Rails SASS compiler doesn't know compass animation

Question

I am using

@include keyframes(small) {
  0% {
    opacity: 0;
  }
  100% {
    opacity: 0;
  }
}

.small {
  @include animation(small 1s infinite);
}

And rails gives me the following error:

Sass::SyntaxError at /
Undefined mixin 'keyframes'. (or 'animation')

I am using latest SASS and compass --pre (alpha) which is supposed to support animations.

Answer 1

Try using the following combination of gems in your GemFile:

gem "sass", "~> 3.2.19"
gem 'sass-rails', '~> 4.0.4'
gem "compass", "~> 0.12.7"
gem 'compass-rails', '~> 2.0.0'

And then make sure you have the following lines at the top of your scss file:

@import "compass";
@import "compass/css3";

Answer 2

The following gemfile updates should do it...

# compass 1.0 needed to use keyframe mixin
# but compass 1.0 needs Sass 3.3 (further below)
gem "compass", "~> 1.0" 
gem 'compass-rails'

# use sass-rails ~>5.0 to get Sass ~>3.3 
# needed for compass ~>1.0 
# which is needed for keyframes mixin
gem 'sass-rails', "~>5.0"