transition-base; + } + + @if length($transition) > 1 { + @each $value in $transition { + @if $value == null or $value == none { + @warn "The keyword 'none' or 'null' must be used as a single argument."; + } + } + } + @if $enable-transitions { - @if length($transition) == 0 { - transition: $transition-base; - } @else { + @if nth($transition, 1) != null { transition: $transition; } - @if $enable-prefers-reduced-motion-media-query { + @if $enable-prefers-reduced-motion-media-query and nth($transition, 1) != null and nth($transition, 1) != none { @media (prefers-reduced-motion: reduce) { transition: none; }