Atlaskit does not have a component for file upload


I try to implement a file upload component with atlaskit.

There are two examples. However, one is not working(Atlaskit by Atlassian). To give details, the component is stuck in the uploading state as in the link. Another example is presented in the link Atlaskit by Atlassian It has missing information such as UploadPreviews etc.

Does Atlassian have a complete and working example for file upload?