Display an HTML Document on Interface

This is not supported OOTB. Can you extract the button URL and provide a Appian UI link to that external website?

Hi,

Try WebContentField by adding /embed in the URL  some thing like this -> https://www.youtube.com/embed/dQw4w9WgXcQ

a!webContentField(
source: "https://www.youtube.com/.../dQw4w9WgXcQ",
altText: "Example Domain",
height: "MEDIUM",
showBorder: true
)

This is not supported in Appian out of the box, provide a link in Appina UI to take user to external Application.

Yea Appian does not let us use the web content field to show things hosted inside of Appian. You are also correct in stating the doc viewer does not support HTML. 

This may be going out on a limb a bit, but maybe you could create your html document then convert it to pdf. I don't know if the pdf would maintain the links. 

Other than that the simplest route may be what [mention:126a676c85024855948336691b0a7b92:e9ed411860ed4f2ba0265705b8793d05] mentioned. Just make a link in the appian UI. 

The way I've handled this before:

1) create a temporary PDF copy of the HTML file  (note: the HTML will be flattened and will be purely "read-only" in functionality.  it MIGHT still allow clickable hyperlinks, but you'd have to try it to be sure)

2) display the PDF file using the standard Document Viewer Field.

You can create a PDF of an HTML file using, among other things, the PDF from HTML smart service in the Dynamic Document Generator plug-in.  The main caveat here is that the resulting PDF might vary in quality depending on the HTML file it's fed.  But I've used this technique to some degree of success at least once in the past.

Honestly though if your primary use case is to provide the user a link to an external URL, just use an a!safeLink() for that.  Stuff shown in the Document Viewer Field should be assumed as non-interactive IMHO.