how to use filechooser with allowed type only PDF, and DOC?

[manifsp]

In the filter option how to allow multiple mimetypes at the same time.
i.e
fileChooser.open({"mime": 'application/pdf,application/msword,application/vnd.openxmlformats-officedocument.wordprocessingml.document'}, uri => {});

[CoooWeee]

I think the mime support is not really working. For me '/' works but as soon as I use for example "text/csv" all files including *.csv are greyed out.