Generated by SassMeister.com.

SassMeister-input-HTML.html

<div class="parent-class dropdown-toggle">Hi</div>
<div class="dropdown-toggle parent-class">Hi</div>

SassMeister-input.scss

// ----
// Sass (v3.3.4)
// Compass (v1.0.0.alpha.18)
// ----

.parent-class {
  &.dropdown-toggle {
    color: red;
  } 
}

.dropdown-toggle {
  &.parent-class {
    color: blue;
  } 
}

SassMeister-output.css

.parent-class.dropdown-toggle {
  color: red;
}

.dropdown-toggle.parent-class {
  color: blue;
}

SassMeister-rendered.html

<div class="parent-class dropdown-toggle">Hi</div>
<div class="dropdown-toggle parent-class">Hi</div>