Clojurescript show pdf inside webpage using hiccup

Question

I want to show a pdf file inside the webpage, using Clojurescript. These are what I've tried but it does not show anything.

[:embed {:src "demo.pdf"
         :type "application/pdf"
         :width "500px"
         :height "400px"}]

or

[:object {:data "demo.pdf"
         :type "application/pdf"
         :width "500px"
         :height "400px"}]

Can anyone help me with that? Thank you!