Generated by SassMeister.com.

SassMeister-input.scss

// ----
// libsass (v3.2.5)
// ----

// Nested map example
$nested-map: (
  key-1: (
    deep-key-1: (
      deeper-key: true
    ),
    deep-key-2: true
  ),
);

// map-fetch function to fetch nested keys
@function map-fetch($map, $keys) {
    @each $key in $keys {
        $map: map-get($map, $key);
    }
    @return if($map, true, false);
}

// nested fetch that directly fetches from $nested-map specifically
// $key references the 
//
@function nested-fetch($key, $nested-key){
  $result: map-fetch($nested-map, $key $nested-key);
  @return if($result, $result, 'null');
}

$foo: nested-fetch(key-1, deep-key-1 deeper-key);
// returns null(??)
$bar: nested-fetch(key-1, deep-key-2);
// returns true
$baz: map-fetch($nested-map, key-1 deep-key-1 deeper-key);

.foo:before {
  content: '' + $foo + '';
}

.bar:after {
  content: '' + $bar + '';
}

.baz:after {
  content: '' + $baz + '';
}

SassMeister-output.css

.foo:before {
  content: "null";
}

.bar:after {
  content: "true";
}

.baz:after {
  content: "true";
}