sass-list-maps | Polyfill for map data functionality

sass-list-maps is a CSS library. sass-list-maps has no bugs, it has no vulnerabilities, it has a Permissive License and it has low support. You can download it from GitHub.

Maps (known in programming as hashes, dictionaries, or objects1) allow dynamic creating, setting, merging and retrieving of data. They are native to ruby-sass as of version 3.3.x, but for earlier ruby-sass versions, and for the libsass C-based compiler (until the point at which maps are integrated there natively), this is an alternative solution which feature-matches ruby-sass' 3.3.x map functionality using the list data-type. Some additional functions are also provided to allow nested (chained) getting and merging/setting, and inspection for debugging. Compared to ruby-sass' native maps, 'list-maps' are lists like any other list in Sass, but they are lists of pairs, formatted in such a way as to be interpreted like a map. To this purpose, the first item in each pair is interpreted as the 'key', while the second is interpreted as the correspondent 'value'. This 'value' can be any Sass-script data-type, including a list—which means list-maps can contain other list-maps, allowing them to form nested data structures. The formatting used here keeps as close as possible to the syntax of native maps, with the difference that there no colons (:) used. It should be clear that 'list-maps' and ruby-sass 'native' maps are very similar—in fact, they are in principle the same. For this reason it was possible to reverse engineer the map functions of ruby-sass' 3.3+ to use the SassScript list data-type. Moreover, as with native maps in ruby-sass, list functions (e.g. nth(), index()) can be used on list-maps, since they are still lists.