Contains and Contains-Any

SassMeister-input.scss

// ---
// Sass (v3.2.9)
// ---


// testing containment of any of multiple keys in a complex list

@function contains-any($list, $keys...) {
    $result: false;
    @each $key in $keys {
        @each $item in $list {
            @if length($item) > 1 {
                $result: $result or contains-any($item, $keys...);
            } @else if index($item, $key) {
                $result: true;    
            }
        }
    }
    @return $result;
}

$testlist: body 5, heading (blue red, green yellow);

.test {
    contains: contains-any($testlist, green);
    contains2: contains-any(red blue yellow, green);
}

SassMeister-output.css

.test {
  contains: true;
  contains2: false;
}