Generated by SassMeister.com.

SassMeister-input.scss

// ----
// libsass (v3.1.0)
// ----

/// Sass can't split strings natively. Thanks to @HugoGiraudel for https://github.com/at-import/SassyLists

@function sl-explode($string, $delimiter: '', $separator: "space") {
  @if type-of($string) != "string" {
    @warn "`sl-explode` function expecting a string; #{type-of($string)} given.";
    @return null;
  }
  @if type-of($delimiter) != "string" {
    @warn "`sl-explode` function expecting a string; #{type-of($delimiter)} given.";
    @return null;
  }
  $result: ();
  $length: str-length($string);
  @if not index("space" "comma", $separator) {
    $separator: "space";
  }
  @if str-length($delimiter) == 0 {
    @for $i from 1 through $length {
      $result: append($result, str-slice($string, $i, $i));
    }
    @return $result;
  }
  $running: true;
  $remaining: $string;
  @while $running {
    $index: str-index($remaining, $delimiter);
    @if not $index {
      $running: false;
    }
    @else {
      $slice: str-slice($remaining, 1, $index - 1);
      $result: append($result, $slice, $separator);
      $remaining: str-slice($remaining, $index + str-length($delimiter));
    }
  }
  @return append($result, $remaining, $separator);
}


@mixin foo($fraction: '1/1', $cycle: nth(sl-explode($fraction, '/'), 2)) {
  content: $cycle; // should get 1
}

html {
  @include foo;
}

SassMeister-output.css

html {
  content: ""; }