The resulting Promise holds an async-disposable object whose path property holds the created directory path. When the object is disposed, the directory and its contents will be removed asynchronously if it still exists. If the directory cannot be deleted, disposal will throw an error. The object has an async remove() method which will perform the same task.
Both this function and the disposal function on the resulting object are async, so it should be used with await + await using as in await using dir = await fsPromises.mkdtempDisposable('prefix').
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For detailed information, see the documentation of fsPromises.mkdtemp().
The optional options argument can be a string specifying an encoding, or an object with an encoding property specifying the character encoding to use.