I was getting the following warning
Global fetch is deprecated and will be unsupported in a future version. Please pass fetch function as option when instantiating dropbox instance: new Dropbox({fetch})
The warning was produced by the following code
import Dropbox from 'dropbox'
var dbx = new Dropbox.Dropbox({ accessToken: dropBoxAccessToken });
dbx.filesListFolder({path: ''})
There is was not a great post on this at the time of this edit so I am posting in the hopes that it can save someone some time.
The solution is to pass fetch in as follows:
var dbx = new Dropbox.Dropbox({ fetch:fetch, accessToken: dropBoxAccessToken });
No more warning or depreciation issues