Understanding placeholder selectors (Generated by SassMeister.com)

SassMeister-input.scss

// ----
// libsass (v3.2.5)
// ----

/*
Source: http://thesassway.com/intermediate/understanding-placeholder-selectors
Topic: Understanding placeholder selectors
*/

@mixin icon {
  transition: background-color ease .2s;
  margin: 0 .5em;
}

.error-icon {
  @include icon;
  /* error specific styles... */
}

.info-icon {
  @include icon;
  /* info specific styles... */
}

SassMeister-output.css

/*
Source: http://thesassway.com/intermediate/understanding-placeholder-selectors
Topic: Understanding placeholder selectors
*/
.error-icon {
  transition: background-color ease 0.2s;
  margin: 0 0.5em;
  /* error specific styles... */
}

.info-icon {
  transition: background-color ease 0.2s;
  margin: 0 0.5em;
  /* info specific styles... */
}