Generated by SassMeister.com.

SassMeister-input.scss

// ----
// libsass (v3.3.2)
// ----

%placeholder {
  width: 100px;
  height: 100px;
}

%placeholder {
  width: 200px;
  height: 300px;
}

.foo {
  @extend %placeholder;
}

SassMeister-output.css

.foo {
  width: 100px;
  height: 100px;
}

.foo {
  width: 200px;
  height: 300px;
}