Comment by sbjs

Oh no, I must have mis-explained it.

The file `site/myfile.js` does exist. All FileTree does is recursively load all files in a dir into memory.

The `useTree` module hook does two things:

* Pulls the file from memory when loading it instead of from disk

* Adds a cache busting query string when resolving it for invalidation

Combined with tree.watch(), this essentially allows you to add a very lightweight but extremely accurate hot module replacement system into Node.js

    const tree = new FileTree('src', import.meta.url)
    registerHooks(useTree(tree))
    tree.watch().on('filesUpdated', () => import(tree.root + '/myfile.js'))
    import(tree.root + '/myfile.js')

Now save src/myfile.js and see it re-executed