Select or browse for multiple folders in gwt

I have a requirement where I need to select multiple files or folders using the Browse button in GWT. This is the code snippet that I am trying. I can do a multiple file selection but it doesn't work for a single folder selection. public MultiFileSelection( Element element ) { super( element ); element.setAttribute( "multiple", "multiple" ); //$NON-NLS-1$ //$NON-NLS-2$ element.setAttribute( "webkitdirectory", "" ); //$NON-NLS-1$ //$NON-NLS-2$ element.setAttribute( "directory", "" ); //$NON-NLS-1$ //$NON-NLS-2$ } This works for multiple file selection but I cannot achieve a folder selection and my final aim to is to achieve multiple file or folder selection through the same Browse button.

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