Multiple values for one property with variable argument lists in Sass
Solution 1:
You can create a variable outside the loop to "collect" the shadow values, and then use that variable in your text-shadow property. Example:
=stacktextshadow($shadows...)
$all: ()
@for $i from 1 through length($shadows)
$all: append($all, append($i*1px $i*1px 0, nth($shadows, $i)), comma)
text-shadow: $all
h1
+stacktextshadow(blue, red, green)
Output:
h1 {
text-shadow: 1px 1px 0 blue, 2px 2px 0 red, 3px 3px 0 green; }