Can ThumbnailGenerator create a thumbnail of a PDF upload?

My ThumbnailGenerator makes thumbnails of images, but doesn’t create a thumbnail of uploaded PDF documents (for instance, a thumbnail of the first page of the document).

Am I doing something wrong or is this how it’s supposed to work?

It’s all client side and relies on the <canvas> element in the browser to parse and resize image files. PDF files are not supported.

Ah, okay, got it. Thanks for responding.