adamstac's rem mixin

gistfile1.txt

// Baseline, measured in pixels
// The value should be the same as the font-size value for the html element
// If the html element's font-size is set to 62.5% (of the browser's default font-size of 16px),
// then the variable below would be 10px.
$baseline-px: 10px;

@mixin rem($property, $px-values) {
  // Convert the baseline into rems
  $baseline-rem: $baseline-px / 1rem;
  // Print the first line in pixel values
  #{$property}: $px-values;
  // If there is only one (numeric) value, return the property/value line for it.
  @if type-of($px-values) == "number" {
    #{$property}: $px-values / $baseline-rem; }
  @else {
    // Create an empty list that we can dump values into
    $rem-values: unquote("");
    @each $value in $px-values {
      // If the value is zero, return 0
      @if $value == 0 {
        $rem-values: append($rem-values, $value); }
      @else {
        $rem-values: append($rem-values, $value / $baseline-rem); } }
    // Return the property and its list of converted values
    #{$property}: $rem-values; } }