* Adds an overload to `map.merge()` that supports merging a nested map.
`map.merge($map1, $keys..., $map2)`: The `$keys` form a path to the nested map
in `$map1`, into which `$map2` gets merged.
See [the Sass documentation][map-merge] for more details.
[map-merge]: https://sass-lang.com/documentation/modules/map#merge
* Adds an overloaded `map.set()` function.
`map.set($map, $key, $value)`: Adds to or updates `$map` with the specified
`$key` and `$value`.
`map.set($map, $keys..., $value)`: Adds to or updates a map that is nested
within `$map`. The `$keys` form a path to the nested map in `$map`, into
which `$value` is inserted.
See [the Sass documentation][map-set] for more details.
[map-set]: https://sass-lang.com/documentation/modules/map#set
* Add support for nested maps to `map.get()`.
For example, `map.get((a: (b: (c: d))), a, b, c)` would return `d`.
See [the documentation][map-get] for more details.
[map-get]: https://sass-lang.com/documentation/modules/map#get
* Add support for nested maps in `map.has-key`.
For example, `map.has-key((a: (b: (c: d))), a, b, c)` would return true.
See [the documentation][map-has-key] for more details.
[map-has-key]: https://sass-lang.com/documentation/modules/map#has-key
* Add a `map.deep-merge()` function. This works like `map.merge()`, except that
nested map values are *also* recursively merged. For example:
map.deep-merge(
(color: (primary: red, secondary: blue),
(color: (secondary: teal)
) // => (color: (primary: red, secondary: teal))
See [the Sass documentation][map-deep-merge] for more details.
[map-deep-merge]: https://sass-lang.com/documentation/modules/map#deep-merge
* Add a `map.deep-remove()` function. This allows you to remove keys from
nested maps by passing multiple keys. For example:
map.deep-remove(
(color: (primary: red, secondary: blue)),
color, primary
) // => (color: (secondary: blue))
See [the Sass documentation][map-deep-remove] for more details.
[map-deep-remove]: https://sass-lang.com/documentation/modules/map#deep-remove
* Fix a bug where custom property values in plain CSS were being parsed as
normal property values.
Dart API
* Add a `Value.tryMap()` function which returns the `Value` as a `SassMap` if
it's a valid map, or `null` otherwise. This allows function authors to safely
retrieve maps even if they're internally stored as empty lists, without having
to catch exceptions from `Value.assertMap()`.