Gio.File.prototype.get_basename
function get_basename(): String { // Gjs wrapper for g_file_get_basename() }
Gets the base name (the last component of the path) for a given Gio.File.
If called for the top level of a system (such as the filesystem root or a uri like sftp://host/) it will return a single directory separator (and on Windows, possibly a drive letter).
The base name is a byte string (not UTF-8). It has no defined encoding or rules other than it may not contain zero bytes. If you want to use filenames in a user interface you should use the display name that you can get by requesting the %G_FILE_ATTRIBUTE_STANDARD_DISPLAY_NAME attribute with Gio.File.prototype.query_info.
This call does no blocking I/O.