Although a sitemap.json is the recommended approach for including resources
with a theme, you can also export your site’s data in a LAR (Liferay Archive)
file. A LAR file is version-specific; it won’t work on any version of
Liferay DXP other than the one from which it was exported. This approach does,
however, require less configuration, since it does not require a sitemap or
other files. So, if you’re using the exported resources in the same version of
Liferay DXP and it’s not for a theme on Liferay Marketplace, you may prefer a LAR
file.
To create an archive.lar, export the contents of a site using the site scope.
Then place the archive.lar file in your theme’s
[theme-name]/src/WEB-INF/src/resources-importer folder. A LAR archive does not
require a sitemap.json file or any other files in your
[theme-name]/src/WEB-INF/src/resources-importer folder.