Mixin Stretch sets value 0 on unspecified values

[dcondrey]

div { @include stretch($offset-top:5px); }

Output:

div { position: absolute;top: 5px;bottom: 0;left: 0;right: 0; }

Expected:

div { position: absolute;top: 5px; }

Setting the 0 values causes unexpected errors in layout because these values were intentionally to be undefined or inherited.

[cimmanon]

It sounds like what you want is not the stretch mixin at all. Looking at the source of the mixin, it should be obvious what you're getting. If you don't want that, either don't use the mixin (absolutely positioning an element 5px from the top is not what I would call "stretching") or set the other values to null:

div { @include stretch(5px, null, null, null); }

Output:

div {
  position: absolute;
  top: 5px;
}