I'm testing the new built-in package manager. From
When Vim starts up, after processing your .vimrc, it scans all directories in 'packpath' for plugins under the "pack/*/start" directory. First all those directories are added to 'runtimepath'. Then all the plugins are loaded. See packload-two-steps for how these two steps can be useful.
My folders are looking in this way:
When I'm opening a .js file, I get this log:
This seems to look fine, but the plugin doesn't work at all. Where is the problem?